7Baggers

ICON Public Limited Company
(NASDAQ:ICLR) 

ICLR stock logo

ICON Public Limited Company, a clinical research organization, provides outsourced development and commercialization services in Ireland, rest of Europe, the United States, and internationally. The company specializes in the strategic development, management, and analysis of programs that support va...

Founded: 1990
Full Time Employees: 15,250
Sector: Healthcare
Industry: Diagnostics & Research

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Quarterly
Annual
    Unit: USD2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2023-12-31 2023-09-30 2023-04-26 2023-02-22 2022-12-31 2022-11-02 2022-07-27 2022-02-22 2021-12-31 2021-11-03 2021-09-30 2021-07-21 2021-06-30 2021-04-28 2021-03-31 2021-02-24 2020-12-31 2020-10-21 2020-09-30 2020-07-22 2020-06-30 2020-04-22 2020-03-31 2020-02-19 2019-12-31 2019-10-23 2019-09-30 2019-07-24 2019-06-30 2019-03-31 2018-12-31 2018-10-24 2018-09-30 2018-07-25 2018-06-30 2018-05-03 2018-03-31 2018-02-15 2017-12-31 2017-10-26 2017-09-30 2017-07-27 2017-06-30 2017-04-27 2017-02-16 2016-12-31 2016-10-20 2016-09-30 2016-07-26 2016-06-30 2016-04-26 2016-03-31 2016-02-23 2015-12-31 2015-10-27 2015-09-30 2015-06-30 2015-04-28 2015-03-31 2015-02-25 2014-12-31 2014-10-23 2014-10-22 2014-07-30 2014-06-30 2014-04-30 2014-03-29 2014-02-20 2013-12-31 2013-11-07 2013-10-24 2013-08-02 2013-07-25 2013-05-02 2013-04-25 2013-02-19 2012-12-31 2012-11-01 2012-07-25 2012-07-24 2012-04-24 2012-02-16 2011-12-31 2011-11-10 2011-10-27 2011-07-20 2011-07-18 2011-04-21 2011-03-31 2011-02-24 2010-12-31 2010-11-02 2010-10-21 2010-07-28 2010-07-27 2010-04-29 2010-04-27 2010-02-25 2009-12-31 2009-10-27 2009-10-21 2009-07-29 2009-07-22 2009-03-31 2009-02-23 2008-12-31 2008-10-21 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-07-25 2007-06-30 2007-03-31 2006-12-31 2006-06-30 2005-12-31 2005-11-30 2005-08-31 
                                                                                                                                 
      revenue
    2,042,812,000 2,017,357,000 2,001,332,000 2,041,101,000 2,030,030,000 2,066,248,000 2,055,099,000 1,978,578,000 1,962,002,000 1,962,002,000 1,942,427,000 1,935,193,000 1,885,121,000 1,885,121,000 1,866,352,000 1,866,352,000 871,155,000 871,155,000 858,198,000 858,198,000 760,229,000 509,264,750 701,729,000 701,729,000 620,228,000 620,228,000 715,102,000 715,102,000 725,409,000 520,107,500 710,441,000 710,441,000 695,137,000 695,137,000 674,852,000 479,188,000 655,017,000 655,017,000 641,610,000 641,610,000 620,125,000 620,125,000                                                                                    
      yoy
    0.63% -2.37% -2.62% 3.16% 3.47% 5.31% 5.80% 2.24% 4.08% 4.08% 4.08% 3.69% 116.39% 116.39% 117.47% 117.47% 14.59% 71.06% 22.30% 22.30% 22.57% -17.89% -1.87% -1.87% -14.50% 19.25% 0.66% 0.66% 4.35% -25.18% 5.27% 48.26% 6.13% 6.13% 5.18% -25.31% 5.63% 5.63%                                                                                        
      qoq
    1.26% 0.80% -1.95% 0.55% -1.75% 0.54% 3.87% 0.84% 0.00% 1.01% 0.37% 2.66% 0.00% 1.01% 0.00% 114.24% 0.00% 1.51% 0.00% 12.89% 49.28% -27.43% 0.00% 13.14% 0.00% -13.27% 0.00% -1.42% 39.47% -26.79% 0.00% 2.20% 0.00% 3.01% 40.83% -26.84% 0.00% 2.09% 0.00% 3.46% 0.00%                                                                                     
      costs and expenses:
                                                                                                                                 
      direct costs
    1,488,364,000 1,455,758,000 1,442,679,000 1,441,736,000 1,438,616,000 1,445,727,000 1,449,136,000 1,395,546,000 1,380,679,000 1,380,679,000 1,375,837,000 1,392,062,000 1,357,303,000 1,357,303,000 1,357,942,000 1,357,942,000 -631,123,000 631,123,000 -626,244,000 626,244,000 -535,347,000 3,424,419,000 -493,410,000 493,410,000 -445,833,000 445,833,000 -505,293,000 505,293,000 -508,191,000 3,440,079,000 -499,791,000 499,791,000 -490,656,000 490,656,000 475,497,000        267,135,000 1,787,485,000 -259,672,000 259,672,000 250,044,000 250,044,000 250,459,000 251,502,000 251,502,000 243,244,000 243,244,000 237,984,000 237,984,000 228,603,000 228,603,000 229,386,000 169,898,250 226,555,000 226,555,000 224,961,000 228,078,000 228,078 229,876,000 229,876,000 229,963,000 229,963,000 227,188,000 227,188,000 216,140,000 216,140,000 215,155,000 215,155,000 213,666,000 213,666,000 214,231,000 214,231,000 202,361,000 202,361,000 192,007,000 192,007,000 183,332,000 180,127,000 180,127,000 162,284,000 158,244,000 158,244,000 158,343,000 158,343,000  150,866,000 144,470,000 144,470,000 139,741,000 139,741,000 139,460,000  130,869,000  131,318,000  131,291,000 94,123,250 127,179,000  125,146,000  124,168,000 125,125,000   127,948,000 122,976,000 113,189,000 100,372,000 91,675,000 83,875,000 83,875,000 78,557,000  60,014,000  48,721,000 47,310,000 
      selling, general and administrative
    197,049,000 205,006,000 198,384,000 151,445,000 205,095,000                                                          79,555,000      87,622,000  78,948,000  79,412,000   81,408,000  77,548,000  75,564,000 73,165,000 73,165,000 70,690,000  69,410,000 67,515,000 67,008,000   71,629,000   59,883,000  61,463,000        57,271,000       61,450,000        42,662,000      26,824,000 26,809,000 
      depreciation and amortization
    98,495,000 97,718,000 95,958,000 96,655,000 93,029,000 149,733,000 146,032,000 145,126,000 142,228,000 142,228,000 141,861,000 144,019,000 139,670,000 139,670,000 140,636,000 140,636,000 -17,276,000 17,276,000 -17,405,000 17,405,000 -17,145,000 115,107,000 -16,801,000 16,801,000 -15,858,000 15,858,000 -16,322,000 16,322,000 -15,708,000 107,392,000 -15,157,000 15,157,000 -15,188,000 15,188,000 15,497,000 116,922,000 -17,062,000 17,062,000 -17,046,000 17,046,000 -16,898,000 16,898,000 16,174,000 106,420,000 -16,280,000 16,280,000 14,395,000 14,395,000 14,448,000 15,455,000 15,455,000 14,543,000 14,543,000 14,457,000 14,457,000 15,120,000 15,120,000 15,142,000 15,142,000 14,366,000 14,366,000 14,244,000  13,925 14,335,000 14,335,000 13,737,000 13,737,000  12,922,000  11,548,000 11,963,000 11,963,000 11,575,000 11,575,000 11,520,000 11,520,000 11,456,000 11,456,000 10,590,000 10,590,000 10,601,000 10,830,000 10,830,000 10,802,000 10,713,000 10,713,000 9,667,000 9,667,000  9,329,000 8,973,000 8,973,000 8,868,000 8,868,000 8,002,000  8,281,000  8,722,000  9,238,000 9,239,000 8,404,000  7,526,000  7,490,000 7,052,000   7,937,000 6,641,000 6,098,000 5,382,000 5,020,000 4,450,000 4,450,000 4,156,000  3,689,000  3,509,000  
      transaction and integration related
    7,020,000 6,717,000 5,404,000 7,907,000 7,856,000                                                                                                                         
      restructuring
     42,950,000 39,346,000 46,334,000    9,729,000 -1,747,000 -1,747,000 6,197,000 22,486,000 24,943,000 24,943,000 6,162,000 6,162,000          18,089,000              12,490,000        7,753,000     4,065,000  4,094,000                                                                       
      goodwill impairment
    165,300,000                                                                                                                             
      total costs and expenses
    1,956,228,000 1,808,149,000 1,781,771,000 1,744,077,000 1,744,596,000 1,800,680,000 1,790,788,000 1,761,789,000 1,758,638,000 1,758,638,000 1,698,683,000 1,757,404,000 1,740,586,000 1,740,586,000 1,861,244,000 1,861,244,000 -758,283,000 758,283,000 -742,184,000 742,184,000 -640,370,000 4,153,117,000 -593,328,000 593,328,000 -545,190,000 563,279,000 -608,811,000 608,811,000 -610,083,000 4,134,783,000 -600,397,000 600,397,000 -589,047,000 589,047,000 572,906,000 3,855,110,000 -557,077,000 557,077,000 -547,208,000 559,698,000 -528,405,000 528,405,000 365,395,000 2,467,054,000 -355,385,000 355,385,000 345,272,000 353,025,000 346,296,000 350,491,000 358,650,000 339,022,000 343,087,000 332,609,000 336,703,000 324,512,000 324,512,000 328,004,000 328,004,000 323,356,000 323,356,000 320,526,000 321,558,000 321,558 329,636,000 338,432,000 328,166,000 328,166,000 327,732,000 327,732,000 306,636,000 306,636,000 306,530,000 306,529,000 306,649,000 306,649,000 307,920,000 303,299,000 293,793,000 289,381,000 275,762,000 281,398,000 264,623,000 266,003,000 260,367,000 240,601,000 235,965,000 235,965,000 244,454,000 239,639,000  217,539,000 213,326,000 218,328,000 210,072,000 210,072,000 207,470,000  198,073,000  192,334,000  197,800,000 197,669,000 189,952,000  199,623,000  192,916,000 193,627,000   198,379,000 193,906,000 179,832,000 160,883,000 148,213,000 130,987,000 130,987,000 121,397,000  96,100,000  79,054,000 77,553,000 
      income from operations
    86,584,000 209,208,000 219,561,000 297,024,000 285,434,000 265,568,000 264,311,000 216,789,000 203,364,000 203,364,000 243,744,000 177,789,000 144,535,000 144,535,000 5,108,000 5,108,000 112,872,000 112,872,000 116,014,000 116,014,000 119,859,000 101,770,000 108,401,000 108,401,000 75,038,000 56,949,000 106,291,000 106,291,000 115,326,000 115,326,000 110,044,000 110,044,000 106,090,000 106,090,000 101,946,000 89,295,000 97,940,000 97,940,000 94,402,000 81,912,000 91,720,000 91,720,000 89,744,000 81,991,000 84,938,000 84,938,000 85,751,000 77,998,000 85,658,000 84,643,000 76,484,000 81,179,000 77,114,000 78,021,000 73,927,000 76,010,000 76,010,000 75,345,000   71,385,000 68,131,000 66,673,000 66,673 60,437,000 51,641,000 59,423,000 59,423,000 48,288,000 48,288,000 42,998,000 42,998,000 38,711,000 38,711,000 33,161,000 33,161,000 26,299,000 30,920,000 22,996,000 27,408,000 24,402,000 18,766,000 20,879,000 11,004,000 16,640,000 11,732,000 6,650,000 6,650,000 -3,682,000 1,133,000  15,506,000 15,971,000 10,969,000 22,014,000 22,014,000 17,625,000  25,678,000  26,778,000  29,619,000 29,750,000 30,409,000  20,378,000  26,915,000 26,466,000   27,132,000 24,394,000 21,512,000 19,787,000 18,703,000 16,060,000 16,060,000 14,692,000  11,336,000  9,018,000 8,368,000 
      yoy
    -69.67% -21.22% -16.93% 37.01% 40.36% 30.59% 8.44% 21.94% 40.70% 40.70% 4671.81% 3380.60% 28.05% 28.05% -95.60% -95.60% -5.83% 10.91% 7.02% 7.02% 59.73% 78.70% 1.99% 1.99% -34.93% -50.62% -3.41% -3.41% 8.71% 8.71% 7.94% 23.24% 8.32% 8.32% 7.99% 9.01% 6.78% 6.78% 5.19% -0.10% 7.98% 7.98% 4.66% 5.12% -0.84% 0.35% 12.12% -3.92% 11.08% 8.49% 3.46% 6.80% 1.45% 3.55%   6.48% 10.59%   18.11% 31.93% 12.20% -99.89% 25.16% 6.94% 38.20% 38.20% 24.74% 24.74% 29.66% 29.66% 47.20% 25.20% 44.20% 20.99% 7.77% 64.77% 10.14% 149.07% 46.65% 59.96% 213.97% 65.47% -551.93% 935.48%  -57.11% -123.05% -89.67%  -29.56% -9.38%  -14.27%  -34.18%  -13.31%  -11.94%  45.35%  12.98%    -0.80% 8.49%   45.07% 51.89% 33.95% 34.68%  41.67%  62.92%      
      qoq
    -58.61% -4.72% -26.08% 4.06% 7.48% 0.48% 21.92% 6.60% 0.00% -16.57% 37.10% 23.01% 0.00% 2729.58% 0.00% -95.47% 0.00% -2.71% 0.00% -3.21% 17.77% -6.12% 0.00% 44.46% 31.76% -46.42% 0.00% -7.83% 0.00% 4.80% 0.00% 3.73% 0.00% 4.06% 14.17% -8.83% 0.00% 3.75% 15.25% -10.69% 0.00% 2.20% 9.46% -3.47% 0.00% -0.95% 9.94% -8.94% 1.20% 10.67% -5.78% 5.27% -1.16% 5.54% -2.74% 0.00% 0.88%    4.78% 2.19% 99900.00% -99.89% 17.03% -13.10% 0.00% 23.06% 0.00% 12.30% 0.00% 11.07% 0.00% 16.74% 0.00% 26.09% -14.95% 34.46% -16.10% 12.32% 30.03% -10.12% 89.74% -33.87% 41.83% 76.42% 0.00% -280.61% -424.98%   -2.91% 45.60% -50.17% 0.00% 24.90%       -0.44% -2.17%     1.70%    11.22% 13.40% 8.72% 5.80% 16.46% 0.00% 9.31%     7.77%  
      operating margin %
    4.24% 10.37% 10.97% 14.55% 14.06% 12.85% 12.86% 10.96% 10.37% 10.37% 12.55% 9.19% 7.67% 7.67% 0.27% 0.27% 12.96% 12.96% 13.52% 13.52% 15.77% 19.98% 15.45% 15.45% 12.10% 9.18% 14.86% 14.86% 15.90% 22.17% 15.49% 15.49% 15.26% 15.26% 15.11% 18.63% 14.95% 14.95% 14.71% 12.77% 14.79% 14.79% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% NaN% NaN% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% -Infinity% Infinity% NaN% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% NaN% Infinity% NaN% Infinity% NaN% Infinity% Infinity% Infinity% NaN% Infinity% NaN% Infinity% Infinity% NaN% NaN% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% NaN% Infinity% NaN% Infinity% Infinity% 
      interest income
    1,761,000 2,054,000 1,802,000 3,008,000 2,434,000 1,720,000 1,273,000 1,072,000 618,000 618,000 1,434,000 166,000 78,000 78,000 53,000 53,000  186,000  257,000    268,000  441,000  1,809,000    1,852,000  1,780,000 1,745,000   1,314,000  1,017,000  823,000    632,000  579,000     462,000  359,000  334,000    531,000 219,000  276  277,000 267,000   259,000  348,000  169,500 223,000  274,000  181,000     314,000   -751,000 226,250 378,000   294,000  233,000 484,000 295,750 543,000  405,000  235,000   154,750 46,000  85,000  488,000 -481,000   665,000 610,000 933,000 756,750 927,000 1,019,000 1,100,000 1,129,000  993,000  603,000 415,000 
      interest expense
    -50,243,000 -50,151,000 -47,609,000 -51,429,000 -53,303,000 -81,034,000 -83,908,000 -86,551,000 -75,185,000 -75,185,000 -63,010,000 -47,111,000 -52,839,000 -52,839,000 -102,306,000 -102,306,000  -24,551,000  -2,727,000    -3,239,000  -3,220,000                    -3,177,000  -3,179,000     -3,227,000  -3,198,000  -3,215,000    -1,178,000 -229,000  -279  -73,000 -158,000   -297,000  -257,000  -254,750 -279,000  -374,000  -366,000     -545,000    -150,500 -247,000   -188,000    -259,500 -267,000  -344,000  -427,000  -474,000 -730,750 -739,000  -960,000      -889,000 -1,086,000 -976,000 -237,000 -911,000  -81,000 -85,000  -55,000    
      income before income tax expense
    38,102,000  173,754,000 248,603,000 234,565,000                                                                                                                         
      income tax expense
    -35,747,000  -19,603,000 11,395,000 -37,437,000                                                                                                                         
      net income
    2,355,000 182,972,000 154,151,000 259,998,000 197,128,000        76,468,000 76,468,000 -94,270,000 -94,270,000 73,865,000 73,865,000 97,122,000 97,122,000 101,234,000 61,889,500 91,641,000 91,641,000 63,588,000 47,760,000 92,329,000 92,329,000 99,861,000 68,998,750 95,483,000 95,483,000 92,215,000 92,215,000 88,297,000 77,126,000 84,527,000 84,527,000 82,905,000 71,868,000 78,098,000 78,098,000 78,508,000 64,324,000 74,154,000 74,154,000 71,601,000 64,817,000 71,409,000 74,262,000 67,122,000 67,436,000 63,879,000 64,657,000 61,074,000 62,964,000 62,964,000 63,429,000 63,542,000 61,542,000 61,542,000 58,584,000 55,869,000 55,869 53,970,000 45,174,000 50,316,000 50,316,000 40,783,000 40,783,000 36,195,000 36,195,000 33,480,000 33,480,000 27,808,000 27,808,000 22,479,000 26,505,000 19,045,000 22,202,000 20,747,000 15,816,000 17,738,000 7,964,000 12,895,000 8,971,000 4,113,000 4,113,000 -2,663,000 1,466,000  13,082,000 12,806,000 8,348,000 22,100,000 22,100,000 19,899,000  22,873,000  22,199,000  23,908,000 30,874,000 23,951,000  18,530,000  20,944,000 21,025,000   21,380,000 18,821,000 16,894,000 15,881,000 14,501,000 13,315,000 13,315,000 12,266,000  9,297,000  6,953,000 6,383,000 
      yoy
    -98.81%            3.52% 3.52% -197.06% -197.06% -27.04% 19.35% 5.98% 5.98% 59.20% 29.58% -0.75% -0.75% -36.32% -30.78% -3.30% -3.30% 8.29% -25.18% 8.14% 23.80% 9.10% 9.10% 6.50% 7.32% 8.23% 8.23% 5.60% 11.73% 5.32% 5.32% 9.65% -0.76% 3.84% -0.15% 6.67% -3.88% 11.79% 14.86% 9.90% 7.10% 1.45% 1.94% -3.88% 2.31% 2.31% 8.27% 13.73% 110054.11% 14.03% 29.69% 11.04% -99.89% 32.33% 10.77% 39.01% 39.01% 21.81% 21.81% 30.16% 30.16% 48.94% 26.32% 46.01% 25.25% 8.35% 67.58% 7.37% 178.78% 60.89% 76.30% 331.27% 93.63% -584.23% 511.94%  -68.56% -120.79% -82.44%  -40.81% -35.65%  -3.38%  -10.36%  -4.33%  -7.31%  29.02%  14.36%    -2.04% 11.71%   47.44% 41.35% 26.88% 29.47%  43.22%  76.41%      
      qoq
    -98.71% 18.70% -40.71% 31.89%         0.00% -181.12% 0.00% -227.62% 0.00% -23.95% 0.00% -4.06% 63.57% -32.47% 0.00% 44.12% 33.14% -48.27% 0.00% -7.54% 44.73% -27.74% 0.00% 3.54% 0.00% 4.44% 14.48% -8.76% 0.00% 1.96% 15.36% -7.98% 0.00% -0.52% 22.05% -13.26% 0.00% 3.57% 10.47% -9.23% -3.84% 10.64% -0.47% 5.57% -1.20% 5.87% -3.00% 0.00% -0.73% -0.18% 3.25% 0.00% 5.05% 4.86% 99900.00% -99.90% 19.47% -10.22% 0.00% 23.37% 0.00% 12.68% 0.00% 8.11% 0.00% 20.40% 0.00% 23.71% -15.19% 39.17% -14.22% 7.01% 31.18% -10.84% 122.73% -38.24% 43.74% 118.11% 0.00% -254.45% -281.65%   2.16% 53.40% -62.23% 0.00% 11.06%       -22.56% 28.90%     -0.39%    13.60% 11.41% 6.38% 9.52% 8.91% 0.00% 8.55%     8.93%  
      net income margin %
    0.12% 9.07% 7.70% 12.74% 9.71% 0% 0% 0% 0% 0% 0% 0% 4.06% 4.06% -5.05% -5.05% 8.48% 8.48% 11.32% 11.32% 13.32% 12.15% 13.06% 13.06% 10.25% 7.70% 12.91% 12.91% 13.77% 13.27% 13.44% 13.44% 13.27% 13.27% 13.08% 16.10% 12.90% 12.90% 12.92% 11.20% 12.59% 12.59% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% -Infinity% Infinity% NaN% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% NaN% Infinity% NaN% Infinity% NaN% Infinity% Infinity% Infinity% NaN% Infinity% NaN% Infinity% Infinity% NaN% NaN% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% NaN% Infinity% NaN% Infinity% Infinity% 
      net income per ordinary share:
                                                                                                                                 
