7Baggers

Progress Software Corporation
(NASDAQ:PRGS) 

PRGS stock logo

Progress Software Corporation develops business applications. The company operates through three segments: OpenEdge, Data Connectivity and Integration, and Application Development and Deployment. The OpenEdge segment offers Progress OpenEdge, a development software, which builds multi-language appli...

Founded: 1981
Full Time Employees: 1,538
Sector: Technology
Industry: Software-Application

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Quarterly
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    Unit: USD2025-11-30 2025-08-31 2025-05-31 2025-02-28 2024-11-30 2024-08-31 2024-05-31 2024-02-29 2023-11-30 2023-08-31 2023-05-31 2023-02-28 2022-11-30 2022-08-31 2022-05-31 2022-02-28 2021-11-30 2021-08-31 2021-05-31 2021-02-28 2020-11-30 2020-08-31 2020-05-31 2020-02-29 2019-11-30 2019-08-31 2019-05-31 2019-02-28 2018-11-30 2018-08-31 2018-05-31 2018-02-28 2017-11-30 2017-08-31 2017-05-31 2017-02-28 2016-11-30 2016-08-31 2016-05-31 2016-02-29 2015-11-30 2015-08-31 2015-05-31 2015-02-28 2014-11-30 2014-08-31 2014-05-31 2014-02-28 2013-11-30 2013-08-31 2013-05-31 2013-02-28 2012-11-30 2012-08-31 2012-05-31 2012-02-29 2011-11-30 2011-08-31 2011-05-31 2011-02-28 2010-11-30 2010-08-31 2010-05-31 2010-02-28 2009-11-30 2009-08-31 2009-05-31 2009-02-28 2008-11-30 2008-08-31 2008-05-31 2008-02-29 2007-11-30 2007-08-31 2007-05-31 2007-02-28 2006-11-30 2006-08-31 2006-05-31 2006-02-28 2005-11-30 2005-08-31 2005-05-31 2005-02-28 2004-11-30 2004-08-31 2004-05-31 2004-02-29 2003-11-30 2003-08-31 2003-05-31 2003-02-28 2002-11-30 2002-08-31 2002-05-31 2002-02-28 
                                                                                                    
      revenue:
                                                                                                    
      software licenses
    65,210,000 63,437,000 50,795,000 58,445,000 73,402,000 57,850,000 53,979,000 64,100,000 56,270,000 50,544,000 56,407,000 57,568,000 53,154,000 47,618,000 44,814,000 42,750,000 41,236,000 51,930,000 30,107,000 33,317,000 37,443,000 27,514,000 19,663,000 30,629,000 39,336,000 30,686,000 29,728,000 22,802,000 43,151,000 27,204,000 26,439,000 25,343,000 45,963,000 28,529,000 25,592,000 24,322,000 48,497,000 33,624,000 28,787,000 23,955,000 44,456,000 31,840,000 28,722,000 25,231,000 41,156,000 26,393,000 27,988,000 22,264,000 37,392,000 25,666,000 29,347,000 32,666,000 11,122,000 30,983,000 29,673,000 41,492,000 48,707,000 38,713,000 45,417,000 51,336,000 56,475,000 44,748,000 44,228,000 47,117,000 52,028,000 39,173,000 38,513,000 45,852,000 56,102,000 45,998,000 45,015,000 45,102,000 53,785,000 44,011,000 44,555,000 44,729,000 49,412,000 42,296,000 41,357,000 42,780,000 44,084,000 37,986,000 37,221,000 37,555,000 36,798,000 32,864,000 36,905,000 33,895,000 29,947,000 27,191,000 27,074,000 25,454,000 25,126,000 22,842,000 23,023,000 22,477,000 
      maintenance, saas, and professional services
    187,456,000 186,358,000 186,560,000 179,570,000                                                                                             
      total revenue
    252,666,000 249,795,000 237,355,000 238,015,000 214,961,000 178,686,000 175,077,000 184,685,000 176,970,000 174,992,000 178,251,000 164,226,000 157,127,000 151,217,000 148,747,000 144,922,000 140,128,000 147,417,000 122,488,000 121,280,000 122,385,000 109,699,000 100,383,000 109,683,000 117,038,000 106,716,000 99,995,000 89,549,000 111,333,000 95,683,000 96,102,000 94,047,000 116,079,000 97,310,000 93,213,000 90,970,000 117,724,000 102,018,000 96,118,000 89,481,000 112,718,000 94,637,000 88,817,000 81,381,000 97,894,000 79,274,000 80,827,000 74,538,000 90,980,000 77,578,000 81,705,000 89,269,000 -1,953,000 107,173,000 114,596,000 124,426,000 136,340,000 128,334,000 134,684,000 134,237,000 145,180,000 128,737,000 127,656,000 127,547,000 136,797,000 119,433,000 117,047,000 120,860,000 139,431,000 126,620,000 127,942,000 121,567,000 136,825,000 121,804,000 119,642,000 115,229,000 122,194,000 111,362,000 109,586,000 103,921,000 107,957,000 99,488,000 100,209,000 97,722,000 96,194,000 89,316,000 90,777,000 86,375,000         
      yoy
    17.54% 39.80% 35.57% 28.88% 21.47% 2.11% -1.78% 12.46% 12.63% 15.72% 19.84% 13.32% 12.13% 2.58% 21.44% 19.49% 14.50% 34.38% 22.02% 10.57% 4.57% 2.80% 0.39% 22.48% 5.12% 11.53% 4.05% -4.78% -4.09% -1.67% 3.10% 3.38% -1.40% -4.61% -3.02% 1.66% 4.44% 7.80% 8.22% 9.95% 15.14% 19.38% 9.89% 9.18% 7.60% 2.19% -1.07% -16.50% -4758.47% -27.61% -28.70% -28.26% -101.43% -16.49% -14.91% -7.31% -6.09% -0.31% 5.51% 5.25% 6.13% 7.79% 9.06% 5.53% -1.89% -5.68% -8.52% -0.58% 1.90% 3.95% 6.94% 5.50% 11.97% 9.38% 9.18% 10.88% 13.19% 11.94% 9.36% 6.34% 12.23% 11.39% 10.39% 13.14%             
      qoq
    1.15% 5.24% -0.28% 10.72% 20.30% 2.06% -5.20% 4.36% 1.13% -1.83% 8.54% 4.52% 3.91% 1.66% 2.64% 3.42% -4.94% 20.35% 1.00% -0.90% 11.56% 9.28% -8.48% -6.28% 9.67% 6.72% 11.67% -19.57% 16.36% -0.44% 2.19% -18.98% 19.29% 4.40% 2.47% -22.73% 15.40% 6.14% 7.42% -20.62% 19.11% 6.55% 9.14% -16.87% 23.49% -1.92% 8.44% -18.07% 17.28% -5.05% -8.47% -4670.87% -101.82% -6.48% -7.90% -8.74% 6.24% -4.71% 0.33% -7.54% 12.77% 0.85% 0.09% -6.76% 14.54% 2.04% -3.15% -13.32% 10.12% -1.03% 5.24% -11.15% 12.33% 1.81% 3.83% -5.70% 9.73% 1.62% 5.45% -3.74% 8.51% -0.72% 2.54% 1.59% 7.70% -1.61% 5.10%          
      costs of revenue:
                                                                                                    