      basic
    30 2,310 1,910 3,170 2,380 2,630 1,990 1,430 1,440 1,440 1,960 1,420 940 1,050 -1,170 -1,170 1,400 1,400 1,840 1,840    1,740  910  1,630    1,730 1,700 1,700 1,640 1,420 1,550 1,550 1,530 1,330 1,450 1,450 1,450 1,190 1,370 1,370 1,330 1,200 1,310 1,350 1,230 1,210 1,150 1,170 1,100 1,140 1,140 1,140 737.5 1,050 1,050 970 930 0.93 89,000 740 810 810 660 660 590 590 540 550 460 460 370 440 320 370 350 165 300 130 210 150 70 77.5 -40 20  220 210 140 370 272.5 330  380  380  410 270 410  320  360 360   370 650 580 550 500 460 460 430  660  500 460 
      diluted
    30 2,300 1,900 3,150 2,360 2,610 1,970 1,410 1,420 1,430 1,940 1,410 920 1,030 -1,170 -1,170 1,380 1,380 1,820 1,820    1,720  900  1,620    1,720 1,690 1,690 1,630 1,420 1,540 1,540 1,510 1,310 1,420 1,420 1,430 1,170 1,350 1,350 1,310 1,190   1,200 1,190 1,130 1,140 1,080  1,120  717.5 1,020 1,020 950 900 0.9 87,000 720 790 790 640 640 570 570 530 530 450 450 360 430 310 360 340 165 290 130 210 150 70 77.5 -40 20  210 210 140 360 267.5 330  380  370  400 265 400  310  350 350   350 620 560 530 490 450 450 420  650  490 450 
      weighted-average number of ordinary shares outstanding:
                                                                                                                                 
      basic
    77,373,534,000 79,245,448,000 80,552,734,000 82,482,764,000 82,831,300,000 82,101,813,000 82,215,627,000 81,784,389,000 81,683,430,000 81,532,320,000 81,582,375,000 81,398,071,000 81,488,189,000 67,110,186,000 80,771,397,000 80,771,397,000 52,909,368,000 52,909,368,000 52,811,460,000 52,811,460,000 52,783,886,000 52,859,911,000 52,737,299,000 52,737,299,000 52,570,104,000 52,570,104,000 53,348,355,000 53,348,355,000 53,630,331,000 53,859,537,000 54,004,963,000 54,004,963,000 53,957,446,000 53,957,446,000 53,845,407,000 54,118,764,000 54,368,656,000 54,368,656,000 54,109,702,000 54,109,702,000 53,925,560,000 53,925,560,000 54,187,688,000 54,129,439,000 54,109,566,000 54,109,566,000 53,846,544,000 53,846,544,000 54,372,931,000 54,930,541,000 55,248,900,000 55,734,773,000 55,734,773,000 55,318,923,000 55,318,923,000 55,011,019,000 55,011,019,000 55,783,113,000 58,746,935,000 58,681,332,000 58,659,782,000 60,244,982,000 60,281,059,000 60,281,059 60,394,465,000 61,496,115,000 61,878,429,000 61,878,429,000 61,934,923,000 61,934,923,000 61,776,643,000 61,776,643,000 61,431,281,000 60,907,274,000 61,069,260,000 61,069,260,000 60,724,296,000 60,724,296,000 60,404,242,000 60,404,242,000 60,053,987,000 59,968,174,000 59,754,010,000 59,978,509,000 59,978,509,000 60,086,104,000 60,371,190,000  60,471,985,000 60,471,985,000  60,390,788,000 60,283,078,000 60,283,078,000 60,145,383,000 59,718,934,000 59,940,045,000  59,667,635,000  59,122,650,000  58,808,946,000 58,636,878,000   58,576,384,000  58,537,795,000 58,509,852,000    29,106,694,000           13,919,606,000 
      diluted
    78,082,459,000 79,547,444,000 80,924,355,000 83,032,424,000 83,445,827,000 82,717,640,000 82,972,888,000 82,605,659,000 82,452,097,000 82,468,363,000 82,493,211,000 82,312,946,000 82,827,674,000 68,068,311,000 80,771,397,000 80,771,397,000 53,381,501,000 53,381,501,000 53,310,453,000 53,310,453,000 53,291,849,000 53,283,585,000 53,194,327,000 53,194,327,000 53,028,567,000 53,028,567,000 53,905,022,000 53,905,022,000 54,219,975,000 54,333,461,000 54,550,672,000 54,550,672,000 54,449,117,000 54,449,117,000 54,142,510,000 54,790,663,000 54,901,404,000 54,901,404,000 54,852,453,000 54,852,453,000 54,985,790,000 54,985,790,000 54,844,232,000 54,849,046,000 54,756,184,000 54,756,184,000 54,530,805,000 54,530,805,000   56,407,136,000 56,645,239,000 56,645,239,000 56,580,799,000 56,580,799,000  56,242,164,000  60,290,033,000 60,391,448,000 60,369,898,000 61,801,687,000 61,856,347,000 61,856,347 61,908,135,000 63,131,417,000 63,442,607,000 63,442,607,000 63,343,269,000 63,343,269,000 63,225,797,000 63,225,797,000 62,828,079,000 62,253,251,000 62,473,645,000 62,473,645,000 61,898,903,000 61,898,903,000 61,323,594,000 61,323,594,000 60,813,483,000 60,450,706,000 60,366,137,000 60,630,891,000 60,630,891,000 60,708,469,000 60,759,588,000  61,063,020,000 61,063,020,000  61,114,996,000 60,982,948,000 60,982,948,000 60,817,130,000 60,637,103,000 60,743,403,000  60,768,374,000  60,313,774,000  60,092,814,000 59,900,504,000   59,674,939,000  59,771,335,000 59,902,857,000    30,156,563,000           14,150,212,000 
      income before income tax benefit /
     161,111,000                                                                                                                            
      income tax benefit /
     21,861,000                                                                                                                            
      income before share of losses from equity method investments
       259,998,000 197,128,000                                                                                                                         
      share of losses from equity method investments
                                                                                                                                 
      net income per ordinary share
                                                                                                                                 
      basic
    30 2,310 1,910 3,170 2,380 2,630 1,990 1,430 1,440 1,440 1,960 1,420 940 1,050 -1,170 -1,170 1,400 1,400 1,840 1,840    1,740  910  1,630    1,730 1,700 1,700 1,640 1,420 1,550 1,550 1,530 1,330 1,450 1,450 1,450 1,190 1,370 1,370 1,330 1,200 1,310 1,350 1,230 1,210 1,150 1,170 1,100 1,140 1,140 1,140 737.5 1,050 1,050 970 930 0.93 89,000 740 810 810 660 660 590 590 540 550 460 460 370 440 320 370 350 165 300 130 210 150 70 77.5 -40 20  220 210 140 370 272.5 330  380  380  410 270 410  320  360 360   370 650 580 550 500 460 460 430  660  500 460 
      diluted
    30 2,300 1,900 3,150 2,360 2,610 1,970 1,410 1,420 1,430 1,940 1,410 920 1,030 -1,170 -1,170 1,380 1,380 1,820 1,820    1,720  900  1,620    1,720 1,690 1,690 1,630 1,420 1,540 1,540 1,510 1,310 1,420 1,420 1,430 1,170 1,350 1,350 1,310 1,190   1,200 1,190 1,130 1,140 1,080  1,120  717.5 1,020 1,020 950 900 0.9 87,000 720 790 790 640 640 570 570 530 530 450 450 360 430 310 360 340 165 290 130 210 150 70 77.5 -40 20  210 210 140 360 267.5 330  380  370  400 265 400  310  350 350   350 620 560 530 490 450 450 420  650  490 450 
      weighted-average number of ordinary shares outstanding
                                                                                                                                 
      basic
    77,373,534,000 79,245,448,000 80,552,734,000 82,482,764,000 82,831,300,000 82,101,813,000 82,215,627,000 81,784,389,000 81,683,430,000 81,532,320,000 81,582,375,000 81,398,071,000 81,488,189,000 67,110,186,000 80,771,397,000 80,771,397,000 52,909,368,000 52,909,368,000 52,811,460,000 52,811,460,000 52,783,886,000 52,859,911,000 52,737,299,000 52,737,299,000 52,570,104,000 52,570,104,000 53,348,355,000 53,348,355,000 53,630,331,000 53,859,537,000 54,004,963,000 54,004,963,000 53,957,446,000 53,957,446,000 53,845,407,000 54,118,764,000 54,368,656,000 54,368,656,000 54,109,702,000 54,109,702,000 53,925,560,000 53,925,560,000 54,187,688,000 54,129,439,000 54,109,566,000 54,109,566,000 53,846,544,000 53,846,544,000 54,372,931,000 54,930,541,000 55,248,900,000 55,734,773,000 55,734,773,000 55,318,923,000 55,318,923,000 55,011,019,000 55,011,019,000 55,783,113,000 58,746,935,000 58,681,332,000 58,659,782,000 60,244,982,000 60,281,059,000 60,281,059 60,394,465,000 61,496,115,000 61,878,429,000 61,878,429,000 61,934,923,000 61,934,923,000 61,776,643,000 61,776,643,000 61,431,281,000 60,907,274,000 61,069,260,000 61,069,260,000 60,724,296,000 60,724,296,000 60,404,242,000 60,404,242,000 60,053,987,000 59,968,174,000 59,754,010,000 59,978,509,000 59,978,509,000 60,086,104,000 60,371,190,000  60,471,985,000 60,471,985,000  60,390,788,000 60,283,078,000 60,283,078,000 60,145,383,000 59,718,934,000 59,940,045,000  59,667,635,000  59,122,650,000  58,808,946,000 58,636,878,000   58,576,384,000  58,537,795,000 58,509,852,000    29,106,694,000           13,919,606,000 
      diluted
    78,082,459,000 79,547,444,000 80,924,355,000 83,032,424,000 83,445,827,000 82,717,640,000 82,972,888,000 82,605,659,000 82,452,097,000 82,468,363,000 82,493,211,000 82,312,946,000 82,827,674,000 68,068,311,000 80,771,397,000 80,771,397,000 53,381,501,000 53,381,501,000 53,310,453,000 53,310,453,000 53,291,849,000 53,283,585,000 53,194,327,000 53,194,327,000 53,028,567,000 53,028,567,000 53,905,022,000 53,905,022,000 54,219,975,000 54,333,461,000 54,550,672,000 54,550,672,000 54,449,117,000 54,449,117,000 54,142,510,000 54,790,663,000 54,901,404,000 54,901,404,000 54,852,453,000 54,852,453,000 54,985,790,000 54,985,790,000 54,844,232,000 54,849,046,000 54,756,184,000 54,756,184,000 54,530,805,000 54,530,805,000   56,407,136,000 56,645,239,000 56,645,239,000 56,580,799,000 56,580,799,000  56,242,164,000  60,290,033,000 60,391,448,000 60,369,898,000 61,801,687,000 61,856,347,000 61,856,347 61,908,135,000 63,131,417,000 63,442,607,000 63,442,607,000 63,343,269,000 63,343,269,000 63,225,797,000 63,225,797,000 62,828,079,000 62,253,251,000 62,473,645,000 62,473,645,000 61,898,903,000 61,898,903,000 61,323,594,000 61,323,594,000 60,813,483,000 60,450,706,000 60,366,137,000 60,630,891,000 60,630,891,000 60,708,469,000 60,759,588,000  61,063,020,000 61,063,020,000  61,114,996,000 60,982,948,000 60,982,948,000 60,817,130,000 60,637,103,000 60,743,403,000  60,768,374,000  60,313,774,000  60,092,814,000 59,900,504,000   59,674,939,000  59,771,335,000 59,902,857,000    30,156,563,000           14,150,212,000 
      selling, general and administrative expense
         143,249,750 185,187,000 200,006,000 226,753,000 138,000,000 166,787,000 189,953,000 202,716,000 95,653,500 206,713,000 206,713,000 -109,884,000 109,884,000 -98,535,000 98,535,000 -87,878,000 -63,453,000 -83,117,000 83,117,000 -83,499,000 83,499,000 -87,196,000 87,196,000 -86,184,000 -62,641,000 -85,449,000 85,449,000 -83,203,000 83,203,000 81,912,000 -60,667,500 -80,819,000 80,819,000 -80,936,000 80,936,000 -80,915,000 80,915,000 82,086,000 -60,413,750 -79,433,000 79,433,000 80,833,000 80,833,000 81,389,000 83,534,000 60,548,000 81,235,000 81,235,000 80,168,000 80,168,000 80,789,000 80,789,000 83,476,000 60,827,500 82,435,000 82,435,000 81,321,000  79,555 85,425,000 62,759,000 84,466,000 84,466,000  87,622,000  78,948,000  58,630,000 81,408,000  77,548,000  75,564,000     69,410,000    47,214,000 71,629,000   57,344,000  59,883,000  42,806,250 60,008,000  58,923,000  52,294,000   43,409,250 54,369,000  58,010,000  61,258,000    62,494,000 64,289,000 60,545,000 33,216,000 51,518,000  42,662,000 38,684,000  32,397,000    
      transaction and integration-related expenses
         8,629,000 10,433,000 11,382,000 10,725,000 7,242,500 8,001,000 8,884,000 15,954,000 45,577,250 149,791,000 149,791,000                                                                                                              
      income before benefit from income taxes
         109,553,250 181,676,000                                     62,144,500 82,393,000   75,398,000   73,447,000 78,414,000          68,121,000 66,670,000         43,089,000 38,750,000    26,199,000  22,811,000  24,124,000 18,488,000 20,627,000 10,773,000 16,409,000 11,697,000    1,264,000           26,586,000             23,918,000            
      benefit from income taxes
         -10,478,250 -18,011,000                                     -7,853,500 -8,239,000   -10,581,000   -6,325,000 -10,978,000          -9,537,000 -10,801,000         -6,894,000 -5,270,000    -3,720,000  -3,766,000  -3,377,000 -20,930,000 2,889,000 -2,809,000 3,514,000 2,726,000    202,000           -4,387,000             -4,891,000            
      income before share of earnings from equity method investments
         99,075,000 163,665,000 117,037,000 117,938,000 117,938,000 161,156,000 116,590,000  77,158,000 -93,582,000 -93,582,000 74,374,000 74,374,000 97,396,000 97,396,000 101,517,000 61,910,250 91,724,000 91,724,000                                                                                                      
      share of losses in equity method investments
         -95,750                                                                                                                        
      net income attributable to the group
         98,979,250 163,665,000 116,654,000 117,445,000 117,445,000 160,154,000 115,734,000 76,468,000 76,468,000 -94,270,000 -94,270,000 73,865,000 73,865,000 97,122,000 97,122,000 101,234,000 85,406,000 91,641,000 91,641,000 63,588,000 47,760,000 91,696,000 91,696,000 99,007,000 99,007,000 94,825,000 94,825,000 91,857,000 91,857,000                                                                                            
      net income per ordinary share attributable to the group
                                                                                                                                 
      basic
    30 2,310 1,910 3,170 2,380 2,630 1,990 1,430 1,440 1,440 1,960 1,420 940 1,050 -1,170 -1,170 1,400 1,400 1,840 1,840    1,740  910  1,630    1,730 1,700 1,700 1,640 1,420 1,550 1,550 1,530 1,330 1,450 1,450 1,450 1,190 1,370 1,370 1,330 1,200 1,310 1,350 1,230 1,210 1,150 1,170 1,100 1,140 1,140 1,140 737.5 1,050 1,050 970 930 0.93 89,000 740 810 810 660 660 590 590 540 550 460 460 370 440 320 370 350 165 300 130 210 150 70 77.5 -40 20  220 210 140 370 272.5 330  380  380  410 270 410  320  360 360   370 650 580 550 500 460 460 430  660  500 460 
      diluted
    30 2,300 1,900 3,150 2,360 2,610 1,970 1,410 1,420 1,430 1,940 1,410 920 1,030 -1,170 -1,170 1,380 1,380 1,820 1,820    1,720  900  1,620    1,720 1,690 1,690 1,630 1,420 1,540 1,540 1,510 1,310 1,420 1,420 1,430 1,170 1,350 1,350 1,310 1,190   1,200 1,190 1,130 1,140 1,080  1,120  717.5 1,020 1,020 950 900 0.9 87,000 720 790 790 640 640 570 570 530 530 450 450 360 430 310 360 340 165 290 130 210 150 70 77.5 -40 20  210 210 140 360 267.5 330  380  370  400 265 400  310  350 350   350 620 560 530 490 450 450 420  650  490 450 
      income before provision for income taxes
           131,310,000 128,797,000 109,763,500 182,168,000 130,844,000 91,774,000 26,226,500 -97,145,000 -97,145,000 88,507,000 88,507,000 113,544,000 113,544,000 116,686,000 98,597,000 105,430,000 105,430,000 72,259,000 54,170,000 104,919,000 104,919,000 113,478,000 113,478,000 108,503,000 108,503,000 104,671,000 104,671,000 100,337,000 87,696,000 96,053,000 96,053,000 92,117,000 79,627,000 88,748,000 88,748,000 87,232,000   82,393,000 83,151,000  83,034,000 81,606,000   74,349,000 75,182,000 71,088,000 73,129,000 73,129,000 73,319,000   70,738,000   66,670 60,641,000 37,717,750 59,532,000 59,532,000 48,250,000 48,250,000 43,089,000   20,528,750 33,105,000 33,105,000  30,820,000  27,223,000       5,899,000 5,899,000 -3,551,000   15,612,000 16,037,000 11,035,000 22,498,000 22,498,000 17,901,000  25,739,000     29,276,000 29,716,000  19,503,000  26,179,000    26,908,000  21,469,000 20,446,000 18,719,000  17,079,000 15,736,000  12,274,000    
      provision for income taxes
           -14,273,000 -10,859,000 -12,138,000 -21,012,000 -14,254,000 -14,616,000    -14,133,000 -14,133,000 -16,148,000 -16,148,000 -15,169,000 -12,908,000 -13,706,000 -13,706,000 -8,671,000 -6,410,000 -12,590,000  -13,617,000 -9,379,000 -13,020,000  -12,456,000   -7,847,000 -11,526,000  -9,212,000  -10,650,000  -8,724,000   -8,239,000 -11,550,000  -11,625,000 -7,344,000   -10,470,000 -10,525,000 -10,014,000 -10,165,000 -10,165,000 -9,890,000 -9,777,000 -9,196,000 -9,196,000   -10,801 -6,671,000 -5,894,250 -9,216,000 -9,216,000 7,467,000 -7,467,000 -6,894,000   -3,195,750 -5,297,000 5,297,000  4,315,000  -5,021,000       -1,786,000 -1,786,000 888,000   -2,530,000 3,231,000  -398,000 -398,000 1,998,000  -2,866,000    -5,237,000 1,598,000 -5,765,000  -973,000   5,474,000   -5,355,000  -4,247,000 -4,486,000 -4,158,000 3,758,000 -3,758,000 -3,428,000  -2,943,000  2,618,000 2,459,000 
      share of equity method investments
           -383,000 -493,000 -493,000 -1,002,000 -856,000 -690,000 -690,000 -688,000 -688,000 -509,000 -509,000 -274,000 -274,000 -283,000 -283,000 -83,000 -83,000                                                                                                      
      net income per ordinary share attributable to the group:
                                                                                                                                 
      basic
    30 2,310 1,910 3,170 2,380 2,630 1,990 1,430 1,440 1,440 1,960 1,420 940 1,050 -1,170 -1,170 1,400 1,400 1,840 1,840    1,740  910  1,630    1,730 1,700 1,700 1,640 1,420 1,550 1,550 1,530 1,330 1,450 1,450 1,450 1,190 1,370 1,370 1,330 1,200 1,310 1,350 1,230 1,210 1,150 1,170 1,100 1,140 1,140 1,140 737.5 1,050 1,050 970 930 0.93 89,000 740 810 810 660 660 590 590 540 550 460 460 370 440 320 370 350 165 300 130 210 150 70 77.5 -40 20  220 210 140 370 272.5 330  380  380  410 270 410  320  360 360   370 650 580 550 500 460 460 430  660  500 460 
      diluted
    30 2,300 1,900 3,150 2,360 2,610 1,970 1,410 1,420 1,430 1,940 1,410 920 1,030 -1,170 -1,170 1,380 1,380 1,820 1,820    1,720  900  1,620    1,720 1,690 1,690 1,630 1,420 1,540 1,540 1,510 1,310 1,420 1,420 1,430 1,170 1,350 1,350 1,310 1,190   1,200 1,190 1,130 1,140 1,080  1,120  717.5 1,020 1,020 950 900 0.9 87,000 720 790 790 640 640 570 570 530 530 450 450 360 430 310 360 340 165 290 130 210 150 70 77.5 -40 20  210 210 140 360 267.5 330  380  370  400 265 400  310  350 350   350 620 560 530 490 450 450 420  650  490 450 
      income before share of earnings from equity method
                77,158,000                                                                                                                 
      net income attributable to noncontrolling interest
                                                                                                                                 
      benefit arising/(provision) for income taxes
                 -6,679,500 3,563,000                                                                                                               
      benefit arising (provision) for income taxes
                   3,563,000                                                                                                              
      restructuring costs
                                                                                                                                 
      net interest expense
                    -24,365,000  -2,470,000  -3,173,000 -3,173,000 -2,971,000  -2,779,000  -1,372,000  -1,848,000 -1,142,250 -1,541,000  -1,419,000   -1,786,000 -1,887,000  -2,285,000  -2,972,000  -2,512,000 -1,942,250 -2,545,000  -2,600,000  -2,624,000 -3,037,000 -2,121,250 -2,765,000  -2,839,000  -2,881,000  -2,026,000 -165,000 -647,000     204,000   109,000        -56,000  -100,000  -185,000 -278,000                                             
      net income attributable to non-controlling interest
                         -158,250     -633,000  -854,000 -254,000 -658,000  -358,000                                                                                             
      adjusted net income per ordinary share attributable to the group:
                                                                                                                                 
      adjusted basic
                        1,920 1,167.5 1,740  1,210  1,720  1,850 1,275 1,760 1,760                                                                                              
      adjusted diluted
                        1,900 1,157.5 1,720  1,200  1,700  1,830 1,265 1,740 1,740                                                                                              
      adjusted net income per ordinary share attributable to the group
                                                                                                                                 
      revenue:
                                                                                                                                 
      reimbursable expenses
                                              -181,166,000 -115,679,000 -155,846,000 -155,846,000 -160,758,000 -160,758,000 -146,112,000 -175,331,000 -175,331,000 -202,060,000 -202,060,000 -179,017,000 -179,017,000 -142,061,000 -142,061,000 -173,710,000 -173,710,000 -162,354,000 -162,354,000 -135,441,000 115,135,000 -115,135 -138,138,000 -138,138,000 -131,538,000 -131,538,000 130,384,000 -130,384,000 126,910,000 -126,910,000 104,821,000 -104,822,000 -105,788,000 105,788,000 -135,407,000 135,407,000 -102,270,000 102,270,000 106,189,000 -671,785,000 89,463,000 -102,613,000 102,613,000 90,722,000 95,319,000 -95,319,000 -94,560,000 94,560,000  -84,651,000 76,250,000  85,193,000 -85,193,000 -98,135,000  -89,336,000  -90,439,000  94,122,000 -94,122,000 -96,818,000  -80,968,000   75,277,000                
      - reimbursable expenses
                                       -126,927,000 -179,642,000 179,642,000 -169,313,000 169,313,000 -158,753,000 158,753,000                                                                                    
      - other direct costs
                                       -207,826,500 -279,554,000 279,554,000 -279,913,000 279,913,000 -271,839,000 271,839,000                                                                                    
      gross revenue
                                              636,305,000 636,305,000 596,169,000 596,169,000 591,781,000 591,781,000 578,066,000 610,465,000 610,465,000 622,261,000 622,261,000 589,647,000 589,647,000 542,583,000 542,583,000 577,059,000 577,059,000 557,095,000 557,095,000 524,098,000 503,366,000 503,366 528,211,000 528,211,000 519,127,000 519,127,000 506,404,000 506,404,000 476,544,000 476,544,000 450,062,000 450,062,000 445,598,000 445,598,000 469,626,000 469,626,000 419,059,000 419,059,000 406,353,000 406,353,000 374,965,000 379,620,000 379,620,000 343,055,000 337,934,000 337,934,000 335,332,000 335,332,000  317,696,000 305,547,000 305,547,000 317,279,000 317,279,000 323,230,000  313,087,000  309,551,000  321,541,000 321,541,000 317,179,000  300,969,000  318,538,000 295,370,000   313,637,000 316,592,000 283,853,000 241,531,000 231,819,000 207,383,000 207,383,000 186,740,000  153,744,000  120,344,000 115,352,000 
      net revenue
                                              455,139,000 455,139,000 440,323,000 440,323,000 431,023,000 431,023,000 431,954,000 435,134,000 435,134,000 420,201,000 420,201,000 410,630,000 410,630,000 400,522,000 400,522,000 403,349,000 403,349,000 394,741,000 394,741,000 388,657,000 388,231,000 388,231 390,073,000 390,073,000 387,589,000 387,589,000 376,020,000 376,020,000 349,634,000 349,634,000 345,241,000 345,240,000 339,810,000 339,810,000 334,219,000 334,219,000 316,789,000 316,789,000 300,164,000 300,164,000 285,502,000 277,007,000 277,007,000 252,333,000 242,615,000 242,615,000 240,772,000 240,772,000  233,045,000 229,297,000 229,297,000 232,086,000 232,086,000 225,095,000  223,751,000  219,112,000  227,419,000 227,419,000 220,361,000  220,001,000  219,831,000 220,093,000   225,511,000 218,300,000 201,344,000 180,670,000 166,916,000 147,047,000 147,047,000 136,089,000  107,436,000  88,072,000 85,921,000 
      net income per ordinary share:
                                                                                                                                 
      basic
    30 2,310 1,910 3,170 2,380 2,630 1,990 1,430 1,440 1,440 1,960 1,420 940 1,050 -1,170 -1,170 1,400 1,400 1,840 1,840    1,740  910  1,630    1,730 1,700 1,700 1,640 1,420 1,550 1,550 1,530 1,330 1,450 1,450 1,450 1,190 1,370 1,370 1,330 1,200 1,310 1,350 1,230 1,210 1,150 1,170 1,100 1,140 1,140 1,140 737.5 1,050 1,050 970 930 0.93 89,000 740 810 810 660 660 590 590 540 550 460 460 370 440 320 370 350 165 300 130 210 150 70 77.5 -40 20  220 210 140 370 272.5 330  380  380  410 270 410  320  360 360   370 650 580 550 500 460 460 430  660  500 460 
      pro forma diluted
                                                    1,290 1,330      1,120  1,110                                                                    
      weighted-average number of ordinary shares outstanding:
                                                                                                                                 
      basic
    77,373,534,000 79,245,448,000 80,552,734,000 82,482,764,000 82,831,300,000 82,101,813,000 82,215,627,000 81,784,389,000 81,683,430,000 81,532,320,000 81,582,375,000 81,398,071,000 81,488,189,000 67,110,186,000 80,771,397,000 80,771,397,000 52,909,368,000 52,909,368,000 52,811,460,000 52,811,460,000 52,783,886,000 52,859,911,000 52,737,299,000 52,737,299,000 52,570,104,000 52,570,104,000 53,348,355,000 53,348,355,000 53,630,331,000 53,859,537,000 54,004,963,000 54,004,963,000 53,957,446,000 53,957,446,000 53,845,407,000 54,118,764,000 54,368,656,000 54,368,656,000 54,109,702,000 54,109,702,000 53,925,560,000 53,925,560,000 54,187,688,000 54,129,439,000 54,109,566,000 54,109,566,000 53,846,544,000 53,846,544,000 54,372,931,000 54,930,541,000 55,248,900,000 55,734,773,000 55,734,773,000 55,318,923,000 55,318,923,000 55,011,019,000 55,011,019,000 55,783,113,000 58,746,935,000 58,681,332,000 58,659,782,000 60,244,982,000 60,281,059,000 60,281,059 60,394,465,000 61,496,115,000 61,878,429,000 61,878,429,000 61,934,923,000 61,934,923,000 61,776,643,000 61,776,643,000 61,431,281,000 60,907,274,000 61,069,260,000 61,069,260,000 60,724,296,000 60,724,296,000 60,404,242,000 60,404,242,000 60,053,987,000 59,968,174,000 59,754,010,000 59,978,509,000 59,978,509,000 60,086,104,000 60,371,190,000  60,471,985,000 60,471,985,000  60,390,788,000 60,283,078,000 60,283,078,000 60,145,383,000 59,718,934,000 59,940,045,000  59,667,635,000  59,122,650,000  58,808,946,000 58,636,878,000   58,576,384,000  58,537,795,000 58,509,852,000    29,106,694,000           13,919,606,000 
      costs and expenses
                                                                                                                                 
      depreciation and amortisation
                                                                  13,925,000      12,922,000  11,548,000                                                       
      net interest income /
                                                                                             131,000                                    
      weighted-average number of ordinary shares
                                                                                                                                 
      basic
    77,373,534,000 79,245,448,000 80,552,734,000 82,482,764,000 82,831,300,000 82,101,813,000 82,215,627,000 81,784,389,000 81,683,430,000 81,532,320,000 81,582,375,000 81,398,071,000 81,488,189,000 67,110,186,000 80,771,397,000 80,771,397,000 52,909,368,000 52,909,368,000 52,811,460,000 52,811,460,000 52,783,886,000 52,859,911,000 52,737,299,000 52,737,299,000 52,570,104,000 52,570,104,000 53,348,355,000 53,348,355,000 53,630,331,000 53,859,537,000 54,004,963,000 54,004,963,000 53,957,446,000 53,957,446,000 53,845,407,000 54,118,764,000 54,368,656,000 54,368,656,000 54,109,702,000 54,109,702,000 53,925,560,000 53,925,560,000 54,187,688,000 54,129,439,000 54,109,566,000 54,109,566,000 53,846,544,000 53,846,544,000 54,372,931,000 54,930,541,000 55,248,900,000 55,734,773,000 55,734,773,000 55,318,923,000 55,318,923,000 55,011,019,000 55,011,019,000 55,783,113,000 58,746,935,000 58,681,332,000 58,659,782,000 60,244,982,000 60,281,059,000 60,281,059 60,394,465,000 61,496,115,000 61,878,429,000 61,878,429,000 61,934,923,000 61,934,923,000 61,776,643,000 61,776,643,000 61,431,281,000 60,907,274,000 61,069,260,000 61,069,260,000 60,724,296,000 60,724,296,000 60,404,242,000 60,404,242,000 60,053,987,000 59,968,174,000 59,754,010,000 59,978,509,000 59,978,509,000 60,086,104,000 60,371,190,000  60,471,985,000 60,471,985,000  60,390,788,000 60,283,078,000 60,283,078,000 60,145,383,000 59,718,934,000 59,940,045,000  59,667,635,000  59,122,650,000  58,808,946,000 58,636,878,000   58,576,384,000  58,537,795,000 58,509,852,000    29,106,694,000           13,919,606,000 
      diluted
    78,082,459,000 79,547,444,000 80,924,355,000 83,032,424,000 83,445,827,000 82,717,640,000 82,972,888,000 82,605,659,000 82,452,097,000 82,468,363,000 82,493,211,000 82,312,946,000 82,827,674,000 68,068,311,000 80,771,397,000 80,771,397,000 53,381,501,000 53,381,501,000 53,310,453,000 53,310,453,000 53,291,849,000 53,283,585,000 53,194,327,000 53,194,327,000 53,028,567,000 53,028,567,000 53,905,022,000 53,905,022,000 54,219,975,000 54,333,461,000 54,550,672,000 54,550,672,000 54,449,117,000 54,449,117,000 54,142,510,000 54,790,663,000 54,901,404,000 54,901,404,000 54,852,453,000 54,852,453,000 54,985,790,000 54,985,790,000 54,844,232,000 54,849,046,000 54,756,184,000 54,756,184,000 54,530,805,000 54,530,805,000   56,407,136,000 56,645,239,000 56,645,239,000 56,580,799,000 56,580,799,000  56,242,164,000  60,290,033,000 60,391,448,000 60,369,898,000 61,801,687,000 61,856,347,000 61,856,347 61,908,135,000 63,131,417,000 63,442,607,000 63,442,607,000 63,343,269,000 63,343,269,000 63,225,797,000 63,225,797,000 62,828,079,000 62,253,251,000 62,473,645,000 62,473,645,000 61,898,903,000 61,898,903,000 61,323,594,000 61,323,594,000 60,813,483,000 60,450,706,000 60,366,137,000 60,630,891,000 60,630,891,000 60,708,469,000 60,759,588,000  61,063,020,000 61,063,020,000  61,114,996,000 60,982,948,000 60,982,948,000 60,817,130,000 60,637,103,000 60,743,403,000  60,768,374,000  60,313,774,000  60,092,814,000 59,900,504,000   59,674,939,000  59,771,335,000 59,902,857,000    30,156,563,000           14,150,212,000 
      restructuring and other items
                                                                             2,258,250   4,621,000  4,412,000                                               
      net interest income
                                                                        -38,000  91,000                      66,000                                 
      net interest income/
                                                                            39,000                                                     
      net interest (expense)/income
                                                                                     -129,500 -252,000  -231,000 -35,000                                        
      restructuring and other non-recurring items
                                                                                       5,636,000                                          
      icon plc
                                                                                                                                 
      consolidated income statements
                                                                                                                                 
      restructuring charges
                                                                                           2,454,250 4,815,000     5,002,000                                
      one-time net charges
                                                                                                           -133,000   8,941,000                   
      income before provision of income taxes
                                                                                                          29,145,000       25,985,000        17,079,000      9,621,000 8,783,000 
      minority interest
                                                                                                                 -514,000   -173,000 -206,000 -328,000 -79,000 -60,000 6,000 -6,000 -42,000  -34,000  50,000 -59,000 
      weighted average number of ordinary shares outstanding:
                                                                                                                                 
      basic
                                                                                                            58,624,028,000      58,245,240,000  58,451,960,000  28,902,630,000 28,705,272,000 28,760,726,000 28,684,201,000 28,684,201,000 28,564,498,000 28,314,985,000 14,132,745,000  14,005,454,000  
      diluted
                                                                                                            59,953,574,000      60,221,587,000  61,847,265,000  30,039,736,000 29,747,964,000 29,826,457,000 29,685,489,000 29,685,489,000 29,508,662,000 28,863,334,000 14,347,765,000  14,261,734,000  
      subcontractor costs
                                                                                                                    -88,126,000 -98,292,000 -82,509,000 -60,861,000 -64,903,000 60,336,000 -60,336,000 -50,651,000  -46,308,000  32,272,000 29,431,000 
      weighted average number of ordinary shares
                                                                                                                                 
      basic
                                                                                                            58,624,028,000      58,245,240,000  58,451,960,000  28,902,630,000 28,705,272,000 28,760,726,000 28,684,201,000 28,684,201,000 28,564,498,000 28,314,985,000 14,132,745,000  14,005,454,000  
      diluted
                                                                                                            59,953,574,000      60,221,587,000  61,847,265,000  30,039,736,000 29,747,964,000 29,826,457,000 29,685,489,000 29,685,489,000 29,508,662,000 28,863,334,000 14,347,765,000  14,261,734,000  
      other charges
                                                                                                                                 
      depreciation
                                                                                                                                3,434,000 
      transaction costs
                                                                                                                                 