      cost of software licenses
    3,860,000 2,833,000 2,987,000 2,925,000 3,014,000 2,700,000 2,497,000 2,731,000 3,155,000 2,732,000 2,814,000 2,452,000 2,574,000 2,477,000 2,583,000 2,609,000 1,508,000 1,574,000 1,038,000 1,151,000 1,171,000 1,103,000 810,000 1,389,000 1,598,000 1,204,000 925,000 1,167,000 1,198,000 1,077,000 1,233,000 1,261,000 1,405,000 1,337,000 1,422,000 1,588,000 1,317,000 1,424,000 1,233,000 1,482,000 1,453,000 1,441,000 1,365,000 1,720,000 1,445,000 1,805,000 1,139,000 2,007,000 1,856,000 1,587,000 1,356,000 2,239,000 -376,000 1,927,000 2,273,000 2,288,000 1,939,000 2,321,000 2,321,000 2,381,000 2,290,000 2,025,000 1,619,000 1,989,000 2,174,000 1,758,000 1,527,000 2,317,000 1,857,000 3,219,000 2,164,000 2,296,000 2,389,000 2,109,000 1,880,000 1,672,000 1,380,000 2,034,000 1,817,000 2,214,000 2,501,000 1,843,000 1,855,000 1,951,000 1,990,000 2,092,000 2,299,000 2,592,000 2,315,000 2,098,000 2,434,000 2,326,000 2,778,000 2,505,000 2,586,000 2,882,000 
      cost of maintenance, saas, and professional services
    33,183,000 33,919,000 33,764,000 32,884,000                                                                                             
      amortization of acquired intangibles
    9,483,000 10,784,000 10,537,000 10,422,000 7,658,000 6,307,000 7,398,000 7,859,000 7,916,000 7,995,000 7,994,000 6,264,000 5,487,000 5,558,000 5,573,000 5,458,000 4,217,000 3,599,000 3,599,000 3,521,000 2,923,000 1,664,000 1,664,000 1,646,000 6,887,000 7,458,000 6,106,000 5,433,000 5,508,000 5,509,000 5,899,000 5,818,000 5,979,000 5,768,000 4,683,000 3,678,000 3,678,000 3,940,000 3,939,000 3,939,000 4,025,000 4,079,000 4,093,000 4,633,000 1,106,000 834,000 530,000 529,000 529,000 529,000 143,000 286,000 -9,754,000 3,648,000 3,631,000 3,734,000                         1,715,250 2,568,000 2,296,000 1,997,000 1,871,000 1,809,000 1,837,000 1,559,000         
      total costs of revenue
    46,526,000 47,536,000 47,288,000 46,231,000 36,538,000 29,064,000 32,071,000 32,809,000 33,663,000 32,919,000 33,778,000 26,217,000 23,531,000 23,796,000 23,957,000 23,212,000 21,080,000 20,068,000 19,310,000 17,991,000 18,231,000 14,738,000 14,259,000 14,886,000 20,766,000 20,825,000 17,611,000 16,039,000 16,731,000 16,696,000 16,643,000 16,903,000 17,959,000 18,075,000 17,367,000 15,758,000 16,538,000 17,189,000 16,235,000 15,750,000 15,237,000 15,132,000 15,746,000 17,628,000 11,139,000 7,861,000 7,378,000 7,881,000 8,095,000 8,519,000 8,489,000 11,382,000 -23,205,000 20,241,000 25,781,000 25,402,000 26,198,000 26,816,000 26,157,000 24,124,000 25,381,000 24,709,000 25,231,000 24,001,000 23,704,000 22,526,000 22,593,000 24,378,000 23,848,000 22,735,000 22,696,000 22,610,000 23,567,000 21,520,000 21,244,000 20,425,000 20,554,000 19,333,000 18,935,000 17,988,000                 
      gross profit
    206,140,000 202,259,000 190,067,000 191,784,000 178,423,000 149,622,000 143,006,000 151,876,000 143,307,000 142,073,000 144,473,000 138,009,000 133,596,000 127,421,000 124,790,000 121,710,000 119,048,000 127,349,000 103,178,000 103,289,000 104,154,000 94,961,000 86,124,000 94,797,000 96,272,000 85,891,000 82,384,000 73,510,000 94,602,000 78,987,000 79,459,000 77,144,000 98,120,000 79,235,000 75,846,000 75,212,000 101,186,000 84,829,000 79,883,000 73,731,000 97,481,000 79,505,000 73,071,000 63,753,000 86,755,000 71,413,000 73,449,000 66,657,000 82,885,000 69,059,000 73,216,000 77,887,000 21,252,000 86,932,000 88,815,000 99,024,000 110,142,000 101,518,000 108,527,000 110,113,000 119,799,000 104,028,000 102,425,000 103,546,000 113,093,000 96,907,000 94,454,000 96,482,000 115,583,000 103,885,000 105,246,000 98,957,000 113,258,000 100,284,000 98,398,000 94,804,000 101,640,000 92,029,000 90,651,000 85,933,000                 
      yoy
    15.53% 35.18% 32.91% 26.28% 24.50% 5.31% -1.02% 10.05% 7.27% 11.50% 15.77% 13.39% 12.22% 0.06% 20.95% 17.83% 14.30% 34.11% 19.80% 8.96% 8.19% 10.56% 4.54% 28.96% 1.77% 8.74% 3.68% -4.71% -3.59% -0.31% 4.76% 2.57% -3.03% -6.59% -5.05% 2.01% 3.80% 6.70% 9.32% 15.65% 12.36% 11.33% -0.51% -4.36% 4.67% 3.41% 0.32% -14.42% 290.01% -20.56% -17.56% -21.35% -80.70% -14.37% -18.16% -10.07% -8.06% -2.41% 5.96% 6.34% 5.93% 7.35% 8.44% 7.32% -2.15% -6.72% -10.25% -2.50% 2.05% 3.59% 6.96% 4.38% 11.43% 8.97% 8.55% 10.32%                     
      qoq
    1.92% 6.41% -0.90% 7.49% 19.25% 4.63% -5.84% 5.98% 0.87% -1.66% 4.68% 3.30% 4.85% 2.11% 2.53% 2.24% -6.52% 23.43% -0.11% -0.83% 9.68% 10.26% -9.15% -1.53% 12.09% 4.26% 12.07% -22.30% 19.77% -0.59% 3.00% -21.38% 23.83% 4.47% 0.84% -25.67% 19.28% 6.19% 8.34% -24.36% 22.61% 8.81% 14.62% -26.51% 21.48% -2.77% 10.19% -19.58% 20.02% -5.68% -6.00% 266.49% -75.55% -2.12% -10.31% -10.09% 8.50% -6.46% -1.44% -8.09% 15.16% 1.57% -1.08% -8.44% 16.70% 2.60% -2.10% -16.53% 11.26% -1.29% 6.36% -12.63% 12.94% 1.92% 3.79% -6.73% 10.44% 1.52% 5.49%                  
      gross margin %
    81.59% 80.97% 80.08% 80.58% 83.00% 83.73% 81.68% 82.24% 80.98% 81.19% 81.05% 84.04% 85.02% 84.26% 83.89% 83.98% 84.96% 86.39% 84.24% 85.17% 85.10% 86.57% 85.80% 86.43% 82.26% 80.49% 82.39% 82.09% 84.97% 82.55% 82.68% 82.03% 84.53% 81.43% 81.37% 82.68% 85.95% 83.15% 83.11% 82.40% 86.48% 84.01% 82.27% 78.34% 88.62% 90.08% 90.87% 89.43% 91.10% 89.02% 89.61% 87.25% -1088.17% 81.11% 77.50% 79.58% 80.78% 79.10% 80.58% 82.03% 82.52% 80.81% 80.24% 81.18% 82.67% 81.14% 80.70% 79.83% 82.90% 82.04% 82.26% 81.40% 82.78% 82.33% 82.24% 82.27% 83.18% 82.64% 82.72% 82.69% 0% 0% 0% 0% 0% 0% 0% 0% NaN% NaN% NaN% NaN% NaN% NaN% NaN% NaN% 
      operating expenses:
                                                                                                    
      sales and marketing
    58,190,000 51,850,000 49,677,000 51,296,000 50,429,000 37,141,000 37,889,000 39,111,000 43,563,000 38,612,000 40,147,000 33,754,000 39,992,000 34,595,000 32,704,000 33,469,000 37,422,000 29,737,000 29,262,000 29,469,000 32,013,000 22,186,000 21,716,000 24,198,000 29,369,000 25,177,000 24,832,000 22,323,000 28,198,000 21,752,000 21,658,000 21,428,000 26,229,000 23,159,000 21,236,000 25,721,000 32,853,000 29,852,000 29,138,000 29,658,000 32,260,000 30,004,000 31,852,000 30,751,000 30,071,000 22,477,000 24,359,000 24,509,000 26,911,000 24,554,000 25,890,000 31,535,000 -203,000 33,034,000 41,528,000 47,247,000 51,816,000 45,251,000 44,312,000 44,698,000 46,081,000 39,362,000 40,140,000 43,206,000 48,896,000 45,511,000 43,505,000 44,315,000 53,581,000 48,367,000 48,158,000 45,842,000 53,402,000 47,644,000 45,745,000 44,645,000 54,050,000 44,609,000 44,983,000 42,797,000 43,346,000 37,910,000 37,560,000 38,329,000 38,581,000 35,310,000 36,100,000 36,180,000         
      product development
    49,888,000 49,432,000 46,570,000 46,375,000 41,199,000 34,720,000 35,435,000 34,988,000 34,005,000 33,138,000 34,820,000 30,438,000 28,602,000 28,650,000 28,643,000 28,673,000 26,759,000 25,616,000 26,415,000 24,548,000 24,482,000 20,676,000 21,787,000 21,654,000 23,868,000 23,126,000 21,688,000 19,890,000 20,334,000 19,338,000 19,822,000 20,245,000 21,243,000 19,620,000 18,791,000 17,334,000 22,787,000 21,706,000 22,297,000 21,797,000 21,391,000 20,422,000 22,290,000 22,821,000 13,397,000 14,975,000 15,480,000 15,113,000 14,428,000 14,615,000 14,671,000 15,786,000 -10,574,000 20,949,000 22,727,000 22,395,000 20,616,000 19,107,000 20,137,000 20,859,000 22,162,000 21,941,000 23,153,000 23,387,000 22,942,000 22,378,000 23,023,000 24,919,000 25,489,000 21,076,000 20,530,000 20,693,000 19,332,000 19,829,000 20,389,000 20,795,000 19,708,000 19,288,000 19,346,000 19,007,000 15,322,000 15,957,000 15,393,000 16,399,000 15,580,000 14,907,000 15,275,000 14,609,000 11,944,000 13,010,000 12,802,000 12,487,000 10,373,000 10,459,000 10,563,000 10,718,000 
      general and administrative
    28,647,000 28,308,000 25,637,000 25,623,000 25,688,000 20,503,000 21,983,000 21,344,000 22,111,000 20,791,000 21,469,000 18,786,000 21,537,000 20,141,000 19,207,000 16,991,000 18,793,000 16,451,000 16,460,000 13,424,000 15,302,000 13,514,000 12,440,000 12,748,000 14,915,000 13,506,000 12,654,000 12,285,000 13,380,000 12,218,000 12,190,000 11,262,000 12,401,000 11,164,000 11,606,000 10,568,000 10,477,000 11,411,000 12,264,000 12,380,000 15,229,000 14,076,000 13,673,000 14,315,000 13,056,000 12,162,000 11,428,000 11,727,000 13,604,000 13,660,000 14,064,000 14,682,000 14,104,000 14,428,000 18,069,000 15,452,000 16,163,000 20,342,000 13,742,000 11,852,000 13,638,000 11,937,000 13,448,000 12,782,000 13,489,000 17,717,000 13,830,000 14,575,000 18,612,000 14,966,000 14,605,000 13,900,000 15,022,000 13,188,000 19,029,000 15,031,000 16,358,000 13,981,000 13,034,000 13,347,000 10,374,000 10,284,000 11,012,000 10,652,000 9,566,000 9,674,000 9,837,000 9,676,000 8,022,000 8,630,000 8,367,000 9,140,000 8,088,000 7,405,000 7,153,000 7,387,000 
      cyber vulnerability response expenses
    531,500 659,000 730,000 737,000                                                                                             
      restructuring expenses
    4,130,000 907,000 1,043,000 7,029,000 7,146,000 308,000 651,000 2,349,000 2,177,000 843,000 3,990,000 1,397,000 95,000 130,000 143,000 511,000 5,175,000 40,000 -64,000 1,157,000 4,080,000 91,000 695,000 1,040,000 2,338,000 801,000 2,777,000 415,000    1,821,000 3,486,000 923,000 662,000 17,139,000 1,463,000 -36,000 331,000 -66,000 4,274,000 2,561,000 3,810,000 2,344,000 265,000 1,680,000 124,000 196,000 2,856,000 5,401,000 2,766,000 960,000 -3,075,000 2,787,000 8,496,000          1,309,250 -211,000                               
      acquisition-related expenses
    282,000 814,000 1,731,000 2,490,000 13,995,000 1,864,000 548,000 702,000 271,000 699,000 1,991,000 1,743,000 787,000 168,000 2,736,000 912,000 1,381,000 1,481,000 844,000 396,000 2,198,000 1,125,000  314,000 298,000 253,000 1,107,000  130,000 42,000 43,000 43,000 614,000 751,000 44,000 49,000 791,000 53,000 324,000 72,000 1,059,000 662,000 1,010,000 1,506,000 2,714,000 572,000 1,630,000 946,000 975,000 957,000 1,272,000     215,000      53,000  415,000 110,000 110,000 110,000 110,000         15,000 3,000 297,000 1,534,000 653,000 1,776,000 974,000              
      total operating expenses
    167,766,000 158,385,000 151,451,000 159,358,000 156,923,000 109,273,000 115,858,000 116,870,000 120,770,000 112,702,000 121,446,000 102,421,000 103,153,000 95,400,000 84,555,000 92,278,000 98,690,000 81,303,000 80,896,000 75,873,000 85,640,000 61,768,000 60,815,000 64,085,000 102,298,000 69,931,000 67,643,000 58,101,000 70,343,000 56,804,000 57,671,000 59,376,000 69,311,000 58,936,000 55,562,000 73,990,000 163,550,000 71,223,000 67,539,000 67,026,000 77,399,000 70,911,000 75,806,000 74,939,000 59,728,000 51,982,000 53,169,000 52,655,000 58,985,000 59,398,000 58,830,000 63,172,000 -4,056,000 72,935,000 92,587,000 87,130,000 90,956,000 88,006,000 81,317,000 81,797,000 86,964,000 87,559,000 79,680,000 107,925,000 87,313,000 87,815,000 82,912,000 91,763,000 107,059,000 85,778,000 84,642,000 81,809,000 97,487,000 82,481,000 87,109,000 82,451,000 92,161,000 79,842,000 79,644,000 78,068,000                 
      income from operations
    38,374,000 43,874,000 38,616,000 32,426,000 21,500,000 40,349,000 27,148,000 35,006,000 22,537,000 29,371,000 23,027,000 35,588,000 30,443,000 32,021,000 40,235,000 29,432,000 20,358,000 46,046,000 22,282,000 27,416,000 18,514,000 33,193,000 25,309,000 30,712,000 -6,026,000 15,960,000 14,741,000 15,409,000 24,259,000 22,183,000 21,788,000 17,768,000 28,809,000 20,299,000 20,284,000 1,222,000 -62,364,000 13,606,000 12,344,000 6,705,000 20,082,000 8,594,000 -2,735,000 -11,186,000 27,027,000 19,431,000 20,280,000 14,002,000 23,900,000 9,661,000 14,386,000 14,715,000 25,308,000 13,997,000 -3,772,000 11,894,000 19,186,000 13,512,000 27,210,000 28,316,000 32,835,000 16,469,000 22,745,000 -4,379,000 25,780,000 9,092,000 11,542,000 4,719,000 8,524,000 18,107,000 20,604,000 17,148,000 15,771,000 17,803,000 11,289,000 12,353,000 9,479,000 12,187,000 11,007,000 7,865,000 19,233,000 12,855,000 17,319,000 14,358,000 15,863,000 12,698,000 11,470,000 6,333,000 12,262,000 10,063,000 9,165,000 5,262,000 9,217,000 7,322,000 8,418,000 3,267,000 
      yoy
    78.48% 8.74% 42.24% -7.37% -4.60% 37.38% 17.90% -1.64% -25.97% -8.28% -42.77% 20.92% 49.54% -30.46% 80.57% 7.35% 9.96% 38.72% -11.96% -10.73% -407.24% 107.98% 71.69% 99.31% -124.84% -28.05% -32.34% -13.28% -15.79% 9.28% 7.41% 1354.01% -146.19% 49.19% 64.32% -81.77% -410.55% 58.32% -551.33% -159.94% -25.70% -55.77% -113.49% -179.89% 13.08% 101.13% 40.97% -4.85% -5.56% -30.98% -481.39% 23.72% 31.91% 3.59% -113.86% -58.00% -41.57% -17.95% 19.63% -746.63% 27.37% 81.14% 97.06% -192.80% 202.44% -49.79% -43.98% -72.48% -45.95% 1.71% 82.51% 38.82% 66.38% 46.08% 2.56% 57.06% -50.71% -5.20% -36.45% -45.22% 21.24% 1.24% 50.99% 126.72% 29.37% 26.19% 25.15% 20.35% 33.04% 37.44% 8.87% 61.07%     
      qoq
    -12.54% 13.62% 19.09% 50.82% -46.71% 48.63% -22.45% 55.33% -23.27% 27.55% -35.30% 16.90% -4.93% -20.42% 36.70% 44.57% -55.79% 106.65% -18.73% 48.08% -44.22% 31.15% -17.59% -609.66% -137.76% 8.27% -4.34% -36.48% 9.36% 1.81% 22.62% -38.32% 41.92% 0.07% 1559.90% -101.96% -558.36% 10.22% 84.10% -66.61% 133.67% -414.22% -75.55% -141.39% 39.09% -4.19% 44.84% -41.41% 147.39% -32.84% -2.24% -41.86% 80.81% -471.08% -131.71% -38.01% 41.99% -50.34% -3.91% -13.76% 99.37% -27.59% -619.41% -116.99% 183.55% -21.23% 144.59% -44.64% -52.92% -12.12% 20.15% 8.73% -11.41% 57.70% -8.61% 30.32% -22.22% 10.72% 39.95% -59.11% 49.61% -25.78% 20.62% -9.49% 24.93% 10.71% 81.11% -48.35% 21.85% 9.80% 74.17% -42.91% 25.88% -13.02% 157.67%  
      operating margin %
    15.19% 17.56% 16.27% 13.62% 10.00% 22.58% 15.51% 18.95% 12.73% 16.78% 12.92% 21.67% 19.37% 21.18% 27.05% 20.31% 14.53% 31.24% 18.19% 22.61% 15.13% 30.26% 25.21% 28.00% -5.15% 14.96% 14.74% 17.21% 21.79% 23.18% 22.67% 18.89% 24.82% 20.86% 21.76% 1.34% -52.97% 13.34% 12.84% 7.49% 17.82% 9.08% -3.08% -13.75% 27.61% 24.51% 25.09% 18.79% 26.27% 12.45% 17.61% 16.48% -1295.85% 13.06% -3.29% 9.56% 14.07% 10.53% 20.20% 21.09% 22.62% 12.79% 17.82% -3.43% 18.85% 7.61% 9.86% 3.90% 6.11% 14.30% 16.10% 14.11% 11.53% 14.62% 9.44% 10.72% 7.76% 10.94% 10.04% 7.57% 17.82% 12.92% 17.28% 14.69% 16.49% 14.22% 12.64% 7.33% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% 
      other income:
                                                                                                    