    Balance Sheets:
    Quarterly
    Annual
      Unit: USD2025-09-30 2025-06-30 2025-06-18 2025-03-31 2025-03-05 2024-12-31 2024-09-30 2024-06-30 2023-12-31 2023-09-30 2023-04-26 2023-02-22 2022-12-31 2022-11-02 2022-07-27 2022-02-22 2021-12-31 2021-11-03 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-06-09 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-06-12 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-06-23 2017-04-27 2017-03-31 2016-12-31 2016-12-19 2016-09-30 2016-06-30 2016-06-10 2016-03-31 2015-12-31 2015-09-30 2015-07-31 2015-06-30 2015-03-31 2014-12-31 2014-10-23 2014-09-30 2014-06-30 2014-06-19 2014-03-31 2013-12-31 2013-11-07 2013-06-30 2013-03-31 2012-12-31 2012-07-25 2011-12-31 2011-11-10 2011-09-30 2011-07-18 2011-06-30 2011-03-31 2010-12-31 2010-11-02 2010-09-30 2010-09-20 2010-07-28 2010-03-31 2009-12-31 2009-10-27 2009-09-30 2009-07-29 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 2006-12-31 2006-06-30 2006-03-31 2005-12-31 2005-05-31 
                                                                                                     
        assets
                                                                                                     
        current assets:
                                                                                                     
        cash and cash equivalents
      468,888,000 390,396,000 2,889 526,698,000 250,642 538,785,000 695,507,000 506,553,000 378,102,000 313,065,000 279,880,000 288,768,000 288,768,000 609,158,000 614,918,000 752,213,000 752,213,000 1,008,524,000 1,008,524,000 1,055,496,000 942,455,000 840,305,000 707,995,000 592,100,000 520,309 482,372,000 520,309,000 417,604,000 370,208,000 417,638,000 395,851 426,221,000 289,219,000 282,859 272,001,000 282,859,000 209,805,000 228,254,000 192,541 237,299,000 237,299,000 192,541,000 1,169 219,308,000 168,470,000 103,911 161,337,000 103,911,000 235,248,000 81,951 107,469,000 95,241,000 118,900,000 153,576,000 153,576,000 81,313,000 182,519 236,656,000 182,519,000 156,459,000 98,267,000 137,377,000 114,047,000 94,922,000 119,237,000 126,787,000 126,787,000 175,564,000 175,564,000 191,813,000 255,706,000 231,289,000 231,289,000 220,762 220,762,000 169,484,000 144,801,000 68,180,000 68,180,000 53,381,000 53,381,000 70,816,000 58,378,000 92,428,000 71,663,000 81,222,000 76,881,000 69,499,000 78,335,000 49,612,000 63,039,000 63,186,000 62,469,000 56,341,000 56,341,000 
        accounts receivable
      1,387,690,000 1,367,255,000  1,387,462,000  1,401,989,000 1,396,080,000 1,569,642,000 1,790,322,000 1,850,362,000 1,802,726,000 1,731,388,000 1,731,388,000 1,435,010,000 1,357,268,000 1,342,770,000 1,342,770,000 1,338,326,000 1,338,326,000 677,247,000 659,710,000 715,271,000 510,636,000 473,020,000 527,708 525,642,000 527,708,000 407,814,000 431,981,000 415,341,000 414,791 373,264,000 404,572,000 379,501 393,940,000 379,501,000 344,898,000 359,899,000 416,229 340,540,000 340,540,000 416,229,000  403,667,000 366,903,000 409,165 362,322,000 409,165,000 386,590,000  358,008,000 361,780,000 370,956,000 372,953,000 372,953,000 382,924,000 342,581 337,600,000  360,129,000 305,805,000 261,062,000  228,215,000  196,810,000 196,810,000 171,014,000 171,014,000 188,097,000 164,907,000 174,375,000 174,375,000 157,303 157,303,000 183,445,000 191,924,000 191,962,000 191,962,000 208,461,000 208,461,000 222,564,000 210,535,000 179,553,000 221,480,000 182,672,000 129,865,000 136,696,000 105,983,000 110,211,000 108,216,000 81,233,000 78,648,000 80,486,000 80,486,000 
        unbilled revenue
      1,258,706,000 1,244,560,000  1,197,080,000  1,286,274,000 1,361,198,000 1,230,948,000 951,936,000 941,884,000 974,260,000 957,655,000 957,655,000 894,291,000 709,477,000 623,121,000 623,121,000 550,692,000 550,692,000 415,390,000 416,352,000 428,684,000 440,379,000 410,397,000 422,769 446,465,000 422,769,000 493,114,000 491,848,000 440,583,000 362,926 338,523,000 274,501,000 268,509 292,688,000 268,509,000 255,349,000 249,234,000 192,687 226,152,000 226,152,000 192,687,000  196,863,000 190,025,000 173,649 238,645,000 173,649,000 195,646,000  173,614,000 156,595,000 146,163,000 140,429,000 140,429,000 139,739,000 113,239 116,653,000  119,766,000 140,145,000 115,431,000  115,407,000  133,211,000 133,211,000 143,323,000 143,323,000 121,998,000 101,431,000 97,218,000 97,218,000 86,631 86,631,000 92,480,000 92,080,000 118,398,000 118,398,000 114,028,000 114,028,000 122,757,000 141,727,000 138,864,000 146,152,000 161,120,000 144,661,000 123,823,000 104,740,000 90,065,000 89,977,000 69,379,000 63,313,000 56,762,000 56,762,000 
        other receivables
      91,018,000 80,637,000  87,490,000  79,487,000 82,760,000 78,113,000 65,797,000 121,687,000 143,727,000 63,658,000 63,658,000 60,251,000 63,838,000 56,760,000 56,760,000 60,376,000 60,376,000 32,289,000 31,552,000 35,394,000 32,583,000 34,456,000  32,502,000 39,290,000 39,795,000 39,956,000 40,079,000  38,501,000 48,068,000  49,563,000 33,798,000 40,883,000 39,146,000  35,800,000 35,800,000 32,044,000  42,718,000 39,097,000  34,566,000 30,935,000 27,349,000  21,477,000 19,813,000 17,491,000 15,077,000 15,077,000 14,572,000  13,175,000  12,181,000 15,691,000 18,298,000  12,384,000  16,370,000 16,370,000 17,643,000 17,643,000 14,307,000 12,451,000 12,856,000 12,856,000  12,614,000 12,851,000 13,016,000 7,232,000 7,232,000 11,230,000 11,230,000 11,334,000 11,196,000 13,243,000 9,779,000 7,133,000 6,171,000 11,553,000 9,533,000 9,381,000 7,468,000 5,092,000 6,559,000 5,662,000 5,662,000 
        prepayments and other current assets
      140,713,000 143,263,000  153,340,000  140,435,000 140,536,000 139,244,000 132,105,000 150,193,000 170,167,000 137,094,000 137,094,000 129,218,000 130,977,000 114,323,000 114,323,000 131,554,000 131,554,000 71,200,000 87,273,000 53,477,000 42,950,000 38,108,000  41,981,000 41,517,000 43,466,000 41,010,000 39,757,000  42,314,000 24,038,000  45,538,000 34,377,000 42,185,000 39,080,000  37,760,000 37,760,000 35,170,000  39,339,000 37,180,000  34,653,000 37,822,000 39,931,000  37,535,000 30,628,000 28,465,000 33,060,000 33,060,000 32,176,000  29,888,000  29,742,000 28,027,000 22,402,000  20,120,000  25,115,000 25,115,000 22,573,000 22,573,000 21,036,000 20,592,000 24,828,000 24,828,000  22,569,000 22,051,000 20,126,000 29,708,000 29,708,000 26,394,000 26,394,000 27,991,000 24,332,000 21,624,000 21,778,000 21,214,000 16,449,000 16,642,000 15,265,000 16,549,000 14,335,000 13,480,000 12,777,000 10,717,000 10,717,000 
        income taxes receivable
      61,626,000 83,292,000  63,969,000  83,523,000 102,931,000 79,216,000 91,254,000 42,039,000 56,820,000 48,790,000 48,790,000 41,935,000 52,132,000 50,299,000 50,299,000 38,484,000 38,484,000 32,037,000 29,996,000 28,118,000 34,784,000 28,589,000  24,866,000 23,759,000 24,564,000 31,034,000 26,828,000  21,457,000 24,475,000  28,232,000 24,385,000 26,230,000 23,188,000  22,988,000 22,988,000 21,241,000  22,443,000 24,832,000  20,436,000 22,961,000 19,220,000  19,174,000 16,009,000 15,716,000 24,137,000 24,137,000 32,661,000  12,849,000  12,975,000 14,539,000 16,645,000  6,363,000  16,378,000 16,378,000 17,969,000 17,969,000 9,124,000 18,966,000 20,330,000 20,330,000  18,188,000 15,132,000 14,627,000 2,234,000 2,234,000 5,118,000 5,118,000 2,960,000 5,776,000 685,000 806,000 623,000 2,448,000 583,000        
        total current assets
      3,408,641,000 3,309,403,000 435,342 3,416,039,000 483,211 3,530,493,000 3,779,012,000 3,603,716,000 3,411,470,000 3,421,184,000 3,429,233,000 3,229,066,000 3,229,066,000 3,171,575,000 2,930,322,000 2,941,198,000 2,941,198,000 3,129,668,000 3,129,668,000 2,285,388,000 2,169,067,000 2,102,978,000 1,771,056,000 1,578,398,000 1,634,909 1,555,555,000 1,624,980,000 1,479,993,000 1,467,108,000 1,440,525,000 1,343,954 1,305,541,000 1,148,650,000 1,112,432 1,163,503,000 1,101,018,000 1,002,023,000 1,025,465,000 964,423 982,206,000 982,206,000 957,958,000 154,230 1,008,750,000 908,988,000 868,636 938,479,000 864,433,000 1,017,028,000 480,677 832,347,000 811,592,000 819,507,000 859,903,000 859,903,000 798,097,000 844,381 905,702,000  775,378,000 709,541,000 655,738,000  569,021,000  567,648,000 567,648,000 595,786,000 595,786,000 595,064,000 579,676,000 569,494,000 569,494,000 513,870 528,625,000 536,035,000 535,426,000 535,177,000 535,177,000 522,300,000 522,300,000 492,237,000 500,279,000 495,465,000 523,295,000 492,422,000 423,146,000 391,876,000 347,147,000 319,995,000 328,885,000 271,723,000 248,494,000 234,639,000 234,639,000 
        non-current assets:
                                                                                                     
        property, plant and equipment
      390,837,000 377,979,000 524 378,253,000 509 382,879,000 365,726,000 353,844,000 361,184,000 342,262,000 348,106,000 350,320,000 350,320,000 315,524,000 313,110,000 336,444,000 336,444,000 319,457,000 319,457,000 166,244,000 165,582,000 174,343,000 160,075,000 162,552,000 104,257 162,840,000 165,087,000 156,305,000 156,231,000 154,753,000 103,710 154,548,000 155,020,000 105,100 161,060,000 163,051,000 152,305,000 149,618,000 93,482 148,644,000 148,644,000 148,967,000 389 151,375,000 150,987,000 98,389 149,886,000 150,218,000 148,835,000 404 147,310,000 141,552,000 148,185,000 154,748,000 154,748,000 160,170,000 120,624 157,187,000  162,822,000 162,280,000 162,629,000  161,874,000  172,203,000 172,203,000 175,132,000 175,132,000 175,552,000 170,861,000 172,883,000 172,883,000 136,473 162,875,000 172,412,000 178,989,000 182,542,000 182,542,000 175,046,000 175,046,000 165,970,000 171,748,000 165,227,000 165,183,000 153,708,000 133,426,000 109,952,000 91,240,000 77,231,000 68,208,000 52,974,000 49,279,000 45,286,000 45,286,000 
        goodwill
      8,927,323,000 9,092,410,000  9,065,335,000  9,051,410,000 9,085,447,000 9,016,549,000 9,022,075,000 8,982,896,000 8,979,134,000 8,971,670,000 8,971,670,000 8,942,525,000 8,970,283,000 9,037,931,000 9,037,931,000 8,935,212,000 8,935,212,000 933,387,000 927,738,000 936,257,000 914,413,000 901,245,000  893,033,000 883,170,000 877,017,000 854,741,000 787,393,000  760,884,000 759,137,000  776,469,000 769,058,000 764,377,000 625,518,000  617,813,000 617,813,000 616,088,000  626,657,000 590,428,000  593,885,000 588,434,000 575,378,000  578,036,000 571,523,000 463,324,000 498,121,000 498,121,000 507,238,000  357,356,000  360,648,000 354,579,000 354,175,000  319,097,000  282,948,000 282,948,000 219,611,000 219,611,000 220,217,000 175,860,000 176,715,000 176,715,000  169,596,000 168,739,000 173,568,000 176,144,000 176,144,000 173,394,000 173,394,000 166,723,000 169,344,000 130,318,000 141,199,000 139,086,000 123,879,000 124,353,000 79,402,000 78,795,000 78,717,000 67,395,000 66,050,000 67,440,000 67,440,000 
        intangible assets
      3,384,322,000 3,443,096,000 13 3,501,307,000 14 3,559,792,000 3,605,814,000 3,632,354,000 3,855,865,000 3,934,673,000 4,164,410,000 4,278,659,000 4,278,659,000 4,391,699,000 4,508,453,000 4,710,843,000 4,710,843,000 4,815,184,000 4,815,184,000 57,070,000 60,598,000 66,460,000 69,368,000 72,748,000  78,662,000 67,894,000 66,286,000 74,264,000 57,665,000  54,162,000 60,374,000  67,061,000 71,628,000 73,722,000 48,484,000  52,248,000 52,248,000 56,610,000 114 63,557,000 57,581,000  61,610,000 66,127,000 38,841,000 152 41,908,000 44,587,000 49,719,000 25,249,000 25,249,000 27,694,000  29,451,000  30,097,000 30,974,000 32,174,000  24,445,000  6,706,000 6,706,000 7,230,000 7,230,000 7,760,000 8,278,000 8,122,000 8,122,000  8,642,000 9,162,000 9,960,000     10,047,000 10,624,000   1,787,000 1,795,000     52,000 85,000 188,000 188,000 
        operating right-of-use assets
      134,341,000 140,352,000  147,377,000  147,602,000 156,955,000 149,782,000 140,333,000 132,319,000 150,495,000 153,832,000 153,832,000 137,000,000 160,417,000 198,123,000 198,123,000 238,107,000 238,107,000 69,238,000 74,801,000 84,561,000 85,653,000 86,267,000  99,251,000 104,977,000 107,681,000 109,007,000 111,775,000                                                                  
        deferred tax asset
      100,810,000 86,275,000 306 77,404,000 388 74,758,000 75,993,000 74,787,000 73,662,000 83,095,000 89,406,000 76,930,000 76,930,000 62,298,000 54,051,000 48,392,000 48,392,000                          519      31,305,000 531 30,343,000 35,092,000 24,716,000 25,635,000 25,635,000 20,653,000  32,016,000  21,987,000 21,431,000 21,394,000  18,494,000  13,677,000 13,677,000 7,700,000 7,700,000 8,689,000 5,623,000 8,598,000 8,598,000  10,558,000 10,332,000 9,625,000 12,771,000 12,771,000 9,765,000 9,765,000 7,633,000 5,609,000 6,342,000 8,911,000 8,695,000 4,919,000 4,373,000 4,584,000 4,355,000 6,028,000 1,526,000 1,919,000 2,637,000 2,637,000 
        investments in equity
      71,284,000 67,743,000  62,160,000  57,948,000 53,720,000                                                                                         
        total assets
      16,507,490,000 16,602,290,000 7,619,886 16,722,997,000 7,614,751 16,877,678,000 17,211,112,000 16,968,861,000 16,989,863,000 17,031,497,000 17,286,524,000 17,185,278,000 17,185,278,000 17,125,813,000 17,036,332,000 17,387,090,000 17,387,090,000 17,654,517,000 17,654,517,000 3,584,464,000 3,466,576,000 3,435,606,000 3,065,298,000 2,858,720,000 2,938,580 2,841,332,000 2,907,512,000 2,745,186,000 2,719,096,000 2,607,258,000 2,386,353 2,325,728,000 2,174,496,000 2,185,874 2,219,445,000 2,146,618,000 2,053,349,000 1,904,310,000 1,858,136 1,855,215,000 1,855,215,000 1,825,843,000 511,105 1,900,478,000 1,750,240,000 1,751,241 1,796,135,000 1,718,903,000 1,812,792,000 882,501 1,636,254,000 1,604,901,000 1,528,850,000 1,572,726,000 1,572,726,000 1,525,740,000 1,450,741 1,484,541,000 1,442,460,000 1,362,068,000 1,293,122,000 1,231,220,000 1,202,108,000 1,104,894,000 1,035,467,000 1,045,655,000 1,045,655,000 1,014,249,000 1,014,249,000 1,013,685,000 949,538,000 937,857,000 937,857,000 888,541 882,356,000 897,101,000 908,398,000 922,140,000 922,140,000 897,478,000 897,478,000 850,536,000 867,285,000 808,656,000 843,968,000 797,880,000 693,138,000 631,780,000 521,929,000 476,131,000 476,341,000 392,566,000 364,458,000 347,553,000 347,553,000 
        liabilities and shareholders’ equity
                                                                                                     
        current liabilities:
                                                                                                     
        accounts payable
      113,288,000 94,503,000 87 118,168,000 87 173,025,000 106,172,000 83,037,000 131,584,000 87,317,000 85,126,000 81,194,000 81,194,000 60,851,000 77,648,000 90,764,000 90,764,000 62,576,000 62,576,000 37,818,000 48,103,000 51,113,000 28,702,000 32,722,000 24,050 23,332,000 24,050,000 20,764,000 20,226,000 19,304,000 13,288 15,306,000 15,123,000 18,590 11,850,000 18,590,000 12,992,000 7,861,000 8,696 13,591,000 13,591,000 8,696,000 91 5,053,000 6,123,000 7,021 5,647,000 7,021,000 4,528,000 158 6,304,000 3,859,000 2,793,000 5,913,000 5,913,000 10,903,000 4,597 6,664,000  8,853,000 11,806,000 6,793,000  8,068,000  6,522,000 6,522,000 4,291,000 4,291,000 8,607,000 12,314,000 8,569,000 8,569,000 7,218 7,218,000 8,335,000 12,123,000 7,377,000 7,377,000 8,919,000 8,919,000 9,726,000 17,505,000 12,344,000 13,233,000 13,645,000 13,459,000 13,560,000 11,283,000 11,967,000 9,691,000 9,262,000 10,252,000 10,379,000 10,379,000 
        unearned revenue
      1,528,343,000 1,514,442,000  1,497,166,000  1,614,758,000 1,585,257,000 1,602,526,000 1,654,507,000 1,663,183,000 1,580,235,000 1,507,449,000 1,507,449,000 1,395,160,000 1,191,778,000 1,323,961,000 1,323,961,000 1,349,000,000 1,349,000,000 675,234,000 610,477,000 660,883,000 450,906,000 393,217,000 366,988 386,242,000 366,988,000                                                                     
        other liabilities
      998,472,000 898,909,000  994,308,000  923,603,000 1,045,134,000 999,071,000 915,399,000 948,829,000 1,029,893,000 1,005,025,000 1,005,025,000 1,147,142,000 1,118,975,000 949,629,000 949,629,000 794,879,000 794,879,000 382,593,000 404,988,000 399,769,000 402,018,000 385,036,000  435,862,000 378,543,000 370,725,000 357,645,000 363,787,000  216,959,000 192,339,000  260,998,000 233,503,000 236,090,000 197,254,000  213,611,000 213,611,000 190,727,000  188,207,000 178,941,000  224,221,000 231,879,000 239,556,000  224,040,000 273,902,000 251,091,000 225,602,000 225,602,000 194,728,000  219,798,000  180,298,000 166,579,000 191,536,000  159,710,000  143,684,000 143,684,000 122,007,000 122,007,000 136,874,000 100,182,000 107,357,000 107,357,000  96,528,000 100,243,000 119,666,000 120,148,000 120,148,000 113,209,000 113,209,000 94,361,000 130,223,000 101,315,000 78,098,000 66,576,000 70,743,000 66,591,000 47,446,000 46,025,000 51,956,000 35,911,000 31,327,000 39,890,000 39,890,000 
        income taxes payable
      49,350,000 19,347,000  49,888,000  55,258,000 52,585,000 27,935,000 13,968,000 41,518,000 68,676,000 41,783,000 41,783,000 72,580,000 38,223,000 59,433,000 59,433,000 39,614,000 39,614,000 9,396,000 16,666,000 12,178,000 11,506,000 9,190,000  14,059,000 12,031,000 15,264,000 9,462,000 10,885,000  16,239,000 14,049,000  22,962,000 14,973,000 16,677,000 20,393,000  21,638,000 21,638,000 22,226,000  13,868,000 14,337,000  17,775,000 14,203,000 20,608,000  12,830,000 7,506,000 4,149,000 10,598,000 10,598,000 6,201,000  3,546,000  3,956,000 5,608,000 7,283,000  7,859,000  1,685,000 1,685,000 1,029,000 1,029,000 1,520,000 2,634,000 2,583,000 2,583,000  2,009,000 2,565,000 1,782,000 15,553,000 15,553,000 9,507,000 9,507,000 4,637,000 3,110,000 4,708,000 5,018,000 5,579,000 4,955,000 18,832,000 14,423,000 11,448,000 10,985,000 7,260,000 8,757,000 6,189,000 6,189,000 
        current bank credit lines, loan facilities and notes
      529,762,000 29,762,000  29,762,000  29,762,000 29,762,000 29,762,000                                                                                        
        total current liabilities
      3,219,215,000 2,556,963,000 19,528 2,689,292,000 22,387 2,796,406,000 2,818,910,000 2,742,331,000 2,825,608,000 2,870,997,000 2,899,080,000 2,690,601,000 2,690,601,000 2,730,883,000 2,481,774,000 2,478,937,000 2,478,937,000 2,301,219,000 2,301,219,000 1,105,041,000 1,080,234,000 1,123,943,000 1,243,055,000 1,169,993,000 1,192,778 1,209,229,000 1,131,252,000 728,979,000 708,817,000 712,274,000 628,174 602,140,000 548,252,000 580,937 628,163,000 566,058,000 527,262,000 486,992,000 501,805 515,544,000 515,544,000 494,406,000 14,136 457,961,000 456,915,000 586,463 565,704,000 571,800,000 909,651,000 13,563 571,862,000 558,544,000 538,359,000 536,176,000 536,176,000 502,586,000 506,491 499,779,000  475,669,000 456,034,000 427,398,000  371,432,000  290,570,000 290,570,000 271,007,000 271,007,000 291,011,000 250,326,000 263,016,000 263,016,000 265,154 248,503,000 275,482,000 299,520,000 319,519,000 319,519,000 324,827,000 324,827,000 283,138,000 314,322,000 290,710,000 321,433,000 302,617,000 229,875,000 263,931,000 177,403,000 152,279,000 168,564,000 118,462,000 106,095,000 109,351,000 109,351,000 
        non-current liabilities:
                                                                                                     