      interest expense
    -16,546,000 -17,737,000 -18,138,000 -18,429,000 -10,896,000 -6,765,000 -7,007,000 -7,344,000 -7,886,000 -8,532,000 -8,514,000 -5,848,000 -4,422,000 -4,009,000 -3,656,000 -3,703,000 -6,420,000 -6,510,000 -4,601,000 -2,514,000 -2,478,000 -2,302,000 -2,598,000 -2,792,000 -2,993,000 -3,321,000 -2,210,000 -1,389,000 -1,375,000 -1,337,000 -1,272,000 -1,165,000 -1,176,000 -1,221,000 -1,152,000 -1,082,000 -934,000 -1,174,000 -1,013,000 -1,057,000 -980,000 -987,000 -947,000 -1,139,000                                                     
      interest income and other
    718,000 260,000 294,000 487,000 1,286,000 1,896,000 928,000 624,000 643,000 788,000 592,000 515,000 423,000 247,000 155,000 589,000 555,000 99,000 4,000 119,000 1,052,000 110,000 122,000 211,000 193,000 377,000 344,000 229,000 259,000 322,000 231,000 408,000 204,000 239,000 257,000 221,000 153,000 260,000 264,000 162,000 293,000 450,000 454,000 515,000 324,000 -1,922,000 596,000 513,000 55,000 371,000 244,000 531,000 218,000 1,017,000 743,000 592,000 388,000 309,000 714,000 588,000 455,000 615,000 581,000 1,481,000 510,000 560,000 602,000 1,073,000 2,340,000 2,230,000 2,659,000 3,155,000 3,011,000 2,602,000 2,331,000 1,918,000 2,107,000 1,931,000 1,711,000 1,795,000 1,587,000 1,620,000 1,160,000 890,000 506,750 606,000 650,000 771,000 639,250 811,000 835,000 911,000     
      foreign currency loss
    -290,000 -191,000 -908,000 -1,182,000 360,000 -1,201,000 -941,000 -679,000 -1,122,000 -675,000 -496,000 -331,000    -366,000 -294,000 -128,000 -621,000 -257,000 -461,000 -770,000 -371,000 -816,000 -751,000 -774,000 -451,000 -843,000                 -679,000 -535,000 -725,000 -507,000 -452,250 -194,000 -536,000 -1,079,000 -368,500 -660,000 -494,000 -322,000           -1,062,000    -474,000 -89,000 -161,000 -332,000 -710,000 -828,000 -350,000 -263,000 -1,193,000 -1,098,000                -831,000 
      total other expense
    -16,118,000 -17,668,000 -18,752,000 -19,124,000 -9,250,000 -6,070,000 -7,020,000 -7,399,000 -8,365,000 -8,419,000 -8,418,000 -5,664,000 -3,667,000 -4,339,000 -3,390,000 -3,480,000 -6,159,000 -6,539,000 -5,218,000 -2,652,000 -1,887,000 -2,962,000 -2,847,000 -3,397,000 -3,551,000 -3,718,000 -2,317,000 -2,003,000             -1,142,000 -1,165,000                                                       
      income before income taxes
    22,256,000 26,206,000 19,864,000 13,302,000 12,250,000 34,279,000 20,128,000 27,607,000 14,172,000 20,952,000 14,609,000 29,924,000 26,776,000 27,682,000 36,845,000 25,952,000 14,199,000 39,507,000 17,064,000 24,764,000 16,627,000 30,231,000 22,462,000 27,315,000 -9,577,000 12,242,000 12,424,000 13,406,000 22,071,000 20,222,000 20,504,000 16,183,000 28,081,000 18,899,000 18,732,000 -125,000 -63,461,000 12,318,000 10,983,000 4,880,000 -1,646,500 7,429,000 -3,760,000 -10,253,000                                                     
      provision for income taxes
    -3,489,000 6,793,000 2,835,000 2,356,000 11,103,000 5,815,000 3,940,000 4,968,000 -1,163,000 1,854,000 2,519,000 6,250,000 3,068,000 5,885,000 7,735,000 5,498,000 -727,000 8,531,000 3,507,000 5,803,000 -1,034,000 6,254,000 5,494,000 6,199,000 -4,837,000 -1,315,000 4,243,000 4,004,000 3,641,000 3,476,000 5,101,000 3,271,000 11,652,000 7,727,000 8,391,000 400,000 10,332,000 4,742,000 3,708,000 1,664,000 28,411,000 11,555,000 -9,529,000 -9,282,000 12,208,000 5,879,000 7,352,000 2,908,000 8,988,000 2,634,000 5,952,000 5,044,000 6,875,000 6,378,000  4,675,000 7,591,000 4,137,000 9,459,000 7,756,000 10,362,000 5,505,000 7,606,000 -617,000 8,570,000 3,384,000 4,175,000 2,296,000 3,807,000 8,210,000 8,318,000 7,378,000 6,517,000 7,026,000 4,519,000 4,705,000 4,332,000 4,985,000 3,807,000 2,783,000 6,757,000 801,000 5,990,000 4,383,000 5,108,000 4,281,000 3,632,000 2,085,000 3,779,000 3,141,000 2,867,000 1,816,000 2,948,000 2,351,000 2,469,000 1,055,000 
      net income
    25,745,000 19,413,000 17,029,000 10,946,000 1,147,000 28,464,000 16,188,000 22,639,000 15,335,000 19,098,000 12,090,000 23,674,000 23,708,000 21,797,000 29,110,000 20,454,000 14,926,000 30,976,000 13,557,000 18,961,000 17,661,000 23,977,000 16,968,000 21,116,000 -4,740,000 13,557,000 8,181,000 9,402,000 18,430,000 16,746,000 15,403,000 12,912,000 16,429,000 11,172,000 10,341,000 -525,000 -73,793,000 7,576,000 7,275,000 3,216,000 -9,471,000 -4,126,000 5,769,000 -971,000 14,464,000 11,095,000 12,799,000 11,100,000 15,036,000 24,843,000 3,910,000 31,118,000 36,025,000 5,838,000 -1,908,000 7,489,000 11,680,000 8,601,000 17,960,000 20,521,000 21,276,000 9,244,000 19,058,000 -1,006,000 16,676,000 5,521,000 6,907,000 3,652,000 6,452,000 12,537,000 14,471,000 12,836,000 12,104,000 13,047,000 8,391,000 8,738,000 6,904,000 8,870,000 7,718,000 5,779,000 14,033,000 13,357,000 12,229,000 9,314,000 10,856,000 8,520,000 8,085,000 4,640,000 8,817,000 7,329,000 6,690,000 4,238,000 6,878,000 5,486,000 5,762,000 2,461,000 
      yoy
    2144.55% -31.80% 5.20% -51.65% -92.52% 49.04% 33.90% -4.37% -35.32% -12.38% -58.47% 15.74% 58.84% -29.63% 114.72% 7.87% -15.49% 29.19% -20.10% -10.21% -472.59% 76.86% 107.41% 124.59% -125.72% -19.04% -46.89% -27.18% 12.18% 49.89% 48.95% -2559.43% -122.26% 47.47% 42.14% -116.32% 679.15% -283.62% 26.11% -431.20% -165.48% -137.19% -54.93% -108.75% -3.80% -55.34% 227.34% -64.33% -58.26% 325.54% -304.93% 315.52% 208.43% -32.12% -110.62% -63.51% -45.10% -6.96% -5.76% -2139.86% 27.58% 67.43% 175.92% -127.55% 158.46% -55.96% -52.27% -71.55% -46.70% -3.91% 72.46% 46.90% 75.32% 47.09% 8.72% 51.20% -50.80% -33.59% -36.89% -37.95% 29.26% 56.77% 51.26% 100.73% 23.13% 16.25% 20.85% 9.49% 28.19% 33.59% 16.11% 72.21%     
      qoq
    32.62% 14.00% 55.57% 854.32% -95.97% 75.83% -28.50% 47.63% -19.70% 57.97% -48.93% -0.14% 8.77% -25.12% 42.32% 37.04% -51.81% 128.49% -28.50% 7.36% -26.34% 41.31% -19.64% -545.49% -134.96% 65.71% -12.99% -48.99% 10.06% 8.72% 19.29% -21.41% 47.06% 8.04% -2069.71% -99.29% -1074.04% 4.14% 126.21% -133.96% 129.54% -171.52% -694.13% -106.71% 30.37% -13.31% 15.31% -26.18% -39.48% 535.37% -87.43% -13.62% 517.08% -405.97% -125.48% -35.88% 35.80% -52.11% -12.48% -3.55% 130.16% -51.50% -1994.43% -106.03% 202.05% -20.07% 89.13% -43.40% -48.54% -13.36% 12.74% 6.05% -7.23% 55.49% -3.97% 26.56% -22.16% 14.93% 33.55% -58.82% 5.06% 9.22% 31.30% -14.20% 27.42% 5.38% 74.25% -47.37% 20.30% 9.55% 57.86% -38.38% 25.37% -4.79% 134.13%  
      net income margin %
    10.19% 7.77% 7.17% 4.60% 0.53% 15.93% 9.25% 12.26% 8.67% 10.91% 6.78% 14.42% 15.09% 14.41% 19.57% 14.11% 10.65% 21.01% 11.07% 15.63% 14.43% 21.86% 16.90% 19.25% -4.05% 12.70% 8.18% 10.50% 16.55% 17.50% 16.03% 13.73% 14.15% 11.48% 11.09% -0.58% -62.68% 7.43% 7.57% 3.59% -8.40% -4.36% 6.50% -1.19% 14.78% 14.00% 15.84% 14.89% 16.53% 32.02% 4.79% 34.86% -1844.60% 5.45% -1.66% 6.02% 8.57% 6.70% 13.33% 15.29% 14.65% 7.18% 14.93% -0.79% 12.19% 4.62% 5.90% 3.02% 4.63% 9.90% 11.31% 10.56% 8.85% 10.71% 7.01% 7.58% 5.65% 7.97% 7.04% 5.56% 13.00% 13.43% 12.20% 9.53% 11.29% 9.54% 8.91% 5.37% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% 
      earnings per share:
                                                                                                    
      basic
    0.6 0.45 0.4 0.25 0.03 0.66 0.37 0.52 0.35 0.44 0.28 0.55 0.55 0.5 0.67 0.47 0.34 0.71 0.31 0.43 0.4 0.53 0.38 0.47 -0.11 0.3 0.18 0.21 0.4 0.37 0.34 0.28 0.35 0.23 0.21 -0.01 -1.49 0.16 0.15 0.06 0.003 -0.08 0.11 -0.02           -0.03 0.12 0.18 0.13 0.27 0.31 0.11 0.21 0.45 -0.02 0.42 0.14 0.17 0.09 0.17 0.31 0.35 0.3 0.29 0.31 0.2 0.21 0.17 0.22 0.19 0.14 0.35 0.34 0.33 0.25 0.3 0.24 0.22 0.13 0.135 0.21 0.2 0.13 0.095 0.15 0.16  
      diluted
    0.59 0.44 0.39 0.24 0.02 0.65 0.37 0.51 0.34 0.42 0.27 0.53 0.54 0.5 0.66 0.46 0.33 0.7 0.3 0.42 0.39 0.53 0.37 0.46 -0.11 0.3 0.18 0.21 0.41 0.37 0.33 0.27 0.34 0.23 0.21 -0.01 -1.49 0.15 0.14 0.06 0.003 -0.08 0.11 -0.02           -0.03 0.12 0.18 0.13 0.26 0.29 0.11 0.21 0.43 -0.02 0.41 0.13 0.17 0.09 0.16 0.3 0.33 0.29 0.27 0.3 0.19 0.2 0.16 0.21 0.18 0.14 0.33 0.31 0.3 0.23 0.28 0.22 0.21 0.12 0.123 0.19 0.18 0.12 0.088 0.14 0.15  
      weighted-average shares outstanding:
                                                                                                    