        non-current bank credit lines, loan facilities and notes
      2,878,547,000 3,384,488,000  3,390,438,000  3,396,398,000 3,402,368,000 3,408,157,000                                                                                        
        lease liabilities
      125,110,000 132,713,000  138,354,000  140,085,000 145,714,000 145,464,000 126,321,000 121,424,000 133,048,000 131,644,000 131,644,000 126,482,000 147,300,000                                                                                 
        non-current other liabilities
      99,490,000 97,057,000  85,713,000  83,470,000 50,157,000 48,372,000 45,998,000 41,661,000 46,177,000 38,260,000 38,260,000 41,888,000 38,223,000 41,861,000 41,861,000 73,917,000 73,917,000 26,541,000 26,279,000 26,366,000 21,149,000 21,662,000 17,899 16,069,000 17,512,000 14,420,000 14,580,000 14,128,000 13,022 16,670,000 16,179,000 17,645 15,787,000 17,111,000 21,036,000 19,233,000 18,639 24,821,000 24,821,000 23,752,000  22,317,000 14,309,000 13,183 13,715,000 12,224,000 15,445,000  15,748,000 15,389,000 13,179,000 8,149,000 8,149,000 7,717,000 12,557 6,978,000  11,990,000 11,892,000 14,318,000  24,230,000  32,399,000 32,399,000 4,468,000 4,468,000 3,857,000 3,676,000 3,153,000 3,153,000 3,158 3,155,000 3,088,000 2,844,000 2,444,000 2,444,000 2,080,000 2,080,000 1,712,000 1,410,000 1,626,000 1,570,000 1,451,000 1,394,000         
        non-current income taxes payable
      105,832,000 100,916,000  129,529,000  125,834,000 201,135,000 195,778,000 186,654,000 242,972,000 243,813,000 239,188,000 239,188,000 218,644,000 216,942,000 172,109,000 172,109,000 18,868,000 18,868,000 13,262,000 14,466,000 14,539,000 13,849,000 13,351,000  15,275,000 14,301,000 17,272,000 17,537,000 16,975,000  14,773,000 13,622,000  13,161,000 14,879,000 16,994,000 14,362,000  16,457,000 16,457,000 8,482,000  20,939,000 15,655,000  19,743,000 16,180,000 12,929,000  12,592,000 12,895,000 12,389,000 5,082,000 5,082,000 4,646,000  4,274,000  7,369,000 9,530,000 7,860,000  4,893,000  8,598,000 8,598,000 10,770,000 10,770,000 10,016,000 10,205,000 12,525,000 12,525,000  18,152,000 19,242,000 19,350,000 17,244,000 17,244,000 17,262,000 17,262,000 16,508,000 15,949,000 14,737,000 15,268,000 14,830,000 13,906,000         
        deferred tax liability
      744,450,000 775,066,000  788,816,000  812,486,000 818,329,000 843,633,000 899,100,000 883,887,000 957,019,000 988,585,000 988,585,000 974,339,000 1,015,580,000  1,085,976,000                                185,000  193,000 234,000 229,000       13,000 22,000 66,000  1,281,000  1,219,000 1,219,000 1,335,000 1,335,000 986,000 956,000 924,000 924,000  1,410,000 750,000 751,000 1,172,000 1,172,000 998,000 998,000 1,186,000 1,356,000 789,000 837,000 259,000 398,000 433,000 685,000 385,000 538,000 593,000 682,000 310,000 310,000 
        commitments and contingencies
                                                                                                     
        total liabilities
      7,172,644,000 7,047,203,000 25,401 7,222,142,000 27,966 7,354,679,000 7,436,613,000 7,383,735,000 7,749,120,000 8,072,463,000 8,632,671,000 8,687,315,000 8,687,315,000 8,887,092,000 8,890,319,000 9,320,263,000 9,320,263,000 9,685,931,000 9,685,931,000 1,556,521,000 1,532,405,000 1,585,370,000 1,354,182,000 1,280,237,000 1,296,971 1,327,480,000 1,249,947,000 1,208,046,000 1,190,223,000 1,185,073,000 999,974 991,244,000 935,748,000 955,618 1,014,450,000 955,618,000 925,795,000 874,718,000 880,669 910,706,000 910,706,000 880,669,000 14,136   954,111    13,563       521,191                 270,668              271,794,000 184,450,000 156,280,000  123,237,000 110,938,000   
        shareholders' equity:
                                                                                                     
        ordinary shares, par value 6 euro cents per share; 100,000,000 shares authorized,
                                                                                                     
        76,359,932 shares issued and outstanding at september 30, 2025 and
                                                                                                     
        80,756,860 shares issued and outstanding at december 31, 2024
      6,290,000 6,390,000  6,505,000                                                                                            
        additional paid-in capital
      7,100,059,000 7,054,324,000  7,037,344,000  7,020,231,000 7,011,547,000   6,924,073,000   6,840,306,000   6,733,910,000 6,733,910,000 6,700,407,000 6,700,407,000 632,069,000 623,409,000 617,104,000 610,240,000 592,500,000   577,961,000         481,337,000  462,674,000    438,207,000      383,395,000 372,614,000  355,700,000 343,320,000 327,234,000 316,630,000 316,630,000 302,480,000  294,296,000 279,572,000 266,082,000 253,323,000 244,644,000 237,217,000 220,829,000 211,549,000 206,703,000 206,703,000 203,658,000 203,658,000 199,950,000 196,960,000 193,494,000 193,494,000  188,972,000 181,569,000 174,188,000 168,290,000 168,290,000 166,091,000 166,091,000 163,975,000 162,057,000 160,244,000 159,957,000 152,217,000 146,355,000 143,059,000 140,816,000 137,742,000 133,996,000 129,443,000 126,135,000 114,447,000 114,447,000 
        other undenominated capital
      1,606,000 1,506,000 1,389 1,389,000 1,304 1,304,000 1,184,000 1,162,000 1,162,000 1,162,000 1,162,000 1,162,000 1,162,000 1,162,000 1,162,000 1,134,000 1,134,000 1,134,000 1,134,000 1,134,000 1,134,000 1,134,000 1,134,000 1,134,000 1,052 1,134,000 1,052,000 1,050,000 1,017,000 997,000 983 947,000 945,000 912 938,000 912,000 896,000 896,000 809 887,000 887,000                                                       
        accumulated other comprehensive loss
      -86,944,000 -68,763,000  -173,191,000  -229,929,000 -110,062,000 -179,559,000 -143,506,000 -190,190,000      -90,937,000  -79,196,000 -79,196,000                                                                             
        retained earnings
      2,313,835,000 2,561,630,000 1,168,788 2,628,808,000 1,167,498 2,724,807,000 2,865,127,000 2,768,067,000 2,433,719,000 2,217,301,000 1,938,038,000 1,821,384,000 1,821,384,000 1,703,938,000 1,543,784,000 1,416,080,000 1,416,080,000 1,339,612,000 1,339,612,000 1,433,882,000 1,360,017,000 1,262,895,000 1,161,661,000 1,070,020,000 1,220,871 1,022,260,000 1,110,226,000 1,020,386,000 1,003,328,000 951,603,000 979,834 872,183,000 790,446,000 794,331 734,581,000 742,800,000 696,712,000 622,558,000 650,583 569,452,000 569,452,000 587,847,000 274,888 623,860,000 559,981,000 491,671 498,907,000 435,943,000 543,457,000 673,013 711,458,000 711,054,000 655,185,000 706,534,000 706,534,000 689,213,000 659,817 659,974,000  590,299,000 562,491,000 540,012,000  482,482,000  486,347,000 486,347,000 489,010,000 489,010,000 475,928,000 467,580,000 445,480,000 445,480,000 444,133 425,581,000 402,708,000 380,509,000 349,635,000 349,635,000 325,684,000 325,684,000 307,154,000 286,210,000 265,185,000 243,805,000 224,984,000 208,090,000 192,209,000 177,708,000 164,393,000 152,127,000 130,614,000 121,317,000 106,358,000 106,358,000 
        total shareholders' equity
      9,334,846,000 9,555,087,000  9,500,855,000  9,522,999,000 9,774,499,000 9,585,126,000 9,240,743,000 8,959,034,000 8,653,853,000 8,497,963,000 8,497,963,000 8,238,721,000 8,146,013,000 8,066,827,000  7,968,586,000 7,968,586,000 2,027,943,000 1,934,171,000  1,711,116,000 1,578,483,000  1,513,852,000  1,502,289,000 1,495,923,000 1,422,185,000  1,334,484,000 1,238,748,000  1,204,995,000 1,191,000,000 1,127,554,000 1,029,592,000  944,509,000 944,509,000 945,174,000  991,860,000 909,969,000  843,685,000  863,266,000  1,022,212,000 999,269,000  1,011,158,000 1,011,158,000 998,333,000  960,785,000  854,519,000 801,708,000 767,932,000  683,601,000  697,442,000 697,442,000 711,800,000 711,800,000 693,119,000  647,163,000 647,163,000  598,127,000 584,981,000  540,854,000 540,854,000 507,924,000 507,924,000 474,391,000  452,077,000 447,157,000 421,033,000  359,986,000 337,479,000 319,851,000  269,329,000    
        total liabilities and shareholders' equity
      16,507,490,000 16,602,290,000  16,722,997,000   17,211,112,000 16,968,861,000 16,989,863,000 17,031,497,000      17,387,090,000  17,654,517,000 17,654,517,000 3,584,464,000 3,466,576,000         2,607,258,000  2,325,728,000 2,174,496,000  2,219,445,000 2,146,618,000 2,053,349,000 1,904,310,000  1,855,215,000 1,855,215,000 1,825,843,000  1,900,478,000 1,750,240,000  1,796,135,000  1,812,792,000  1,636,254,000 1,604,901,000  1,572,726,000 1,572,726,000 1,525,740,000  1,484,541,000  1,362,068,000 1,293,122,000 1,231,220,000  1,104,894,000  1,045,655,000 1,045,655,000 1,014,249,000 1,014,249,000 1,013,685,000  937,857,000 937,857,000  882,356,000 897,101,000  922,140,000 922,140,000 897,478,000 897,478,000 850,536,000  808,656,000 843,968,000 797,880,000  631,780,000 521,929,000 476,131,000  392,566,000    
        77,772,130 shares issued and outstanding at june 30, 2025 and
                                                                                                     
        non-current assets
                                                                                                     
        right-of-use assets
        5,812  5,628                    103,962                                                                       
        investment in subsidiaries
        7,167,037  7,125,001                                      355,853       400,737                                              
        amounts due from subsidiary undertakings
        10,852  231,912                                      149,989       395,048                                              
        total non-current assets
        7,184,544  7,131,540                    1,303,671      1,042,399   1,073,442     893,713    356,875   882,605    401,824       606,360                 374,671                      
        current assets
                                                                                                     
        other current assets
        1,050  657                    70,325      68,734   58,957     58,562    3,056   59,780    3,678       31,306                 24,972                      
        equity
                                                                                                     
        share capital
        6,506  6,589                    4,635      4,658   4,664     4,692    4,679   4,679    5,008       5,168                 5,031                      
        share premium
        565,697  561,626                    305,228      283,629   266,852     252,977    242,904   242,904    232,956       199,785                 151,420                      
        merger reserve
        5,656,195  5,656,195                                                                                       47,000 47,000 47,000 47,000 
        share-based payment reserve
        280,849  279,349                    174,230      173,326   187,840         83,781                                                     
        other reserve
        27,405  27,405                                                                                           
        foreign currency reserve
        -112,344  -113,181                                                                                           
        total equity attributable to equity holders
        7,594,485  7,586,785                                         797,130           929,550                                       
        liabilities
                                                                                                     
        non-current liabilities
                                                                                                     
        non-current lease liabilities
        5,873  5,579                    76,593                                                                       
        total non-current liabilities
        5,873  5,579                    104,193      371,800   374,681     378,864       367,648           14,700                 5,514                      
        current liabilities
                                                                                                     
        amounts due to subsidiary undertakings
        544  3,744                                                                                           
        accrued and other liabilities
        7,389  7,870                    422,036      309,943   230,321     188,295    13,643   229,764    13,076       189,167                 96,437                      
        current taxes payable
        11,508  10,686                                      402       329                                              
        total equity and liabilities
        7,619,886  7,614,751                          2,386,353   2,185,874     1,858,136    511,105   1,751,241    882,501       1,450,741                 888,541                      
        79,464,252 shares issued and outstanding at march 31, 2025 and
                                                                                                     
        other non-current asset
                                                                                                     
        available for sale investments
              1,954,000 1,954,000 1,653,000 1,713,000 1,713,000 1,712,000 1,712,000 1,712,000 1,712,000 1,712,000 1,712,000 1,729,000 1,729,000 1,729,000 1,729,000 1,728,000  1,727,000 49,628,000 53,636,000 61,071,000 60,299,000                                                                  
        ordinary shares, par value 6 euro cents per share;100,000,000 shares authorized (note 18),
                                                                                                     
        80,756,860 shares issued and outstanding at december 31, 2024 and 82,495,086 shares issued and outstanding at december 31, 2023.
           6,586,000                                                                                          
        total liabilities and shareholders’ equity
           16,877,678,000       17,185,278,000    17,387,090,000                               1,718,903,000     1,528,850,000                  949,538,000      908,398,000      867,285,000    693,138,000    476,341,000  364,458,000 347,553,000 347,553,000 
        82,559,366 shares issued and outstanding at september 30, 2024 and
                                                                                                     
        82,495,086 shares issued and outstanding at december 31, 2023
            6,703,000 6,720,000                                                                                        
        investments in equity- long term
             50,220,000 46,804,000 41,790,000 32,052,000 32,631,000  27,932,000 26,891,000                                                                                 
        82,816,600 shares issued and outstanding at june 30, 2024 and
                                                                                                     
        additional paid‑in capital
             6,988,736,000 6,942,669,000  6,867,887,000 6,840,306,000  6,818,877,000 6,787,365,000           584,852,000  571,721,000 559,583,000 540,020,000  521,191,000 508,195,000  491,338,000  471,721,000   449,678,000 449,678,000   427,120,000 408,588,000  398,361,000                                                 
        current bank credit lines and loan facilities
              110,150,000 130,150,000 135,150,000 55,150,000 55,150,000 55,150,000 55,150,000 55,150,000 55,150,000 55,150,000 55,150,000    349,923,000 349,828,000 349,640 349,734,000 349,640,000                                                                     
        non-current bank credit lines and loan facilities
              3,665,439,000 3,911,522,000 4,353,534,000 4,599,037,000 4,599,037,000 4,794,856,000 4,990,500,000 5,381,162,000 5,381,162,000 5,872,720,000 5,872,720,000 350,000,000 348,592,000 348,477,000      349,542,000 349,451,000 349,357,000 349,264 349,169,000 349,074,000 348,888 348,980,000 348,888,000 348,793,000 348,698,000 348,511 348,604,000 348,604,000 348,511,000  401,417,000 348,322,000 348,304 348,278,000 350,000,000                                  60,972,000    48,394,000          
        82,495,086 shares issued and outstanding at december 31, 2023 and 81,723,555 shares issued and outstanding at december 31, 2022.
              6,699,000                                                                                       
        82,326,976 shares issued and outstanding at september 30, 2023 and
                                                                                                     
        81,723,555 shares issued and outstanding at december 31, 2022
               6,688,000                                                                                      
        81,928,422 shares issued and outstanding at march 31, 2023 and 81,723,555 shares issued and outstanding at december 31, 2022.
                6,662,000                                                                                     
        accumulated other comprehensive income
                -159,896,000 -171,538,000 -171,538,000 -291,901,000 -192,935,000  -90,937,000   -43,734,000 -54,974,000 -35,477,000 -66,498,000 -89,740,000             -46,444,000 -61,198,000  -80,152,000 -80,152,000 -86,300,000  -64,532,000 -64,000,000  -58,980,000 -61,636,000 -58,193,000  -50,317,000 -60,469,000 -37,555,000 -17,336,000 -17,336,000 1,331,000  1,214,000  -7,098,000 -19,315,000 -21,912,000  -24,831,000  -693,000 -693,000 14,053,000 14,053,000 12,171,000 396,000 3,139,000 3,139,000  -21,457,000 -4,297,000 12,584,000 17,996,000 17,996,000 11,220,000 11,220,000  3,178,000 21,730,000 41,237,000 41,693,000 31,828,000 22,600,000 16,838,000 15,606,000 14,515,000 8,220,000 5,023,000 11,229,000 11,229,000 
        total liabilities and equity
                17,286,524,000 17,185,278,000  17,125,813,000 17,036,332,000                                                                                 
        equity method investments
                    731,000 2,373,000 2,373,000 3,062,000 3,062,000 3,751,000 4,260,000 4,534,000 4,817,000                                                                         
        81,723,555 shares issued and outstanding at december 31, 2022 and 81,554,683 shares issued and outstanding at december 31, 2021.
                 6,649,000 6,649,000                                                                                   
        investments in equity-long term
                  32,631,000   22,592,000 22,592,000 22,758,000 22,758,000 22,286,000 18,614,000 15,765,000 12,990,000 11,326,000  10,040,000 10,053,000 10,939,000 10,768,000                                                                   
        ordinary shares par value 6 euro cents per share;100,000,000 shares authorized
                                                                                                     