      basic
    42,996 42,988 43,053 43,256 43,268 42,872 43,213 43,802 43,456 43,452 43,343 43,300 43,475 43,211 43,575 43,981 43,916 43,762 43,818 44,108 44,886 45,036 44,889 44,897 44,791 44,716 44,611 44,956 45,561 45,130 45,531 46,529 48,129 48,071 48,221 48,733 49,481 48,611 49,873 50,810 50,391 50,120 50,342 50,668 50,840 50,383 51,049 51,494 54,516 53,532 54,919 57,901 62,881 63,469 63,051 62,145 65,705 65,861 66,897 66,986 63,957 43,224 42,537 41,079 40,103 40,117 39,997 39,941 41,035 40,528 41,483 42,238 41,554 41,712 41,178 41,069 40,976 41,137 41,062 40,499 38,227 38,947 37,433 36,573 36,031 36,220 36,046 35,644  34,604 33,844 33,411  35,962 35,749  
      diluted
    44,019 43,717 44,156 44,887 44,427 43,711 43,964 44,826 44,658 44,981 44,470 44,353 44,247 43,935 44,253 44,708 44,620 44,502 44,472 44,652 45,321 45,364 45,267 45,515 45,340 45,303 45,287 45,286 46,135 45,576 46,087 47,476 48,516 48,370 48,490 48,733 49,481 49,135 50,354 51,440 50,391 50,120 51,085 50,668 51,466 50,931 51,673 52,165 55,379 54,389 55,736 58,752 63,741 64,105 63,051 63,130 67,540 67,280 69,246 69,659 66,212 44,424 44,237 41,079 41,041 41,261 40,697 40,521 42,677 42,156 43,238 44,174 43,943 44,153 43,636 43,437 43,269 42,901 43,473 42,465 41,571 42,501 40,979 39,721 39,010 38,853 39,233 38,955  38,182 37,829 35,576  38,251 39,117  
      cash dividends declared per common share
        0.005 0.175 0.175 0.175 0.175 0.175 0.175 0.175 0.175 0.175 0.175 0.175 0.175 0.175 0.175 0.175 0.175 0.165 0.165 0.165 0.165 0.155 0.155 0.155 0.155 0.14 0.14 0.14 0.14 0.125 0.125 0.125                                                             
      maintenance and services
        141,559,000 120,836,000 121,098,000 120,585,000 120,700,000 124,448,000 121,844,000 106,658,000 103,973,000 103,599,000 103,933,000 102,172,000 98,892,000 95,487,000 92,381,000 87,963,000 84,942,000 82,185,000 80,720,000 79,054,000 77,702,000 76,030,000 70,267,000 66,747,000 68,182,000 68,479,000 69,663,000 68,704,000 70,116,000 68,781,000 67,621,000 66,648,000 69,227,000 68,394,000 67,331,000 65,526,000 68,262,000 62,797,000 60,095,000 56,150,000 56,738,000 52,881,000 52,839,000 52,274,000 53,588,000 51,912,000 52,358,000 56,603,000 -13,075,000 76,190,000 84,923,000 82,934,000 87,633,000 89,621,000 89,267,000 82,901,000 88,705,000 83,989,000 83,428,000 80,430,000 84,769,000 80,260,000 78,534,000 75,008,000 83,329,000 80,622,000 82,927,000 76,465,000 83,040,000 77,793,000 75,087,000 70,500,000 72,782,000 69,066,000 68,229,000 61,141,000 63,873,000 61,502,000 62,988,000 60,167,000 59,396,000 56,452,000 53,872,000 52,480,000 52,046,000 50,504,000 50,476,000 46,368,000 46,977,000 46,141,000 44,279,000 41,771,000 
      cost of maintenance and services
        25,866,000 20,057,000 22,176,000 22,219,000 22,592,000 22,192,000 22,970,000 17,501,000 15,470,000 15,761,000 15,801,000 15,145,000 15,355,000 14,895,000 14,673,000 13,319,000 14,137,000 11,971,000 11,785,000 11,851,000 12,281,000 12,163,000 10,580,000 9,439,000 10,025,000 10,110,000 9,511,000 9,824,000 10,575,000 10,970,000 11,262,000 10,492,000 11,543,000 11,825,000 11,063,000 10,329,000 9,759,000 9,612,000 10,288,000 11,275,000 8,588,000 5,222,000 5,709,000 5,345,000 5,710,000 6,403,000 6,990,000 8,857,000 -13,075,000 14,666,000 19,877,000 19,380,000 20,402,000 20,529,000 19,906,000 17,768,000 18,204,000 17,845,000 18,327,000 16,914,000 16,680,000 15,957,000 15,997,000 17,333,000 17,407,000 16,558,000 17,715,000 17,641,000 18,566,000 16,915,000 16,871,000 16,262,000 16,796,000 15,044,000 15,125,000 14,250,000 13,990,000 13,492,000 13,800,000 14,036,000 12,743,000 12,826,000 13,959,000 12,826,000 13,604,000 13,088,000 12,790,000 13,117,000 14,160,000 14,146,000 14,126,000 14,015,000 
      cyber incident and vulnerability response expenses
        691,000 927,000 3,036,000 987,000 1,038,000 951,000 1,483,000                                                                                      
      gain on sale of assets held for sale
                  -10,770,000                                                                                  
      cyber incident
               2,692,000                                                                                     
      foreign currency gain
                -208,000 -577,000 111,000              -504,250 -946,000 -243,000 -828,000 -390,250 -418,000 -657,000 -486,000 -479,000 -374,000 -612,000 -930,000 99,250 -628,000 -532,000 1,557,000             -303,000 -1,083,000 -505,000 -627,000 -1,652,000 -2,335,000 3,338,000 1,275,000    156,000 -38,250 410,000                           
      fees related to shareholder activist
                                  214,000 1,258,000                                                                 
      the company adopted asc 606 effective december 1, 2018 using the full retrospective method. see note 1. nature of business and basis of presentation for further information.
                                                                                                    
      restructuring expense
                                -131,000 135,000 426,000                          1,156,750 1,369,000 1,144,000 2,114,000 2,467,000 11,533,000 203,000 25,771,000   -30,000 5,478,000                             
      other income, net:
                                                                                                    
      total other income
                                -1,207,500 -1,961,000 -1,284,000 -1,585,000 -1,074,750 -1,400,000 -1,552,000 -1,347,000 -1,118,500 -1,288,000 -1,361,000 -1,825,000   -1,025,000 933,000 -355,000 -2,457,000 -129,000 6,000 -294,000 177,000 -292,000 -548,000 -686,000 357,000 249,000 270,000 85,000 -774,000 209,000 -39,000 -1,197,000 -1,720,000 3,919,000 2,756,000 -534,000 -187,000 -460,000 1,229,000 1,735,000 2,640,000 2,185,000 3,066,000 2,850,000 2,270,000 1,621,000 1,090,000 1,757,000 1,668,000 518,000 697,000 1,557,000 1,303,000 900,000 -661,000 101,000 103,000 247,000 392,000         
      impairment of intangible assets
                                         5,051,000                                                           
      income from continuing operations before income taxes
                                                26,672,000 16,974,000 20,151,000 14,008,000 23,606,000 9,838,000 14,094,000 14,167,000 24,622,000 14,354,000                                           
      income from continuing operations
                                                14,464,000 11,095,000 12,799,000 11,100,000 14,618,000 7,204,000 8,142,000 9,123,000 17,747,000 7,976,000                                           
      income from discontinued operations
                                                    418,000 17,639,000 -4,232,000 21,995,000                                             
      earnings per share:
                                                                                                    
      basic:
                                                                                                    
      continuing operations
                                                0.28 0.22 0.25 0.22 0.28 0.13 0.15 0.16 0.28 0.13                                           
      discontinued operations
                                                    0.01 0.33 -0.08 0.38 0.29 -0.03                                           
      net income per share
                                                0.28 0.22 0.25 0.22 0.29 0.46 0.07 0.54 0.57 0.09                                           
      diluted:
                                                                                                    
      loss from discontinued operations
                                                        -859,500 -2,138,000                                           
      income before income tax
                                                          -3,523,000                                          
      income tax provision
                                                          -1,615,000                                          
      income before provision for income taxes
                                                           12,164,000 19,271,000 12,738,000 27,419,000 28,277,000 31,638,000 14,749,000 26,664,000 -1,623,000 25,246,000 8,905,000 11,082,000 5,948,000 10,259,000 20,747,000 22,789,000 20,214,000 18,621,000 20,073,000 12,910,000 13,443,000 11,236,000 13,855,000 11,525,000 8,562,000 20,790,000 14,158,000 18,219,000 13,697,000 15,964,000 12,801,000 11,717,000 6,725,000 12,596,000 10,470,000 9,557,000 6,054,000 9,826,000 7,837,000 8,231,000 3,516,000 
      amortization of acquired intangibles for purchased technology
                                                            2,967,750 3,966,000 3,930,000  4,887,000 4,839,000 5,285,000  4,850,000 4,811,000 5,069,000 4,728,000 4,584,000 2,958,000 2,817,000 2,673,000 2,612,000 2,496,000 2,493,000 2,491,000 2,378,000 2,255,000 1,993,000 1,524,000                 
      amortization of other acquired intangibles
                                                            1,548,250 1,937,000 1,982,000 2,274,000 2,616,000 2,733,000 2,736,000 2,364,000 1,898,000 2,310,000 2,474,000 2,366,000 2,334,000 1,369,000 1,349,000 1,374,000 1,557,000 1,820,000 1,946,000 1,980,000 2,030,000 1,961,000 1,984,000 1,383,000                 
      amortization of acquired technology intangibles
                                                               3,975,000    5,098,000                                 
      foreign currency gains
                                                                    -402,500 -747,000                               
      compensation expense from repurchase of subsidiary stock options
                                                                                     2,803,000               
      costs and expenses:
                                                                                                    
      total costs and expenses
                                                                                    63,221,750 86,633,000 82,890,000 83,364,000 80,331,000 76,618,000 79,307,000 80,042,000         
      foreign currency losses
                                                                                    -532,000 -317,000 -260,000 -1,551,000 -321,250 -503,000 -403,000 -379,000 -241,500 -404,000 -443,000 -119,000 -452,250 -632,000 -346,000  
      in-process research and development
                                                                                           2,600,000    200,000     
      investment impairment charge
                                                                                                  -1,000,000  
      interest income
                                                                                                1,327,000 1,131,000 1,121,000 1,093,000 
      other
                                                                                                10,250 16,000 38,000  
      other expense
                                                                                                   -13,000 
      basic earnings per share
                                                                                                   0.07 
      weighted-average shares outstanding
                                                                                                35,419   35,717 
      diluted earnings per share
                                                                                                   0.06 
    Balance Sheets:
    Quarterly
    Annual
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        assets
                                                                                                       
        current assets:
                                                                                                       