        81,645,279 shares issued and outstanding at september 30, 2022 and
                                                                                                     
        81,554,683 shares issued and outstanding at december 31, 2021
                   6,645,000                                                                                  
        other assets:
                                                                                                     
        other non-current assets
                     70,557,000 70,557,000 57,637,000 57,637,000 22,445,000 21,309,000 20,773,000 17,920,000 16,939,000 24,741 14,934,000 17,439,000 16,514,000 16,456,000 18,906,000 20,778 15,694,000 15,715,000 22,364 15,610,000 15,393,000   20,054       17,049           12,307                 8,384                      
        non-current income taxes receivable
                     18,637,000 18,637,000 16,119,000 16,119,000 12,373,000 12,055,000 17,230,000 14,825,000 13,451,000  12,090,000 17,230,000 15,551,000 15,176,000 13,822,000  18,977,000 18,180,000  17,530,000 18,396,000 16,451,000 13,473,000  9,975,000 9,975,000 12,698,000  12,577,000 10,206,000  12,439,000 11,362,000 14,673,000  17,003,000 13,022,000 15,060,000 14,354,000 14,354,000 13,527,000  20,013,000  20,520,000 23,660,000 15,349,000  14,328,000  291,000 291,000 475,000 475,000 475,000 482,000 482,000 482,000  483,000 482,000 483,000 5,507,000 5,507,000 5,148,000 5,148,000 4,943,000 4,840,000 4,552,000 3,299,000 3,140,000 3,049,000         
        other liabilities:
                                                                                                     
        non-current operating lease liabilities
                     159,483,000 159,483,000 190,912,000 190,912,000 47,334,000 52,182,000 60,801,000 62,494,000 63,974,000  74,759,000 76,593,000 79,410,000 79,570,000 83,165,000                                                                  
        non-current government grants
                     735,000 735,000 760,000 760,000 795,000 795,000 838,000 812,000 792,000  789,000 813,000 803,000 847,000 847,000  902,000 908,000  977,000 966,000 960,000 943,000  890,000 890,000 887,000  958,000 959,000  978,000 959,000 1,002,000  1,011,000 993,000 1,116,000 1,189,000 1,189,000 1,282,000  1,327,000  1,311,000 1,295,000 1,326,000  1,271,000  1,152,000 1,152,000 1,500,000 1,500,000 1,514,000 1,470,000 1,509,000 1,509,000  1,376,000 1,611,000 1,750,000                   
        non-current deferred tax liability
                     1,085,976,000  1,227,535,000 1,227,535,000 13,548,000 9,857,000 10,406,000 12,823,000 10,465,000  11,359,000 9,476,000 17,620,000 19,421,000 8,327,000  7,590,000 7,713,000  7,382,000 7,716,000 10,750,000 4,490,000  4,390,000 4,390,000 4,631,000  5,026,000 4,111,000  4,032,000 4,644,000 10,499,000  12,829,000 17,811,000 13,601,000 10,972,000 10,972,000 11,176,000  11,398,000  11,210,000 12,663,000 12,386,000  19,467,000  15,494,000 15,494,000 14,704,000 14,704,000 14,168,000 13,862,000 10,491,000 10,491,000  13,043,000 12,697,000 12,688,000 14,283,000 14,283,000 13,018,000 13,018,000 12,129,000 12,196,000 8,466,000 7,088,000 6,636,000 5,966,000 5,388,000 4,625,000 1,541,000 2,586,000 2,526,000 2,627,000 2,747,000 2,747,000 
        ordinary shares, par value 6 euro cents per share; 100,000,000 shares authorised,
                                                                                                     
        81,554,683 shares issued and outstanding at december 31, 2021 and
                                                                                                     
        52,788,093 shares issued and outstanding at december 31, 2020
                     6,640,000  6,629,000 6,629,000 4,592,000 4,585,000                                                                           
        liabilities and shareholders' equity
                                                                                                     
        ordinary shares par value 6 euro cents per share;100,000,000 shares authorized,
                                                                                                     
        81,554,683 shares issued and outstanding at december 31, 2021 and 52,788,093 shares issued and outstanding at december 31, 2020.
                      6,640,000                                                                               
        total shareholders’ equity
                      8,066,827,000     1,850,236,000     1,618,055,000                     763,096,000     950,206,000                  669,999,000      572,246,000      456,366,000    388,400,000    302,738,000  253,520,000 233,066,000 233,066,000 
        non-current deferred tax asset
                       117,313,000 117,313,000 12,282,000 12,552,000 12,705,000 14,181,000 15,794,000  14,927,000 16,682,000 14,900,000 15,345,000 12,937,000  15,922,000 17,420,000  18,212,000 8,074,000 29,374,000 27,135,000  29,929,000 29,929,000 19,691,000  23,895,000 18,744,000  26,755,000 26,738,000 6,766,000  7,408,000 9,792,000 21,472,000 9,983,000 9,983,000 9,514,000  7,459,000  6,175,000 5,657,000 5,080,000  10,893,000  11,148,000 11,148,000 11,477,000 11,477,000 10,145,000 10,028,000 6,359,000 6,359,000  8,427,000 6,592,000 6,890,000 10,604,000 10,604,000 9,175,000 9,175,000 8,165,000 8,271,000 7,499,000 7,150,000 5,464,000 5,703,000 5,599,000 4,140,000 110,000 531,000 422,000 550,000   
        81,397,821 shares issued and outstanding at september 30, 2021 and
                                                                                                     
        52,958,063 shares issued and outstanding at june 30, 2021 and
                                                                                                     
        52,858,190 shares issued and outstanding at march 31, 2021 and
                                                                                                     
        52,788,093 shares issued and outstanding at december 31, 2020 and 53,622,206 shares issued and outstanding at december 31, 2019.
                           4,580,000                                                                          
        redeemable noncontrolling interest
                                39,510,000 34,851,000 32,950,000                                                                   
        total shareholders' equity and redeemable noncontrolling interest
                           1,850,236,000 1,711,116,000 1,578,483,000  1,513,852,000 1,657,565,000 1,537,140,000 1,528,873,000                                                                   
        total liabilities and shareholders’ equity and redeemable noncontrolling interest
                           3,435,606,000     2,907,512,000                                                                     
        52,775,243 shares issued and outstanding at september 30, 2020 and
                                                                                                     
        53,622,206 shares issued and outstanding at december 31, 2019
                            4,579,000 4,569,000  4,561,000                                                                      
        total liabilities and shareholders' equity and redeemable noncontrolling interest
                            3,065,298,000 2,858,720,000  2,841,332,000                                                                      
        52,629,067 shares issued and outstanding at june 30, 2020 and
                                                                                                     
        intangible assets – goodwill and other
                              1,025,903      879,283   912,646     742,192       720,399           443,092                 218,562                      
        financial assets
                              10,053      6,963                                                                 
        deferred tax assets
                              34,755      31,665   33,332     37,985       46,768           30,337                 11,252                      
        inventories
                              3,181      2,274   2,236     2,419       1,818           2,198                 5,531                      
        current taxes receivable
                              40,989      39,468   42,781     33,939    16   34,323           34,221                 18,671                      
        current asset investments
                              49,628      59,910   77,589     68,046       85,990           138,317                                       
        other reserves
                              10,874      11,868   11,029     10,348    -109,998   11,340    6,071       8,068                 7,422                      
        foreign currency translation reserve
                              -71,492         -35,077     -83,809       -62,542           4,205                 -22,713                      
        current asset investments - fair value reserve
                              231                                                                       
        put option in noncontrolling interest shares
                              -38,482                                                                       
        total equity attributable to the owners of the company
                              1,607,147      1,386,379   1,230,256     977,467                                                         
        noncontrolling interest
                              34,462                                                                       
        total equity attributable to the owners of the company and noncontrolling interest
                              1,641,609                                                                       
        non-current provisions
                              405      1,301   432     7,083       1,518                                                  
        deferred tax liabilities
                              9,296      8,213   7,716     4,631       4,643           2,143                 980                      
        provisions
                              3,732      7,200   3,182     1,349       598           5,675                                       
        current tax payable
                              26,332      23,275   29,852     30,708       30,383           9,705                 20,161                      
        total equity attributable to the owners of the company and noncontrolling interest and liabilities
                              2,938,580                                                                       
        52,508,751 shares issued and outstanding at march 31, 2020 and
                                                                                                     
        53,622,206 shares issued and outstanding at december 31, 2019 and 53,971,706 shares issued and outstanding at december 31, 2018.
                                4,635,000                                                                     
        payments on account
                                 322,226,000 321,484,000 318,298,000 274,468 353,636,000 326,741,000 298,992 332,353,000 298,992,000 261,503,000 261,484,000 272,757 266,704,000 266,704,000 272,757,000  250,833,000 257,514,000 318,697 318,061,000 318,697,000 294,774,000  268,495,000 253,043,000 280,097,000 294,063,000 294,063,000 290,754,000 297,347 269,771,000  282,549,000 272,019,000 221,720,000  194,514,000  137,460,000 137,460,000 142,345,000 142,345,000 143,024,000 134,240,000 143,583,000 143,583,000 141,338 141,338,000 163,589,000 165,198,000 172,699,000 172,699,000 158,823,000 158,823,000 134,989,000 121,935,000 129,030,000 165,218,000 133,805,000 96,553,000 94,028,000 87,619,000 77,454,000 90,394,000 65,436,000 55,077,000 52,583,000 52,583,000 
        53,640,584 shares issued and outstanding at september 30, 2019 and
                                                                                                     
        53,971,706 shares issued and outstanding at december 31, 2018
                                 4,636,000 4,664,000 4,658,000                                                                  
        total liabilities, shareholders' equity and redeemable noncontrolling interest
                                 2,745,186,000 2,719,096,000                                                                   
        54,078,698 shares issued and outstanding at june 30, 2019 and
                                                                                                     
        investments in equity - long term
                                   9,482,000                                                                  
        53,976,367 shares issued and outstanding at march 31, 2019 and
                                                                                                     
        short term investments - available for sale
                                     65,261,000 83,777,000  81,541,000 77,589,000 82,673,000 86,664,000  81,667,000 81,667,000 68,046,000  84,412,000 82,481,000  86,520,000 85,990,000 81,739,000  84,727,000 96,434,000 97,100,000 95,036,000 95,036,000 94,059,000  126,865,000  59,889,000 83,386,000 59,379,000  73,116,000  39,300,000 39,300,000 40,000,000 40,000,000 40,000,000      30,260,000 49,227,000 104,692,000 104,692,000 93,923,000 93,923,000 26,182,000 42,726,000 42,726,000 42,726,000 29,743,000 41,752,000 28,707,000 28,707,000 39,822,000 39,822,000 37,827,000 22,809,000 22,034,000 22,034,000 
        54,435,930 shares issued and outstanding at september 30, 2018 and
                                                                                                     
        54,081,601 shares issued and outstanding at december 31, 2017
                                     4,689,000 4,684,000  4,643,000                                                             
        54,327,869 shares issued and outstanding at june 30, 2018 and
                                                                                                     
        current asset investment - fair value reserve
                                       -295     -23       -34                                                  
        53,793,839 shares issued and outstanding at march 31, 2018 and
                                                                                                     
        ordinary shares, par value 6 euro cents per share;100,000,000 shares authorized,
                                                                                                     
        54,081,601 shares issued and outstanding at december 31, 2017 and54,530,843 shares issued and outstanding at december 31, 2016.
                                         4,664,000                                                            
        non-current other assets
                                          15,097,000 14,617,000  14,400,000 14,400,000 13,831,000  13,667,000 13,306,000  13,081,000 11,591,000 11,271,000  12,242,000 12,833,000 11,583,000 10,368,000 10,368,000 9,500,000  7,373,000  6,428,000 6,431,000 6,075,000  5,236,000  4,711,000 4,711,000 4,538,000 4,538,000 4,472,000 4,353,000 3,802,000 3,802,000  3,708,000 3,679,000 3,082,000 3,138,000 3,138,000 2,865,000 2,865,000 2,451,000 2,179,000 2,288,000 2,347,000 2,273,000 2,140,000         
        54,152,200 shares issued and outstanding at september 30, 2017 and
                                                                                                     
        54,530,843 shares issued and outstanding at december 31, 2016
                                          4,669,000 4,662,000  4,644,000 4,644,000                                                       
        54,041,414 shares issued and outstanding at june 30, 2017 and
                                                                                                     
        share based payment reserve
                                            141,890       108,397    65,103       52,407                                       
        53,775,703 shares issued and outstanding at march 31, 2017 and
                                                                                                     
        54,530,843 shares issued and outstanding at december 31, 2016 and 54,958,912 shares issued and outstanding at december 31, 2015.
                                               4,611,000                                                      
        capital redemption reserve
                                               809,000 715 715,000 715,000 715 715,000 715,000 556,000 363 363,000 305,000 305,000 171,000 171,000 124,000 100 100,000  100,000 100,000 100,000  100,000                                
        attributable to equity holders
                                                496,969       868,938                                              
        total equity
                                                496,969       868,938                        617,873                      
        55,827,713 shares issued and outstanding at september 30, 2016 and
                                                                                                     
        54,958,912 shares issued and outstanding at december 31, 2015
                                                 4,697,000 4,685,000  4,682,000                                                 
        55,459,627 shares issued and outstanding at june 30, 2016 and
                                                                                                     
        55,065,080 shares issued and outstanding at march 31, 2016 and
                                                                                                     
        54,958,912 shares issued and outstanding at december 31, 2015 and 60,106,780 shares issued and outstanding at december 31, 2014.
                                                     4,679,000                                                
        bank credit lines and loan facilities
                                                      350,000,000  60,000,000 20,000,000                          2,570,000 2,570,000 33,371,000 33,371,000 38,239,000 40,193,000 42,524,000 59,029,000 82,753,000 43,767,000 70,487,000 15,947,000 5,000,000 5,000,000     
        57,234,463 shares issued and outstanding at september 30, 2015 and
                                                                                                     
        60,106,780 shares issued and outstanding at december 31, 2014
                                                      4,832,000  5,008,000 5,059,000                                            
        functional currency translation reserve
                                                                                                     
        59,869,421 shares issued and outstanding at june 30, 2015 and
                                                                                                     
        60,580,540 shares issued and outstanding at march 31, 2015 and
                                                                                                     
        60,106,780 shares issued and outstanding at december 31, 2014 and 61,587,257 shares issued and outstanding at december 31, 2013.
                                                          5,037,000                                           
        61,571,141 shares issued and outstanding at september 30, 2014 and
                                                                                                     
        61,587,257 shares issued and outstanding at december 31, 2013
                                                           5,159,000 5,159,000 5,185,000  5,201,000                                      
        61,897,155 shares issued and outstanding at june 30, 2014 and
                                                                                                     
        62,020,483 shares issued and outstanding at march 31, 2014 and
                                                                                                     
        balance sheet data:
                                                                                                     
        short term investments
                                                                138,317,000    76,183,000  54,940,000                               
        working capital
                                                                352,259,000    250,326,000  253,514,000                               
        long term government grants
                                                                1,359,000    1,427,000  1,351,000             1,861,000 1,861,000 1,318,000 1,318,000 1,295,000 1,386,000 1,456,000 1,210,000 1,244,000 1,179,000 1,177,000 1,144,000 1,160,000 1,170,000 1,179,000 1,157,000 1,257,000 1,257,000 
        long term liabilities
                                                                11,198,000    14,312,000  20,038,000                               
        ordinary share capital
                                                                5,168,000    5,067,000  5,055,000                               
        shareholders’ equity
                                                                910,579,000    754,575,000  681,544,000                               
        restricted cash
                                                                 2,250,000 2,250,000 3,750,000                                  
        61,203,848 shares issued and outstanding at september 30, 2013 and
                                                                                                     
        60,287,498 shares issued and outstanding at december 31, 2012
                                                                 5,136,000 5,109,000 5,088,000                                  
        60,861,741 shares issued and outstanding at june 30, 2013 and
                                                                                                     
        60,543,753 shares issued and outstanding at march 31, 2013 and
                                                                                                     
        total debt
                                                                                                     
        ordinary shares, par value 6 euro cents per share; 100,000,000 shares authorized, 59,679,858 shares issued and outstanding at june 30, 2012 and 60,135,603 shares issued and outstanding at december 31, 2011
                                                                     5,021,000                                
        reimbursable expenses are comprised of payments to investigators and certain other costs reimbursed by clients under terms specific to each of the company’s contracts. see note 2 (d) to the audited consolidated financial statements.
                                                                                                     
        net income per ordinary share is based on the weighted-average number of outstanding ordinary shares. diluted net income per share includes potential ordinary shares from the exercise of options.
                                                                                                     
        60,496,900 shares issued and outstanding at september 30, 2011 and
                                                                                                     
        60,247,092 shares issued and outstanding at december 31, 2010
                                                                       5,085,000 5,085,000 5,079,000 5,079,000 5,070,000                          
        60,436,120 shares issued and outstanding at june 30, 2011 and
                                                                                                     
        60,323,300 shares issued and outstanding at march 31, 2011 and
                                                                                                     
        ordinary shares, par value 6 euro cents per share; 100,000,000 shares authorized
                                                                                                     
        59,007,565 shares issued and outstanding at december 31, 2009 and 60,247,092 shares issued and outstanding at december 31, 2010
                                                                            5,063,000                         
        60,074,916 shares issued and outstanding at september 30, 2010 and
                                                                                                     
        59,007,565 shares issued and outstanding at december 31, 2009
                                                                             5,050,000 5,050,000  5,031,000 5,001,000                    
        options reserve
                                                                               32,580                      
        deferred government grants and other liabilities
                                                                               1,376                      
        59,834,190 shares issued and outstanding at june 30, 2010 and
                                                                                                     
        59,444,119 shares issued and outstanding at march 31, 2010 and
                                                                                                     
        non-current bank credit lines and facilities
                                                                                        65,186,000    51,062,000         
        shareholders’ equity:
                                                                                                     
        58,518,195 shares issued and outstanding at december 31, 2008 and 59,007,565 shares issued and outstanding at december 31, 2009*.
                                                                                  4,965,000                   
        intangible asset
                                                                                   9,028,000 9,028,000 9,550,000 9,550,000   3,307,000 1,495,000           
        long term finance leases
                                                                                   235,000 235,000 313,000 313,000 391,000 470,000 546,000 30,000 40,000 49,000 70,000 110,000 138,000 163,000 100,000 123,000 248,000 248,000 
        non-current bank credit lines & loan facilities
                                                                                   25,700,000 25,700,000 30,736,000 30,736,000   37,023,000 48,371,000           
        58,647,536 shares issued and outstanding at september 30, 2009 and
                                                                                                     
        58,518,195 shares issued and outstanding at december 31, 2008
                                                                                   4,933,000 4,933,000 4,929,000 4,929,000 4,924,000              
        58,599,104 shares issued and outstanding at june 30, 2009 and
                                                                                                     
        liabilities and shareholders� equity
                                                                                                     
        58,557,464 shares issued and outstanding at march 31, 2009 and
                                                                                                     
        minority interest
                                                                                         2,015,000 1,841,000 1,635,000 1,307,000 1,228,000 1,168,000 1,162,000 1,120,000 970,000 936,000 884,000 884,000 
        57,670,488 shares issued and outstanding at december 31, 2007 and 58,518,195 shares issued and outstanding at december 31, 2008*.
                                                                                        4,921,000             
        58,500,155 shares issued and outstanding at september 30, 2008 and
                                                                                                     
        57,670,488 shares issued and outstanding at december 31, 2007
                                                                                         4,918,000            
        ordinary shares, par value 6 euro cents per share; 40,000,000 shares authorized,
                                                                                                     
        29,186,116 shares issued and outstanding at june 30, 2008 and
                                                                                                     
        28,835,244 shares issued and outstanding at december 31, 2007
                                                                                          2,158,000 2,139,000          
        28,986,318 shares issued and outstanding at march 31, 2008 and
                                                                                                     
        28,036,184 shares issued and outstanding at december 31, 2005, 28,517,852 shares issued and outstanding at december 31, 2006 and 28,835,244 shares issued and outstanding at december 31, 2007
                                                                                            2,127,000         
        28,783,048 shares issued and outstanding at september 30, 2007 and
                                                                                                     
        28,517,852 shares issued and outstanding at december 31, 2006
                                                                                             2,118,000 2,117,000 2,110,000      
        28,738,589 shares issued and outstanding at june 30, 2007 and
                                                                                                     
        28,641,821 shares issued and outstanding at march 31, 2007 and
                                                                                                     
        27,798,192 shares issued and outstanding at may 31, 2005 and 28,036,184 shares issued and outstanding at december 31, 2005 and 28,517,852 shares issued and outstanding at december 31, 2006
                                                                                                2,100,000     
        ordinary shares, par value 6 euro cents per share; 20,000,000 shares authorized, 14,176,636 shares issued and outstanding at june 30, 2006 and 14,018,092 shares issued and outstanding at december 31, 2005
                                                                                                     
        ordinary shares, par value 6 euro cents per share; 20,000,000 shares authorized,
                                                                                                     
        14,091,097 shares issued and outstanding at march 31, 2006 and 14,018,092 shares issued and outstanding at december 31, 2005
                                                                                                  998,000   
        the accompanying notes are an integral part of these consolidated financial statements.
                                                                                                     
        13,838,476 shares issued and outstanding at may 31, 2004 and 13,899,096 shares issued and outstanding at may 31, 2005 and 14,018,092 shares issued and outstanding at december 31, 2005
                                                                                                   985,000 985,000 
      Cashflow Statements:
      Quarterly
      Annual
        Unit: USD2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2023-12-31 2023-04-26 2022-12-31 2022-11-02 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-03-31 2017-12-31 2017-09-30 2017-04-27 2017-03-31 2016-12-19 2016-09-30 2016-03-31 2015-12-31 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-03-31 2013-12-31 2013-11-07 2013-06-30 2013-03-31 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-07-28 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-03-31 2006-03-31 
                                                                    
          cash flows from operating activities:
                                                                    
          net income
        2,355,000 182,972,000 154,151,000 259,998,000 197,128,000 216,418,000 116,654,000 117,445,000 160,155,000 76,468,000 -94,270,000 73,865,000 97,122,000 101,234,000 91,641,000 92,329,000 99,861,000 95,483,000 92,215,000 88,297,000 88,163,000 84,527,000 78,098,000 71,108,000 74,154,000 71,409,000 71,409,000  63,879,000 62,964,000 63,542,000 58,585,000 55,869,000 45,174,000 50,316,000 36,195,000 33,480,000 27,808,000 22,479,000 19,045,000 -18,744,120 -2,663,000 13,082,000 8,348,000 22,100,000  22,873,000 22,199,000 30,874,000 23,951,000 18,530,000 20,944,000 -57,016,880 21,380,000 18,821,000 16,894,000 15,881,000 14,501,000 12,266,000 7,541,000 
          adjustments to reconcile net income to net cash from operating activities:
                                                                    
          depreciation and amortization expense
        98,495,000 97,718,000 95,958,000  93,029,000 149,733,000 145,126,000 142,228,000 141,861,000 139,670,000                                                   
          goodwill impairment
                                                                    
          impairment of operating right-of-use assets and related property, plant and equipment
          3,172,000                                                        
          reduction in carrying value of operating right-of-use assets
        10,496,000 9,593,000 9,384,000 9,967,000 10,453,000 7,567,000 11,304,000 9,977,000 11,668,000 14,732,000 16,570,000 6,922,000 7,115,000 7,113,000 7,030,000 7,328,000                                             
          amortization of financing costs and debt discount
        1,499,000 1,491,000 1,480,000 1,467,000 1,462,000 3,917,000 4,497,000                                                      
          stock compensation expense
        44,919,000 15,251,000 12,359,000 4,687,000 13,038,000 8,364,000 14,759,000 14,820,000 17,517,000 19,053,000 99,917,000 8,480,000 6,394,000 6,114,000 6,971,000 6,069,000 5,754,000 8,231,000 5,755,000 7,079,000 6,620,000 8,544,000 9,392,000 3,612,000 8,260,000 8,809,000 8,809,000                                  
          deferred tax benefit
        -45,693,000 -21,081,000 -25,014,000 -13,963,000 -25,340,000                                                        
          unrealized foreign exchange movements
        -10,116,000 16,696,000 18,081,000 -27,107,000 20,257,000                                                        
          other non-cash items
        5,295,000 7,026,000 8,240,000 5,072,000 14,365,000 2,366,000 17,534,000 -7,271,000 9,436,000 5,181,000                                                   
          changes in operating assets and liabilities:
                                                                    
          accounts receivable
        -23,361,000 14,668,000 9,706,000 -3,486,000 154,046,000 55,800,000 -93,259,000 -279,935,000 -99,728,000 -9,900,000                                                   
          unbilled revenue
        -10,061,000 -48,115,000 84,155,000 83,612,000 -136,350,000 -9,654,000 -18,346,000 -111,488,000 -187,917,000 -66,859,000                                                   
          unearned revenue
        21,217,000 -1,000 -122,305,000 35,187,000 -20,849,000 -23,703,000 80,990,000 164,592,000 205,256,000 -8,607,000                                                   
          other net assets and liabilities
        127,257,000                                                            
          net cash from operating activities
        387,602,000 146,201,000 268,240,000 338,314,000 402,673,000 440,131,000 175,500,000 -59,426,000 213,775,000 289,818,000 298,970,000 128,434,000 111,920,000 195,422,000 111,965,000 142,760,000 134,445,000 160,727,000 22,735,000 94,634,000 60,863,000 128,105,000 40,468,000 105,898,000 108,766,000 159,327,000 159,327,000  51,911,000 59,438,000 116,104,000  61,113,000 75,218,000 110,986,000 38,660,000 97,421,000 43,589,000 10,846,000 69,371,000 17,648,191   -5,283,000 31,927,000  35,055,000 16,765,000 56,697,000 70,310,000 103,393,000 24,670,000 -85,953,718 57,622,000 40,743,000 -12,330,000 23,048,000 561,000  10,544,000 
          capital expenditures
        -53,700,000 -32,278,000 -28,907,000 -61,288,000 -43,332,000 -52,712,000 -26,744,000 -57,015,000 -37,305,000 -47,683,000 -24,414,000 -12,949,000 -8,704,000 -23,029,000 -6,865,000 -8,511,000 -8,298,000 -8,298,000  -9,452,000 -7,658,000 -13,475,000  -10,688,000 -10,177,000 -9,636,000 -6,163,000 -6,097,000 -6,185,000 -7,814,000 -9,392,000 24,572,716   -6,023,000 -7,046,000  -7,420,000 -9,549,000 -7,769,000 -9,639,000 53,497,118 -18,079,000 -18,969,000 -16,517,000 -25,731,000 -19,267,000  -4,516,000 
          free cash flows
        333,902,000 113,923,000 239,333,000 277,026,000 359,341,000 387,419,000 148,756,000 -116,441,000 176,470,000 242,135,000 274,556,000 115,485,000 103,216,000 172,393,000 105,100,000 142,760,000 134,445,000 160,727,000 22,735,000 94,634,000 60,863,000 128,105,000 40,468,000 105,898,000 100,255,000 151,029,000 151,029,000  42,459,000 51,780,000 102,629,000  50,425,000 65,041,000 101,350,000 32,497,000 91,324,000 37,404,000 3,032,000 59,979,000 42,220,907   -11,306,000 24,881,000  27,635,000 7,216,000 48,928,000 60,671,000 103,393,000 24,670,000 -32,456,600 39,543,000 21,774,000 -28,847,000 -2,683,000 -18,706,000  6,028,000 
          cash flows from investing activities:
                                                                    
          purchase of property, plant and equipment
        -53,700,000 -32,278,000 -28,907,000 -61,288,000 -43,332,000 -52,712,000 -26,744,000 -57,015,000 -37,305,000 -47,683,000 -24,414,000 -12,949,000 -8,704,000 -23,029,000 -6,865,000          -8,511,000 -8,298,000 -8,298,000 29,344,925 -9,452,000 -7,658,000 -13,475,000 -13,400,000 -10,688,000 -10,177,000 -9,636,000 -6,163,000 -6,097,000 -6,185,000 -7,814,000 -9,392,000 24,572,716 -11,511,000 -7,074,000 -6,023,000 -7,046,000 -23,893,534 -7,420,000 -9,549,000 -7,769,000 -9,639,000   53,497,118 -18,079,000 -18,969,000 -16,517,000 -25,731,000 -19,267,000 -12,534,000 -4,516,000 
          purchase of subsidiary undertakings
        -2,537,000 1,470,000 -77,798,000 -66,666,000        -564,000              -52,396,000   -1,000 -103,138,000    -15,091,000 -26,764,000 -51,897,000  -29,550,000 -5,507,000 -27,720,000                 
          movement of available for sale investments
                                                                   
          proceeds from investments in equity
        1,553,000 458,000 103,000 19,000                                                         
          purchase of investments in equity
        -3,956,000 -6,389,000 -5,941,000 -7,130,000                                                         
          net cash from investing activities
        -56,103,000 -38,209,000 -37,282,000 -68,883,000 -124,342,000 -122,503,000 -28,042,000 -58,882,000 -38,346,000 -59,017,000 -5,939,344,000 -16,571,000 -9,303,000 -23,504,000 -11,343,000          -129,762,000 -21,600,000 -21,600,000  -62,041,000 -7,598,000 -81,279,000 -1,830,000 -112,849,000 -15,576,000   -82,146,000 2,250,000 -57,276,000 -47,203,000 118,551,618   -67,408,000 -7,328,000    45,253,000 -19,466,000   65,993,553 -17,679,000 -32,876,000 -15,556,000 -36,934,000 -62,258,000 -12,534,000 -4,516,000 
          cash flows from financing activities:
                                                                    
          new notes issue costs
           -1,000 -999,000                                                        
          drawdown of credit lines and loan facilities
        50,000,000 75,000,000 50,000,000                                                        
          repayment of credit lines and loan facilities
        -7,440,000 -7,441,000 -57,440,000 -82,440,000 -57,441,000                                                        
          proceeds from exercise of equity compensation
        821,000 1,735,000 4,763,000 3,808,000 10,734,000 14,456,000 12,940,000  13,827,000  103,888,000 177,000 5,000  10,888,000 867,000  4,000,000 13,663,000 3,391,000  4,596,000 727,000  1,911,000 2,780,000 2,780,000   1,137,000                               
          share issue costs
        -5,000 -4,000 -5,000 -5,000 -3,000 -2,000    -5,000 -838,000 -5,000 -5,000 -4,000 -4,000          -3,000 -7,000 -7,000                                  
          repurchase of ordinary shares
        -250,000,000 -250,000,000 -250,000,000 -399,998,000                 -96,404,000 -96,404,000    -170,969,000   -95,524,000 -32,974,000                          
          share repurchase costs
        -150,000 -150,000 -150,000 -320,000                 -77,000 -77,000    -87,000   -999,000 -21,000                          
          net cash from financing activities
        -256,774,000 -255,860,000 -252,832,000 -403,956,000 -97,777,000 -255,546,000 -157,064,000 -193,137,000 -186,173,000 -485,465,000 5,600,021,000   -45,532,000 10,884,000          1,908,000 -93,708,000 -93,708,000 -59,010,510  5,260,000 -165,044,000 -14,763,000 30,065,000   10,547,000   5,628,000 5,054,000 -3,413,848 833,000 1,523,000 1,054,000 1,619,000    -25,183,000 -37,185,000   1,774,337 -16,480,000 -16,607,000 31,335,000 23,417,000 55,705,000 1,887,000 -3,040,000 
          effect of exchange rate movements on cash
        3,767,000 11,566,000 9,787,000 -22,197,000 8,400,000 2,955,000 718,000 -8,945,000 4,984,000 -1,647,000 -6,619,000 1,006,000 -467,000 5,924,000 4,389,000        869,000 957,000 639,000 739,000 739,000  -46,000 326,000 -1,118,000 743,000 -1,988,000 -2,065,000 -2,296,000 -449,000 1,332,000 3,689,000 1,692,000 -3,892,000 -4,003,430 -4,926,000 1,185,000 7,744,000 -1,801,000  -10,907,000 -7,036,000 -146,000 1,140,000   2,620,325 -2,698,000 -819,000 892,000 -2,149,000 -2,844,000 14,000 -28,000 
          net increase in cash and cash equivalents
              -8,888,000 -320,390,000 -5,760,000 -256,311,000 -46,972,000 113,041,000 102,150,000 132,310,000 115,895,000  102,705,000   21,787,000 -30,370,000 137,002,000  73,054,000 -18,449,000 44,758,000 44,758,000 -115,319,254 50,838,000 57,426,000 -131,337,000  -23,659,000   54,137,000    23,330,000 128,782,531   -63,893,000 24,417,000 86,394,096 51,278,000 24,683,000 76,621,000   12,438,000    4,341,000 7,382,000 -8,836,000 -13,427,000  
          cash and cash equivalents at beginning of period
        538,785,000   288,768,000   840,305,000  520,309,000  395,851,000  282,859,000  192,541,000 192,541,000  103,911,000  118,900,000  182,519,000  114,047,000  255,706,000   144,801,000  58,378,000  76,881,000  63,039,000 59,509,000 
          cash and cash equivalents at end of period
        78,492,000 -136,302,000 526,698,000  188,954,000  279,880,000  -5,760,000  -46,972,000 113,041,000 942,455,000  115,895,000 482,372,000  47,396,000 -47,430,000 417,638,000  137,002,000 272,001,000  -18,449,000 237,299,000 237,299,000  50,838,000 161,337,000  12,228,000 95,241,000  72,263,000 236,656,000  58,192,000 -39,110,000 137,377,000  -48,777,000 -16,249,000 191,813,000  231,068,238 51,278,000 169,484,000  14,799,000 -17,435,000 70,816,000  20,765,000 -9,559,000 81,222,000  -8,836,000 49,612,000 62,469,000 
          cash flows used in investing activities:
                                                                    
          cash flows used in financing activities:
                                                                    
          net (decrease) / increase in cash and cash equivalents
         -136,302,000 -12,087,000                                                          
          other net assets
          22,045,000 -116,947,000 81,434,000 -26,050,000 -68,186,000 -156,492,000 9,459,000                                                    
          depreciation and amortization
                                                -27,930,318 9,667,000 9,329,000 8,973,000 8,868,000  8,281,000 8,722,000 9,239,000 8,404,000 7,526,000 7,490,000 -20,648,272 7,937,000 6,641,000 6,098,000 5,382,000 5,020,000 4,156,000 3,445,000 
          loss on equity method investments
             383,000 493,000 1,002,000 690,000 688,000 509,000 274,000 283,000                                               
          acquisition-related gain
                                                                    
          net increase/(decrease) in cash and cash equivalents
                                                                    
          cash and cash equivalents at beginning of year
                                                                    
          cash and cash equivalents at end of year
                                                                    
          proceeds from investments in equity - long term
                                                                    
          purchase of investments in equity - long term
             -3,125,000 -1,358,000 -3,772,000 -1,041,000 -1,334,000 -472,000 -1,172,000 -599,000 -475,000 -1,464,000                                              
          net increase / (decrease) in cash and cash equivalents
                                                                    
          impairment of long lived assets
             -159,000 6,933,000                                                      
          acquisition related gain
                                                                    
          charge on cash flow hedge
             -928,000 2,253,000                                                      
          sale of available for sale investments
             1,005,000 482,000   480,000    47,903,000 -2,128,000 14,753,000 8,822,000 239,000                                         
          purchase of available for sale investments
             -1,005,000 -422,000                                                      
          drawdown of credit lines and facilities
                                                           17,400,000         
          repayment of credit lines and facilities
                                                        -28,599,000 -37,651,000           
          deferred taxes
              -43,823,000    -29,845,000 3,977,000 -664,000  4,029,000   714,000 1,725,000 740,000    9,150,000 2,160,000 -3,593,000 -3,593,000  -4,207,000 -626,000 3,906,000 2,299,000 -173,000 -6,391,000 -5,870,000 -4,868,000 -6,240,000 -2,451,000 -445,000 -1,447,000 7,378,879 -5,089,000 4,709,000 -7,005,000 2,740,000  -1,069,000 -382,000 4,117,000 -2,950,000   427,909 3,372,000 -874,000 -2,923,000 -899,000 -329,000 907,000 -335,000 
          foreign exchange movements
              -1,319,000                                                      
          drawdown of bank credit lines and loan facilities
              180,000,000                     53,000,000   40,000,000 20,000,000                     -22,781,000 26,722,000     
          repayment of bank credit lines and loan facilities
              -350,000,000  -200,000,000                                                   
          changes in assets and liabilities:
                                                                    
          sale of investments in equity - long term
                                                                    
          loss on extinguishment of debt
                 59,460,000                                                  
          unrealised fx
                                                                    
          loss on issuance of debt
                                                                    
          purchase of equity method investments
                                                                   
          loan to equity method investment
                                                                    
          proceeds from investments in equity – long term
                                                                    
          financing costs
                                    -85,000 -118,000                               
          deferred tax expense
                                                                    
          unrealized foreign exchange loss
                                                                    
          investment in equity method investments
                                                                    
          purchase of noncontrolling interest
                                                                    
          proceeds from the exercise of equity compensation
                                                                    
          settlement of cash flow hedge
                                                                    
          impairment of right-of-use assets
                                                                  
          amortization of interest rate hedge
                   835,000 56,000  -243,000                                              
          amortization of financing costs
                  2,856,000 1,453,000 139,000 155,000 110,000 119,000 147,000 138,000 118,000 137,000 141,000 141,000 390,000 148,000 126,000 140,000 140,000  146,000 130,000                               
          purchase of subsidiary undertakings, net of cash acquired
                                                                    
          purchase of equity method investment
                                                                    
          financing related costs
                                                                    
          excess tax benefit on exercise of equity compensation
                                                                    
          charge on interest rate hedge
                                                                    
          unrealized foreign exchange gain
                                                                    
          unrealised foreign exchange loss
                                                                    
          charge/(credit) on interest rate hedge
                                                                    
          changes in operating assets and liabilities, net of acquired assets and assumed liabilities:
                                                                    
          settlement of interest rate hedge
                                                                    
          unrealised foreign currency gains
                                                                    
          loss on interest rate hedge
                                                                    
          other assets and liabilities
                                                                    
          drawdown of bank credit lines and loan facilities, net of debt issuance costs and debt discount withheld
                                                                    