        cash and cash equivalents
      94,807,000 99,008,000 102,006,000 124,161,000 118,077,000 232,713,000 190,420,000 133,222,000 126,958,000 137,999,000 125,531,000 107,981,000 256,277,000 224,115,000 224,863,000 171,666,000 155,406,000 379,895,000 357,360,000 107,698,000 97,990,000 220,575,000 193,222,000 161,094,000 154,259,000 124,020,000 103,249,000 106,516,000 105,126,000 98,697,000 97,121,000 117,111,000 133,464,000 144,757,000 197,886,000 226,907,000 207,036,000 188,084,000 179,733,000 203,704,000 212,379,000 189,113,000 166,020,000 187,035,000 263,082,000 242,380,000 201,971,000 219,356,000 198,818,000 215,342,000 218,387,000 279,217,000 301,792,000 294,398,000 241,884,000 231,695,000                                          
        accounts receivable
      195,783,000 151,431,000 140,122,000 126,366,000 163,575,000 87,680,000 82,354,000 88,811,000 125,825,000 99,726,000 87,183,000 93,347,000 97,834,000 82,258,000 64,733,000 86,601,000 99,815,000 77,031,000 64,045,000 77,573,000 84,040,000 60,463,000 54,527,000 62,184,000 72,820,000 63,617,000 52,040,000 54,572,000 58,450,000 45,817,000 42,577,000 53,843,000 61,210,000 51,860,000 43,894,000 48,905,000 65,678,000 55,758,000 48,294,000 58,829,000 66,459,000 60,335,000 56,440,000 59,647,000 68,311,000 57,840,000 58,023,000 58,960,000 66,784,000 53,620,000 50,772,000 64,026,000 70,793,000 75,849,000 85,787,000 102,645,000 110,927,000 83,887,000 91,738,000 104,381,000 119,273,000 84,966,000 86,842,000 96,000,000 98,872,000 83,819,000 88,880,000 96,911,000 94,795,000 90,160,000 88,041,000 92,453,000 93,998,000 76,127,000 84,415,000 91,663,000 82,762,000 67,248,000 71,613,000 77,592,000  66,592,000 52,128,000 55,617,000 70,857,000 63,503,000 50,307,000 56,002,000 66,112,000         
        unbilled receivables, current portion
      46,599,000 35,930,000 34,136,000                                                                                               
        other current assets
      62,776,000 49,176,000 49,387,000 54,694,000 52,489,000 33,001,000 37,052,000 46,048,000 48,040,000 33,447,000 35,410,000 42,833,000 42,784,000 29,465,000 32,488,000 40,401,000 39,549,000 19,710,000 21,106,000 23,266,000 23,983,000 15,657,000 20,686,000 24,591,000 27,280,000 19,904,000 18,553,000 19,757,000 25,080,000 13,696,000 13,844,000 16,312,000 18,588,000 18,451,000 22,332,000 23,841,000 20,621,000 20,521,000 21,970,000 20,575,000 15,671,000 19,937,000 19,454,000 16,551,000 24,028,000 21,505,000 25,116,000 29,845,000 30,716,000 27,252,000 26,782,000 26,788,000 16,478,000 26,863,000 26,060,000 22,845,000 21,143,000 22,835,000 23,384,000 27,454,000 27,910,000 25,266,000 30,392,000 28,220,000 20,193,000 20,412,000 26,090,000 20,824,000 18,664,000 20,529,000 24,384,000 22,346,000 17,891,000 17,583,000 20,107,000 16,351,000 17,943,000 17,930,000 17,023,000 17,862,000  11,813,000 34,494,000 24,392,000 24,548,000 11,909,000 22,900,000 26,121,000 25,539,000         
        total current assets
      399,965,000 335,545,000 325,651,000 340,675,000 368,813,000 388,557,000 342,983,000 297,256,000 330,788,000 302,840,000 281,082,000 292,701,000 426,053,000 364,434,000 355,869,000 342,622,000 337,808,000 508,897,000 470,968,000 239,309,000 238,935,000 320,206,000 291,398,000 274,738,000 284,665,000 236,294,000 204,306,000 215,684,000 228,819,000 197,394,000 200,621,000 237,652,000 263,407,000 261,627,000 311,308,000 336,938,000 336,053,000 308,963,000 299,373,000 330,895,000 323,409,000 330,367,000 312,579,000 312,298,000 385,673,000 352,682,000 321,107,000 347,691,000 337,811,000 335,637,000 357,848,000 432,841,000 526,818,000 471,755,000 450,951,000 451,716,000 407,777,000 468,422,000 518,757,000 517,153,000 483,858,000 394,377,000 392,022,000 349,772,000 357,619,000 308,770,000 280,122,000 256,478,000 246,252,000 354,475,000 383,575,000 351,099,000 464,423,000 417,118,000 395,079,000 361,114,000 360,139,000 342,566,000 333,928,000 325,530,000  366,327,000 339,404,000 299,961,000 300,079,000 278,255,000 258,597,000 257,738,000 240,438,000         
        unbilled receivables, non-current portion
      29,950,000 30,760,000 29,890,000                                                                                               
        property and equipment
      13,694,000 13,134,000 12,474,000 13,233,000 13,746,000 12,574,000 13,117,000 14,081,000 15,225,000 16,166,000 14,655,000 14,981,000 14,927,000 13,409,000 13,649,000 13,933,000 14,345,000 28,724,000 29,333,000 29,838,000 29,817,000 28,111,000 27,693,000 29,150,000 29,765,000 31,573,000 32,971,000 29,351,000 30,714,000 42,689,000 42,208,000 41,761,000 42,261,000 43,283,000 44,863,000 48,258,000 50,105,000 50,778,000 51,760,000 53,492,000 54,226,000 56,825,000 57,653,000 61,994,000 59,351,000 59,176,000 59,865,000 60,871,000 57,030,000 56,889,000 59,352,000 61,528,000 63,071,000 64,479,000 66,444,000 68,048,000 66,206,000 66,344,000 63,023,000 59,620,000 58,207,000 57,963,000 57,289,000 57,783,000 59,625,000 61,166,000 61,859,000 62,477,000 63,147,000 63,045,000 63,916,000 65,131,000 64,949,000 62,869,000 60,239,000 61,215,000 57,585,000 49,620,000 48,719,000 46,489,000  42,816,000 40,128,000 40,411,000 40,567,000 40,658,000 35,299,000 35,668,000 36,123,000 35,572,000 34,570,000 34,558,000 35,312,000 34,045,000 35,145,000 36,200,000 35,479,000 
        intangible assets
      584,028,000 619,363,000 650,557,000 686,359,000 723,571,000 284,706,000 304,644,000 328,009,000 354,278,000 378,824,000 404,515,000 440,942,000 217,355,000 233,436,000 252,360,000 271,290,000 287,185,000 179,190,000 190,768,000 202,347,000 212,747,000 81,934,000 87,774,000 93,615,000 99,392,000 136,381,000 150,907,000 50,297,000 58,919,000 67,712,000 76,540,000 85,757,000 94,894,000 101,777,000 86,864,000 73,970,000 80,827,000 87,684,000 99,864,000 106,988,000 114,113,000 121,323,000 128,605,000 135,851,000 20,578,000 15,139,000 16,090,000 9,257,000 9,950,000 10,690,000 11,430,000 4,574,000 5,119,000 47,676,000 53,437,000 58,882,000 64,408,000    83,208,000    86,389,000    108,869,000    59,931,000    75,069,000     47,213,000    40,233,000    7,217,000 7,800,000 8,409,000 8,973,000 887,000    
        goodwill
      1,309,054,000 1,309,252,000 1,293,830,000 1,293,822,000 1,292,177,000 832,748,000 832,783,000 832,806,000 832,101,000 826,048,000 825,944,000 811,859,000 671,037,000 672,901,000 673,066,000 673,036,000 671,152,000 491,412,000 491,731,000 491,701,000 491,726,000 431,864,000 431,869,000 432,789,000 432,824,000 432,598,000 432,623,000 315,010,000 314,992,000 314,951,000 315,012,000 315,106,000 315,041,000 315,913,000 290,698,000 278,132,000 278,067,000 370,097,000 370,025,000 369,964,000 369,985,000 370,465,000 370,533,000 370,625,000 232,836,000 230,677,000 230,681,000 224,185,000 224,286,000 224,290,000 224,440,000 226,104,000 226,110,000 252,735,000 257,625,000 263,283,000 263,239,000 238,588,000 238,591,000 238,514,000 238,343,000 239,471,000 237,415,000 235,835,000 218,498,000 219,854,000 219,770,000 227,354,000 233,385,000 155,333,000 153,289,000 153,273,000 149,057,000 157,824,000 157,632,000 157,343,000 157,858,000 153,547,000 152,028,000 153,419,000  84,974,000 84,708,000 88,497,000 67,249,000 67,130,000 60,243,000 61,476,000 60,861,000 14,313,000 14,676,000 17,011,000 16,755,000 4,013,000    
        right-of-use lease assets
      25,842,000 27,727,000 27,351,000 28,308,000 30,894,000 12,853,000 14,219,000 15,318,000 18,711,000 20,596,000 23,396,000 21,768,000 17,574,000 18,950,000 21,364,000 23,604,000 25,253,000 28,286,000 30,833,000 31,265,000 30,635,000                                                                             
        deferred tax assets
      77,442,000 68,823,000 62,048,000 57,452,000 56,179,000 41,078,000 32,628,000 19,271,000 15,052,000 11,745,000 4,374,000 1,400,000 11,765,000 5,735,000 4,180,000 3,795,000 1,415,000 10,872,000 10,129,000 13,613,000 14,490,000 19,327,000 17,995,000 17,334,000 18,601,000 10,159,000 1,877,000 889,000 1,922,000 876,000 846,000 948,000 1,123,000 1,221,000 1,098,000 1,508,000 6,601,000 11,626,000 9,537,000 11,635,000 10,971,000 31,791,000 37,564,000 24,936,000 10,066,000 12,045,000 11,392,000 10,837,000 8,871,000 12,783,000 13,254,000 20,652,000 16,301,000 10,105,000 10,856,000 11,062,000 14,291,000    14,279,000    14,433,000                                 
        other assets
      17,683,000 17,107,000 11,791,000 12,153,000 12,693,000 12,732,000 13,600,000 7,387,000 8,255,000 8,128,000 9,192,000 12,034,000 12,832,000 11,455,000 9,841,000 8,603,000 8,915,000 5,881,000 5,490,000 4,650,000 6,299,000 5,275,000 3,998,000 3,857,000 3,532,000 2,933,000 2,733,000 2,079,000 5,243,000 1,810,000 1,746,000 1,916,000 1,992,000 1,995,000 2,233,000 2,325,000 3,174,000 3,631,000 3,671,000 3,894,000 4,419,000 4,652,000 4,672,000 4,449,000 2,364,000 2,798,000 3,163,000 3,552,000 7,963,000 8,314,000 4,747,000 5,319,000 10,973,000 5,588,000 5,829,000 5,999,000 5,627,000    4,350,000    5,367,000 5,641,000 5,194,000 4,758,000 5,885,000 14,585,000 12,298,000 5,880,000 5,851,000 5,481,000 5,056,000 4,770,000 5,435,000 4,785,000 4,803,000 4,986,000  5,066,000 23,350,000 19,725,000 19,992,000 3,362,000 16,886,000 17,289,000 17,205,000 2,284,000 16,680,000 15,566,000 15,795,000 6,393,000 10,919,000 11,473,000 12,360,000 
        total assets
      2,457,658,000 2,421,711,000 2,413,592,000 2,462,418,000 2,526,966,000 1,619,884,000 1,586,375,000 1,547,769,000 1,602,783,000 1,597,468,000 1,601,885,000 1,643,607,000 1,411,479,000 1,346,292,000 1,354,582,000 1,353,116,000 1,363,537,000 1,275,487,000 1,239,994,000 1,027,057,000 1,041,782,000 919,468,000 895,602,000 890,182,000 881,271,000 859,925,000 829,905,000 615,891,000 640,609,000 625,432,000 636,973,000 683,140,000 718,718,000 725,816,000 737,064,000 741,131,000 754,827,000 832,779,000 834,230,000 876,868,000 877,123,000 886,634,000 877,018,000 889,592,000 703,061,000 676,644,000 673,349,000 690,434,000 682,187,000 686,590,000 711,093,000 780,374,000 884,977,000 906,326,000 899,311,000 908,880,000 865,310,000  960,229,000                                       
        liabilities and stockholders' equity
                                                                                                       