          unrealized foreign currency gains
                                                                    
          loss on disposal of property, plant and equipment
                   -5,000 18,000 28,000 37,000 129,000 188,000   61,000 7,000 2,000 43,000 -163,000    7,000  4,000 333,000 -153,000 31,000 415,000 25,000 193,000 29,000 -66,864 54,000 13,000 22,000 113,885 112,000 3,000 17,000 66,000 8,000 173,000 -167,746 16,000 -9,000 161,000 -21,000 241,000 85,000  
          depreciation expense
                   13,218,000 12,722,000 12,339,000 11,910,000 11,413,000 11,332,000 11,355,000 11,334,000 11,582,000 15,133,000 11,653,000 11,850,000 11,688,000 11,361,000 10,018,000 10,018,000  10,675,000 10,161,000 10,173,000 9,765,000 9,907,000 11,406,000 10,762,000 9,682,000 9,867,000 9,736,000 9,660,000 9,712,000                     
          amortization of intangibles
                   4,058,000 4,683,000 4,806,000 4,891,000 4,909,000 4,376,000 3,802,000 3,854,000 3,915,000 -223,000 5,409,000 5,048,000 4,486,000 4,919,000 4,430,000 4,430,000  3,868,000 4,959,000 4,969,000 4,479,000 4,018,000 2,929,000 2,975,000 1,866,000 2,096,000 1,839,000 1,860,000 1,744,000                     
          amortization of government grants
                   -12,000 -12,000 -12,000 -11,000          -12,000 -10,000 -10,000                                  
          interest on non-current operating lease liability
                   407,000 463,000  120,000 493,000  514,000 817,000 689,000                                         
          realized gain on sale of short term investments
                     -2,000                                              
          gain on re-measurement of financial assets
                                                                    
          decrease in accounts receivable
                   -15,365,000 52,015,000  -33,547,000 2,869,000    3,545,000    -32,458,000 30,393,000 76,478,000 76,478,000  -24,723,000 47,407,000   16,381,000   4,958,000    28,841,000 22,649,919  17,322,000 -13,373,000 8,227,000 10,020,805   -1,659,000           -6,737,000 
          decrease in unbilled revenue
                   894,000 11,796,000                           1,230,000    -20,546,000 -4,190,000  9,539,000 2,859,000 27,382,000 -6,101,000 9,248,000 17,369,000         
          decrease in other receivables
                   -821,000 3,227,000 -2,332,000 2,684,000 5,782,000 897,000 -50,000 1,268,000 398,000 -1,812,000            -2,699,000        4,201,331    467,000    -5,865,000   6,824,000    458,000 515,000 -1,205,000 1,849,000 276,000 
          decrease in prepayments and other current assets
                                     1,586,000          665,000                     
          decrease in other non-current assets
                   -1,132,000 -616,000   2,466,000                                             
          increase in unearned revenue
                   64,613,000 -50,079,000 209,458,000 57,330,000 19,232,000                                             
          decrease in other current liabilities
                                    -32,000                   -12,624,000        -9,718,000     
          decrease in operating lease liabilities
                   -7,420,000 -7,531,000 -7,707,000 -7,381,000                                              
          increase in other non-current liabilities
                   -45,000 1,196,000 -631,000 -1,468,000 529,000 -242,000 1,500,000        1,082,000 1,082,000  2,010,000 1,520,000  389,000 1,757,000  349,000                     57,000     
          decrease in income taxes payable
                                          10,806,000 -492,000 -999,000                        
          increase in accounts payable
                     22,217,000 -4,099,000    -5,108,000 5,403,000    5,570,000     -1,958,000 -1,383,000 2,022,000  406,000   2,170,000  -3,153,000 4,974,000 423,000             1,779,150     997,000 2,224,000 2,639,000 
          cash acquired with subsidiary undertaking
                      10,170,000 -3,000 3,295,000 7,719,000 686,000    1,015,000                    6,335,000           5,000     
          loss on re-measurement of financial assets
                    -2,250,000   200,000                                             
          increase in prepayments and other current assets
                    -10,559,000 -9,848,000           1,508,000    -278,000  3,087,000 -6,510,000 -2,522,000  -1,472,000       -3,201,000 -1,420,000 232,000   -1,029,000 -2,633,000  -2,505,000    -1,741,000 -1,002,000 -3,709,000  -241,000 -2,030,000 -1,598,000 
          increase in other current liabilities
                    -17,307,000 36,608,000  19,711,000 19,688,000   16,432,000   27,523,000 4,230,000      -10,494,000   13,462,000 33,971,000  20,983,000 14,776,000    -14,149,610   2,993,000 -6,117,000                
          increase in income taxes payable
                    6,652,000 7,663,000  5,304,000 -5,764,000   2,907,000   4,300,000   8,839,000 8,839,000 -4,163,276 4,926,000 8,626,000 -10,046,000  2,734,000           12,282,000     -19,282,000 7,909,000 2,644,000 4,893,000  -1,578,000 -586,000 4,480,000 -2,713,000 2,514,000 1,133,000 2,380,000 
          decrease in accounts payable
                    -2,911,000                             2,221,000 -4,368,000 -5,331,000  -3,168,893 -688,000 -3,419,000  -1,969,000           
          interest on short term investments
                                -351,000 -251,000 -251,000                                  
          interest on operating lease liability
                                                                    
          amortization of gain on interest rate hedge
                                -234,000 -230,000 -230,000  -235,000 -210,000                               
          increase in accounts receivable
                                      -10,854,000   342,000 8,391,000  22,444,000 -47,129,000               53,665,184   -46,821,000   -1,454,000  
          increase in unbilled revenue
                     11,887,000           7,374,000 -32,944,000 -32,944,000  -2,481,000 -64,516,000 21,426,000 -16,706,000 -11,716,000  -1,178,000                     -15,045,000  -17,327,000 -11,000 -1,014,000 
          cash acquired from subsidiary undertakings
                                                                    
          loss on settlement of interest rate hedge
                                                                    
          loss on settlement of derivative
                                                                    
          increase in other non-current assets
                                -482,000 -526,000 -526,000   -1,413,000                               
          profit for the financial year
                                                                    
          adjustments to reconcile net income to net cash generated from operating activities
                                                                    
          depreciation of property, plant and equipment
                                                                    
          depreciation of right-of-use assets
                                                                    
          amortisation of intangible assets
                                                                    
          amortisation of grants
                                                                    
          realised gain on sale of current asset investments
                                                                    
          fair value movement on put option
                                                                    
          interest on lease liabilities
                                                                    
          loss on re-measurement of long-term financial assets
                                                                    
          amortisation of gain on interest rate hedge
                                                                    
          amortisation of deferred financing costs
                                                                    
          share based payment
                                                                    
          financing income
                                                                    
          financing expense
                                                                    
          defined benefit pension service costs
                                                                    
          defined benefit pension finance costs
                                                                    
          defined benefit past service cost
                                                                    
          income tax expense
                                                                    
          operating cash inflow before changes in working capital
                                                                    
          decrease in other current assets
                                                                    
          decrease in other non current assets
                                                                    
          increase in inventory
                                                                    
          decrease in accrued and other liabilities and provisions
                                                                    
          increase in non current other liabilities and provisions
                                                                    
          cash from operations
                                                                    
          income taxes paid
                                                                    
          employer contribution defined benefit pension scheme
                                                                    
          interest received
                                                                    
          interest paid
                                                                    
          net cash inflow from operating activities
                                                                    
          investing activities
                                                                    
          purchase of intangible assets
                                                                    
          cash acquired with subsidiary undertakings
                                            1,039,000  1,965,000                   
          sale/maturity of current asset investments
                                                                    
          purchase of current asset investments
                                                                    
          financing activities
                                                                    
          payment of lease liabilities
                                                                    
          tax benefit from the exercise of share options
                                    3,043,000 4,241,000  540,000 1,923,000  1,018,000 726,000  204,000 -58,000 251,000 -473,319 189,000 -13,000 298,000 97,000 2,245,821 1,021,000 1,158,000 386,000 46,000 52,000 3,000 -3,986,940 285,000 2,316,000 1,390,000 396,000 67,000   
          proceeds from exercise of share options, rsus and psus
                                                                    
          share issuance costs
                                   15,984 -7,000  -2,000 -4,000 -4,000 -5,000 -4,000 -2,000 -9,000 -59,000 73,924 -8,000 -3,000 -63,000 -50,972 -17,000 -11,000 -15,000 -13,000   127,862 -83,000 -8,000 -37,000 -9,000 -64,000 -5,000 
          effect of exchange rate changes
                                                                    
          cash and cash equivalents at start of year
                                                                    
          adjustments to reconcile net income to net cash
                                                                    
          provided by operating activities:
                                                                    
          amortization of operating right-of-use assets
                         7,821,000 7,600,000 7,446,000                                         
          increase in payments on account
                         -144,000 -1,694,000 43,957,000   8,040,000        24,029,000      14,342,000 9,109,000 49,436,000 3,179,000    7,817,000 -9,116,000    -6,826,000 12,922,000 23,155,000 14,223,000 -33,256,596   36,847,000  4,670,000 -12,996,000 4,832,000 
          decrease in other non-current liabilities
                                               -1,000                     
          decrease in deferred tax liability
                                                                    
          realized loss on sale of short term investments
                                                                    
          decrease in payments on account
                                -28,926,000 -6,115,000 -6,115,000   -687,000  15,346,000 -31,093,000         -4,918,000                   
          purchase of short term investments
                                -11,532,000 -17,977,000 -17,977,000  -8,078,000 -98,000 -4,542,000 -576,000 -60,000 -4,226,000 -8,130,000 -38,988,000 -92,441,000 -8,500,000 -48,953,000 -22,274,000 39,944,000 -40,000,000 -30,229,740 -30,260,000 102,042,000 -58,534,000   14,985,000       
          sale of short term investments
                             49,149,000 6,253,000 10,358,000 15,778,000 4,675,000 4,675,000  6,043,000 158,000 80,000 12,147,000 1,037,000 2,018,000 6,978,000 50,530,000 13,943,000 32,026,000 24,755,000 39,071,000 -380,562    79,407,513 30,260,000 49,227,000 -49,020,000 50,020,000 16,544,000 -14,011,974 2,017,000 12,009,000 3,708,000 -1,907,000   
          increase in other receivables
                                674,000 -3,103,000 -3,103,000  -3,571,000 -3,730,000 -3,818,000            -3,171,000 -1,660,000                 
          depreciation
                                                                    
          realised gain on sale of short term investments
                                                                   
          defined benefit expenses
                                                                    
          decrease in inventory
                                                                    
          increase in non-current other liabilities and provisions
                                                                    
          net decrease in cash and cash equivalents
                                                                    
          repayment of government grant
                                                                    
          proceeds from interest rate hedge
                                                                    
          adjustments to reconcile net income to net cash provided by operating activities:
                                                                    
          increase/(decrease) in other current liabilities
                                 22,568,000 22,568,000            -3,860,000 9,994,000                     
          (decrease)/increase in other non-current liabilities
                                                                    
          increase/ (decrease) in income taxes payable
                                                                    
          the accompanying notes are an integral part of these condensed consolidated financial statements.
                                                                    
          realised loss on sale of short term investments
                                                                    
          increase in other non current assets
                                        -1,254,000 -1,435,000 608,000 -643,000 -299,000 3,000 -361,000 -489,000 356,767 -172,000 -66,000 -119,000 -551,000 -719,374 -29,000 -597,000 56,000 -273,000   147,961 59,000 -74,000 -133,000     
          (increase)/decrease in prepayments and other current assets
                                 -2,522,000 -2,522,000         -5,304,000                         
          increase/(decrease) in accounts payable
                                 4,848,000 4,848,000                                  
          realized (gain)/loss on sale of short term investments
                                                                    
          decrease/(increase) in accounts receivable
                                                       1,476,000             
          decrease/(increase) in prepayments and other current assets
                                                                    
          (decrease)/increase in payments on account
                                                       -186,000             
          (decrease)/increase in other current liabilities
                                                                    
          (decrease)/increase in income taxes payable
                                              -5,442,000 -166,000        -630,000             
          purchase of subsidiary undertakings and acquisition costs
                                                           11,927,460    -582,000    
          profit for the financial period
                                                                    
          share-based payment
                                                                    
          gain on sale of shares in subsidiary
                                                                    
          (increase) in other current assets
                                                                    
          (decrease) in accounts payable and accrued and other liabilities
                                                                    
          purchase of computer software
                                                                    
          decrease in amounts due from subsidiary undertakings
                                                                    
          decrease in investment in subsidiaries
                                                                    
          net cash used by investing activities
                                                                    
          proceeds from disposal of subsidiary
                                                                    
          proceeds from exercise of share options
                                        8,146,000  6,343,000 9,825,000  8,469,000 5,686,000 4,862,000   1,539,000 819,000  11,636,004 4,523,000 4,473,000  493,000 429,000 357,000  1,241,000 3,876,000 3,267,000  1,132,000 1,974,000 1,882,000 
          amortization of grants
                                    -11,000 -11,000  -14,000 -11,000  -42,000 -80,000  -29,000 -57,000 -59,000  -28,000 -28,000 -31,000   -38,000 -39,000  -37,000    -26,000 -33,000 -31,000  -30,000 -28,000 -28,000 
          accrued interest on short term investments
                                    -76,000 -210,000                               
          share compensation expense
                                    10,445,000 9,591,000  8,969,000 6,043,000  6,645,000 4,045,000  4,122,000 3,072,000 2,394,000  2,218,000        1,677,000    1,604,000    1,381,000 1,180,000  
          change in deferred tax liability
                                    567,000 -4,233,000                               
          proceeds from exercise of share options & restricted share units
                                    5,063,000                                
          net cash used by financing activities
                                                                    
          increase in other current assets
                                                                    
          increase in accrued and other liabilities and provisions
                                                                    
          receipt of government grants
                                                                    
          proceeds from exercise of share options and rsus
                                                                    
          increase in other non current liabilities
                                                617,387   181,000 523,000  142,000 330,000 233,000 357,000 369,000 302,000 -231,983 57,000       
          receipt of government grant
                                                                    
          loss/(profit) on disposal of property, plant and equipment
                                                                    
          share-based compensation expense
                                                   1,943,000    1,797,000    1,594,000    1,254,000     
          profit on disposal of subsidiary
                                                                    
          (increase)/decrease in other current assets
                                                                    
          increase/(decrease) in accounts payable and accrued and other liabilities
                                                                    
          increase/(decrease) in income taxes payable
                                                                    
          cash (used in)/provided by operations
                                                                    
          net cash (outflow)/inflow from operating activities
                                                                    
          disposal of subsidiary undertaking
                                                                    
          increase in investment in subsidiaries
                                                                    
          net cash provided by/(used in) investing activities
                                           5,379,000            9,418,000             
          increase in amounts due from subsidiary undertakings
                                                                    
          proceeds from exercise of share options and rsu’s
                                                                    
          cash and cash equivalents the at start of the period
                                                                    
          cash and cash equivalents at the end of the period
                                                                    
          (increase)/decrease in accounts receivable
                                                                    
          net cash from /(used in) operating activities
                                                                    
          net (decrease)/increase in cash and cash equivalents
                                                                    
          (increase)/decrease in unbilled revenue
                                           -3,573,000                         
          (increase)/decrease in other receivables
                                                       -111,000             
          increase /(decrease) in income taxes payable
                                                                    
          (decrease)/increase in accounts payable
                                                                    
          net cash (used in)/provided by financing activities
                                                                    
          change in restricted cash
                                             1,500,000 -3,750,000                     
          (increase)/ decrease in other receivables
                                                                    
          (decrease)/ increase in payments on account
                                                                    
          (decrease)/ increase in other current liabilities
                                                                    
          (decrease)/ increase in accounts payable
                                                                    
          net cash (used in) investing activities
                                                                    
          sale of current asset investments
                                                                    
          decrease/(increase) in other receivables
                                           1,199,000                         
          (decrease) /increase in payments on account
                                           -27,567,000                         
          increase /(decrease) in other non-current liabilities
                                           58,000                         
          increase/(decrease) in other non current liabilities
                                                                    
          proceeds from the exercise of share options
                                                -3,005,335                    
          net cash provided by/(used in) financing activities
                                                                    
          net cash from/(used by) financing activities
                                                                    
          increase/(decrease) in other non-current liabilities
                                                                    
          (increase) /decrease in other receivables
                                               -5,723,000                     
          decrease/(increase) in unbilled revenue
                                                                    
          increase/(decrease) in payments on account
                                                                    
          increase/increase in accounts payable
                                                                    
          net cash (used in)/provided by investing activities
                                                                    
          excess tax benefit from the exercise of share options
                                                                    
          repayment of other liabilities and finance lease obligations
                                                                    
          adjustments to reconcile net income to net cash generated from operating activities:
                                                                    
          finance income
                                                                    
          finance interest expense
                                                                    
          (decrease)/increase in accrued and other liabilities and provisions
                                                                    
          decrease in non current other liabilities and provisions
                                                                    
          cash provided by/(used in) operations
                                                                    
          net cash inflow/(outflow) from operating activities
                                                                    
          purchase of subsidiary undertakings – current year acquisitions
                                                                    
          purchase of subsidiary undertakings – prior year acquisitions
                                                                    
          cash and cash equivalents at start of period
                                                                    
          decrease in other non current liabilities
                                                                    
          decrease in income taxes receivable
                                                                    
          net cash provided by/(used in) operating activities
                                                                    
          grant received
                                                                    
          repayment of other liabilities
                                                      -76,000 -84,000  -60,000    -5,000 -10,000 -7,000  -34,000 -23,000 -29,000 
          (decrease)/increase in other non current liabilities
                                                                    
          decrease/(increase) in income taxes receivable
                                                                    
          net cash (used in)/provided by operating activities
                                                                    
          (increase)/decrease in income taxes receivable
                                                                    
          non-controlling interest
                                                                    
          cash received on acquisition
                                                                    
          grants received
                                                                    
          defined benefit pension costs
                                                                    
          increase in accrued and other liabilities
                                                                    
          increase in non current other liabilities
                                                                    
          drawdown of bank loan facilities
                                                                    
          repayment of bank loan facilities
                                                                    
          repayment of lease liabilities
                                                                    
          adjustments to reconcile net income to net cash from operating
                                                                    
          activities:
                                                                    
          purchase of subsidiary undertakings & acquisition costs
                                                              -924,000 -11,053,000     
          net cash provided by/ (used in) financing activities
                                                       5,536,000             
          minority interest
                                                            -706,807 173,000 206,000 328,000 79,000 60,000 42,000 42,000 
          bank overdraft acquired with subsidiary undertakings
                                                                    
          increase in other liabilities
                                                                 13,106,000  -1,829,000 
          decrease /(increase) in accounts receivable
                                                                    
          deferred payments in respect of historical acquisitions
                                                                    
          cash received/(overdraft assumed) on acquisition
                                                                    
          (repayment)/drawdown of bank credit lines and loan facilities
                                                                    
          (decrease) / increase in accounts payable
                                                               -527,000     
          other charges
                                                                    
          (decrease) /increase in other liabilities
                                                                    
          (decrease) /increase in accounts payable
                                                                    
          purchase of intangible asset
                                                                    
          overdraft assumed/cash received on acquisition
                                                                    
          deferred payments in respect of prior year acquisitions
                                                                    
          drawdown/(repayment) of bank credit lines and loan facilities
                                                                 54,540,000   
          decrease in other liabilities
                                                                  -10,117,000  
          net cash from/provided by operating activities
                                                                  -2,794,000  
          repayments of bank credit lines and loan facilities
                                                                    
          (repayment)/drawdown of bank overdraft
                                                                    
          proceeds from the issuance of share capital
                                                                    
          tax benefit from exercise of share options
                                                                    
          net cash used in investing activities
                                                                    
          increase/(decrease) in other liabilities
                                                                    
          non-cash stock compensation expense
                                                                   930,000 
          repayment of bank overdraft
                                                                   -4,888,000 
          net increasein cash and cash equivalents
                                                                   2,960,000 
          (increase) in prepayments and other current assets
                                                                    
          (decrease) in other liabilities
                                                                    
          the accompanying notes are an integral part of these consolidated financial statements.