        current liabilities:
                                                                                                       
        accounts payable
      15,934,000 12,847,000 9,043,000 14,770,000 13,910,000 10,781,000 8,583,000 9,921,000 12,371,000 8,729,000 7,162,000 10,464,000 9,282,000 7,717,000 9,917,000 8,041,000 9,683,000 6,667,000 11,358,000 10,105,000 9,978,000 6,372,000 8,815,000 10,215,000 10,603,000 6,882,000 9,541,000 9,823,000 10,593,000 8,299,000 10,406,000 8,913,000 9,000,000 6,657,000 8,748,000 9,491,000 12,991,000 9,647,000 9,630,000 11,917,000 11,188,000 9,363,000 10,191,000 10,241,000 11,749,000 7,076,000 8,906,000 8,480,000 9,560,000 5,797,000 6,594,000 8,879,000 10,477,000 4,827,000 8,948,000 6,268,000 7,039,000 6,219,000 7,586,000 7,437,000 13,176,000 6,337,000 11,437,000 10,976,000 12,400,000 9,100,000 10,184,000 6,494,000 11,592,000 10,408,000 12,524,000 11,769,000 12,684,000 9,396,000 12,332,000 13,994,000 15,034,000 10,702,000 12,656,000 12,815,000  11,654,000 8,491,000 10,076,000 11,755,000 11,953,000 9,161,000 10,454,000 11,314,000         
        accrued compensation and related payroll taxes
      71,804,000 63,323,000 41,727,000 43,154,000 64,672,000                                                                                             
        convertible senior notes, current portion
      359,163,000 358,619,000 358,051,000                                                                                               
        operating lease liabilities, current portion
      8,490,000 8,788,000 8,250,000                                                                                               
        other accrued current liabilities
      29,593,000                                                                                                 
        deferred revenue, current portion
      324,750,000 298,716,000 308,360,000                                                                                               
        total current liabilities
      809,734,000 769,809,000 750,271,000 428,541,000 455,145,000 314,908,000 307,221,000 312,208,000 352,118,000 324,703,000 323,494,000 337,157,000 318,004,000 279,683,000 284,229,000 283,730,000 322,929,000 271,608,000 266,077,000 265,740,000 262,543,000 227,691,000 225,172,000 230,722,000 240,885,000 215,332,000 204,199,000 182,028,000 196,018,000 188,217,000 194,863,000 203,032,000 208,018,000 206,105,000 210,242,000 221,169,000 203,738,000 195,987,000 195,424,000 203,407,000 199,916,000 197,391,000 196,391,000 193,815,000 153,303,000 148,176,000 150,159,000 162,134,000 164,579,000 163,770,000 165,387,000 181,136,000 240,154,000 217,466,000 230,409,000 246,085,000 231,508,000 228,438,000 231,096,000 239,042,000 237,676,000 213,505,000 219,323,000 247,428,000 226,924,000 220,255,000 228,935,000 233,830,000 241,385,000 213,892,000 223,651,000 224,344,000 228,470,000 209,482,000 212,834,000 210,731,000 214,169,000 196,495,000 201,553,000 213,337,000  174,593,000 170,490,000 171,375,000 178,165,000 171,775,000 157,583,000 165,968,000 163,010,000         
        long-term debt
      600,000,000 620,000,000 660,000,000 700,000,000 730,000,000   335,943,000 356,111,000 389,388,000 422,666,000 450,943,000 259,220,000 260,779,000 262,337,000 263,896,000 239,992,000 247,375,000 254,757,000 343,758,000 364,260,000 271,261,000 276,762,000 280,382,000 284,002,000 287,622,000 291,194,000 108,042,000 110,270,000 111,725,000 113,180,000 114,635,000 116,090,000 108,303,000 111,964,000 115,625,000 120,000,000 123,750,000 127,500,000 131,250,000 135,000,000 136,875,000 138,750,000 140,625,000                                     1,938,000                 
        convertible senior notes, non-current portion
      441,186,000 440,713,000 440,244,000                                                                                               
        operating lease liabilities, non-current portion
      21,077,000 22,705,000 22,548,000                                                                                               
        deferred revenue, non-current portion
      100,329,000 82,346,000 80,219,000                                                                                               
        deferred tax liabilities
      1,158,000 2,599,000 2,481,000 2,286,000 2,279,000 3,765,000 3,710,000 3,628,000 3,574,000 4,240,000 4,547,000 5,546,000 4,628,000 5,712,000 6,098,000 5,931,000 14,163,000       3,000 3,000 89,000 70,000 2,665,000 3,797,000 1,323,000 1,228,000 2,163,000 2,809,000 5,793,000 7,798,000 3,022,000 3,901,000 6,149,000 6,918,000 7,348,000 7,112,000 9,643,000 9,703,000 9,869,000 305,000 353,000 355,000 338,000 340,000 477,000 515,000 535,000 1,032,000 1,499,000 1,508,000 1,581,000 1,533,000    2,378,000    3,445,000                                 
        other non-current liabilities
      5,825,000 5,857,000 5,128,000                                                       3,787,000 4,435,000 4,752,000  6,696,000 6,252,000 8,808,000  8,389,000 9,332,000 9,083,000  3,773,000 5,129,000 4,893,000  3,780,000 3,714,000 3,778,000                      
        stockholders' equity:
                                                                                                       
        preferred stock, 0.01 par value...
                                                                                                       
        common stock, 0.01 par value...
      423,000 429,000 431,000 430,000 434,000 429,000 431,000 437,000 438,000 438,000 436,000 433,000 433,000 430,000 435,000 438,000 441,000 343,677,000 334,064,000 312,137,000 442,000 311,342,000 304,282,000 296,699,000 450,000 289,488,000 282,193,000 272,854,000 451,000 263,255,000 258,696,000 255,047,000  246,628,000 242,331,000 239,759,000  237,136,000 231,043,000 232,233,000  223,299,000 212,157,000 215,140,000  200,681,000 200,003,000 208,771,000  214,915,000 232,838,000 264,810,000  352,773,000 342,087,000 329,405,000                                          
        additional paid-in capital
      383,696,000 371,623,000 362,091,000 353,039,000 354,158,000 338,594,000 330,382,000 372,273,000 370,579,000 361,062,000 347,101,000 338,370,000 331,650,000 318,559,000 309,913,000 303,240,000 354,235,000    305,802,000    295,503,000    266,602,000    249,363,000    239,011,000    227,424,000    209,271,000    204,792,000    299,737,000                                             
        retained earnings
      127,373,000 138,051,000 123,254,000 115,999,000 120,405,000 119,241,000 105,590,000 123,429,000 120,858,000 115,133,000 103,995,000 108,286,000 101,656,000 86,513,000 93,885,000 93,661,000 90,256,000 83,455,000 60,301,000 71,118,000 72,547,000 90,425,000 73,923,000 64,475,000 64,303,000 76,486,000 61,744,000 60,462,000 71,242,000 68,329,000 74,655,000 107,800,000 145,247,000 162,139,000 173,617,000 173,689,000 195,694,000 281,303,000 282,918,000 316,082,000 319,162,000 328,632,000 332,757,000 342,136,000 347,193,000 332,729,000   320,006,000    348,830,000                                             
        accumulated other comprehensive loss
      -33,143,000 -32,421,000 -33,075,000 -37,621,000 -36,209,000 -32,652,000 -34,736,000 -34,396,000 -32,160,000 -31,587,000 -32,717,000 -33,646,000 -35,235,000 -38,529,000 -32,087,000 -29,016,000 -32,443,000 -30,359,000 -28,644,000 -30,702,000 -32,778,000 -33,601,000 -38,244,000 -33,217,000 -29,974,000 -33,022,000 -28,590,000 -26,614,000 -28,213,000 -26,112,000 -24,214,000 -15,195,000 -18,999,000 -17,165,000 -23,112,000 -27,262,000 -28,561,000 -23,860,000 -22,558,000 -25,679,000 -24,628,000 -22,189,000 -21,915,000 -19,206,000 -13,726,000 -9,133,000   -11,659,000    -10,764,000                                             
        total stockholders' equity
      478,349,000                                                                                                 
        total liabilities and stockholders' equity
      2,457,658,000                                                                                                 
        liabilities and stockholders’ equity
                                                                                                       
        other accrued liabilities
       27,516,000 24,840,000 32,844,000 35,219,000 24,876,000 19,444,000 18,044,000 22,499,000 24,935,000 26,514,000 23,254,000 16,765,000 16,878,000 15,469,000 18,658,000 19,491,000 15,712,000 11,209,000 14,930,000 14,302,000 11,371,000 10,179,000 13,108,000 18,685,000 20,434,000 20,605,000 11,887,000 12,686,000 15,498,000 16,026,000 18,797,000 20,496,000 19,354,000 24,751,000 32,890,000 12,999,000 17,796,000 17,528,000 22,529,000 21,465,000 21,723,000 24,873,000 29,992,000 25,936,000 24,634,000 23,510,000 27,732,000 29,345,000 37,626,000 29,480,000 35,433,000 39,876,000 37,630,000 41,126,000 39,230,000 35,728,000 37,378,000 36,987,000 39,182,000 36,148,000 34,217,000 31,445,000 43,793,000 24,369,000 28,952,000 30,363,000 42,998,000 43,750,000 26,466,000 26,490,000 27,729,000 26,493,000 23,603,000 22,229,000 21,972,000 23,166,000 22,888,000 21,813,000 28,887,000  22,737,000 23,148,000 21,251,000 19,361,000 20,553,000 17,955,000 17,682,000 19,688,000         
        commitments and contingencies
                                                                                                       
        stockholders’ equity:
                                                                                                       
        total stockholders’ equity
       477,682,000 452,701,000 431,847,000 438,788,000 425,612,000 401,667,000 461,743,000 459,715,000 445,046,000 418,815,000 413,443,000 398,504,000 366,973,000 372,146,000 368,323,000 412,489,000                                                                                 
        total liabilities and stockholders’ equity
       2,421,711,000 2,413,592,000 2,462,418,000 2,526,966,000 1,619,884,000 1,586,375,000 1,547,769,000 1,602,783,000 1,597,468,000 1,601,885,000 1,643,607,000 1,411,479,000 1,346,292,000 1,354,582,000 1,353,116,000 1,363,537,000                                                                                 
        unbilled receivables
         35,454,000 34,672,000 35,163,000 33,157,000 29,175,000 29,965,000 31,668,000 32,958,000 33,596,000               5,160,000 2,121,000                                                                      
        long-term unbilled receivables
         30,416,000 28,893,000 34,636,000 32,401,000 33,641,000 28,373,000 33,121,000 38,727,000 47,922,000               4,488,000 2,581,000                                                                      
        short-term deferred revenue
         328,798,000 332,142,000 218,036,000 226,579,000 232,566,000 236,090,000 219,601,000 227,607,000 244,733,000 227,670,000 197,425,000 207,331,000 209,771,000 205,021,000 169,740,000 175,472,000 183,443,000 166,387,000 151,505,000 153,549,000 161,049,000 157,494,000 143,972,000 135,929,000 130,569,000 133,194,000 131,854,000 135,202,000 144,573,000 132,538,000 131,932,000 133,254,000 136,919,000 128,960,000 129,354,000 133,006,000 136,159,000 125,227,000 124,285,000 127,037,000 123,005,000 92,557,000 93,086,000 98,413,000 106,482,000 96,393,000 96,534,000 102,094,000 115,564,000 103,925,000 129,606,000 146,882,000 162,552,000 145,727,000 144,713,000 149,888,000 158,088,000 138,961,000 134,334,000 136,946,000 157,739,000 141,243,000 138,277,000 149,181,000 151,641,000 135,786,000 137,821,000 148,402,000 152,442,000 135,487,000 129,659,000 133,237,000 136,758,000 120,974,000 117,450,000 125,769,000 124,871,000  99,697,000 100,767,000 107,203,000 117,919,000 101,106,000            
        short-term operating lease liabilities
         8,975,000 9,202,000 8,873,000 9,447,000 9,821,000 10,114,000 10,088,000 10,090,000 9,321,000 7,471,000 7,443,000 7,843,000 8,075,000 7,926,000 7,269,000 7,361,000 7,154,000 7,015,000 6,271,000 6,618,000 6,601,000                                                                          
        long-term deferred revenue
         71,508,000 72,270,000 67,348,000 64,995,000 63,567,000 58,946,000 60,167,000 56,030,000 57,114,000 54,770,000 53,696,000 51,249,000 51,771,000 47,359,000 33,280,000 27,158,000 25,535,000 26,908,000 19,851,000 19,741,000 19,749,000 19,752,000 16,554,000 14,476,000 11,614,000 15,127,000 12,975,000 12,586,000 9,655,000 9,750,000 8,774,000 8,820,000 10,032,000 8,801,000 8,529,000 9,229,000 8,512,000 8,844,000 6,711,000 2,588,000 2,883,000 3,683,000 2,193,000 2,533,000 745,000 1,144,000 1,044,000 1,293,000 1,284,000 2,817,000 5,343,000 5,517,000 5,069,000 6,619,000 5,026,000 5,222,000 4,777,000 2,908,000 3,342,000 3,788,000 3,679,000 4,511,000 5,289,000 5,492,000 6,900,000 7,957,000 9,169,000 10,981,000 10,801,000 11,200,000 9,048,000 8,565,000 9,179,000 6,355,000 5,615,000 5,831,000 6,263,000  5,068,000 5,124,000 7,456,000 6,665,000 5,861,000            
        convertible senior notes
         797,277,000 796,267,000 795,282,000 794,277,000 355,319,000 354,772,000 354,246,000 353,696,000 353,159,000 352,625,000 352,108,000 351,567,000 351,038,000 294,535,000 291,283,000 288,023,000                                                                               
        long-term operating lease liabilities
         24,260,000 26,259,000 8,597,000 9,970,000 11,208,000 13,000,000 15,086,000 17,654,000 17,341,000 15,041,000 16,662,000 18,965,000 21,230,000 23,130,000 24,010,000 26,541,000 27,342,000 26,966,000 19,442,000 19,896,000 21,049,000                                                                          
        other noncurrent liabilities
         6,699,000 5,958,000 4,372,000 4,535,000 4,153,000 4,547,000 4,592,000 4,983,000 8,904,000 8,687,000 10,679,000 7,991,000 7,197,000 8,940,000 11,158,000 11,717,000 12,129,000 15,092,000 13,057,000 14,070,000 10,320,000 6,347,000 7,376,000 4,619,000 4,840,000 5,315,000 5,720,000 5,979,000 6,003,000 5,967,000 5,239,000 5,404,000 5,097,000 11,758,000 3,785,000 3,756,000 3,715,000 3,787,000 6,272,000 6,587,000 4,330,000 2,525,000 1,645,000 1,776,000 2,543,000 2,470,000 1,944,000 1,660,000 1,603,000 2,575,000 2,574,000 2,333,000 2,715,000 3,350,000    5,253,000    7,854,000    10,531,000    115,000                         
        current portion of long-term debt
              13,109,000 11,390,000 9,671,000 7,953,000 6,234,000 6,234,000 6,234,000 6,234,000 25,767,000 23,886,000 22,005,000 20,124,000 18,242,000 16,361,000 14,480,000 12,599,000 10,717,000 8,836,000 7,002,000 6,593,000 5,819,000 5,819,000 5,819,000 5,819,000 5,819,000 14,643,000 14,643,000 14,643,000 15,000,000 13,125,000 11,250,000 9,375,000 9,375,000 7,500,000 7,500,000 7,500,000           71,000 174,000 357,000    388,000    358,000    330,000    305,000                         
        dividends payable to stockholders
           8,423,000 8,351,000 8,435,000 8,376,000 8,354,000 8,192,000 8,141,000 8,115,000 8,099,000 8,094,000 8,062,000 7,925,000                                                                                 
        accrued compensation and related taxes
           43,919,000 34,817,000 33,421,000 49,559,000 41,606,000 34,258,000 33,291,000 42,467,000 35,887,000 29,341,000 24,889,000 47,116,000 34,871,000 29,344,000 21,213,000 36,816,000 24,904,000 21,549,000 17,928,000 34,444,000 24,441,000 20,762,000 14,984,000 25,500,000 17,534,000 17,605,000 17,406,000 32,373,000 25,269,000 21,158,000 19,813,000 26,212,000 20,967,000 19,951,000 20,339,000 29,720,000 26,250,000 22,816,000 20,168,000 20,815,000 18,539,000 16,135,000 16,016,000 26,697,000 23,813,000 23,053,000 20,193,000 39,105,000 35,967,000 31,472,000 29,878,000 31,245,000 28,143,000 29,759,000 26,723,000 44,920,000 36,699,000 37,881,000 32,903,000 44,472,000 36,248,000 37,094,000 29,345,000 46,001,000 37,928,000 35,502,000 30,246,000 50,092,000 40,350,000 37,277,000 29,561,000 48,398,000 35,226,000 35,346,000 26,377,000  39,259,000 35,923,000 31,096,000 25,026,000 34,907,000 29,230,000 27,283,000 23,056,000         
        short-term investments
                 14,944,000  749,000 1,050,000 1,656,000 1,967,000 3,782,000 5,300,000 6,673,000 8,005,000 9,544,000 10,423,000 15,961,000 19,426,000 21,377,000 25,304,000 26,942,000 34,387,000 39,184,000 47,079,000 50,386,000 50,145,000 46,559,000 47,196,000 37,285,000 42,718,000 44,600,000 49,376,000 47,787,000 28,900,000 29,191,000 33,101,000 24,129,000 20,186,000 18,912,000 24,605,000 28,693,000 32,622,000 26,640,000 37,417,000 42,158,000 53,425,000 57,809,000 86,364,000 83,469,000 100,321,000 88,774,000 78,536,000 58,691,000 35,837,000 14,164,000 32,840,000 31,403,000 48,248,000 74,398,000 14,832,000 8,899,000 22,044,000 19,194,000 42,413,000 57,142,000 285,646,000 256,485,000 222,370,000 177,375,000 194,866,000 187,560,000 178,055,000 136,523,000  209,021,000 194,004,000 151,515,000 139,732,000 49,818,000 43,895,000 58,710,000 57,159,000         
        total cash, cash equivalents and short-term investments
                 122,925,000 256,277,000 224,864,000 225,913,000 173,322,000 157,373,000 383,677,000 362,660,000 114,371,000 105,995,000 230,119,000 203,645,000 177,055,000 173,685,000 145,397,000 128,553,000 133,458,000 139,513,000 137,881,000 144,200,000 167,497,000 183,609,000 191,316,000 245,082,000 264,192,000 249,754,000 232,684,000 229,109,000 251,491,000 241,279,000 218,304,000 199,121,000 211,164,000 283,268,000 261,292,000 226,576,000 248,049,000 231,440,000 241,982,000 255,804,000 321,375,000 355,217,000 352,207,000 328,248,000 315,164,000                                          
        unbilled receivables and contract assets
                  29,158,000 27,847,000 32,735,000 27,043,000 25,816,000 28,479,000 23,157,000 24,099,000 24,917,000 13,967,000 12,540,000 10,908,000 10,880,000 7,376,000                                                                        
        assets held for sale
                     15,255,000 15,255,000           5,776,000 5,776,000                      11,236,000  68,029,000 6,731,000                                            
        long-term unbilled receivables and contract assets
                  39,936,000 25,972,000 24,253,000 16,233,000 17,464,000 22,225,000 10,742,000 14,334,000 17,133,000 8,740,000 10,194,000 12,792,000 12,492,000 9,987,000                                                                        
        liabilities and shareholders’ equity
                                                                                                       
        dividends payable to shareholders
                       7,988,000 7,921,000 7,901,000 7,904,000 7,568,000 7,539,000 7,465,000 7,498,000 7,003,000 6,944,000 6,939,000 6,998,000 6,324,000 6,377,000 6,482,000 6,619,000 5,975,000 6,035,000 6,037,000 6,067,000                                                             
        income taxes payable
                       5,475,000 1,407,000 870,000 1,899,000 3,339,000 2,443,000 1,757,000 1,444,000 3,764,000 3,416,000 1,233,000 1,228,000 2,889,000 3,428,000 1,042,000 1,173,000 2,275,000 1,653,000 1,376,000 1,509,000 5,098,000 4,059,000 3,088,000 2,941,000 8,270,000 3,974,000 2,909,000 2,246,000 4,841,000 3,195,000 3,424,000 2,584,000  154,000 1,067,000 21,486,000 4,171,000 1,910,000 7,983,000 11,412,000 11,609,000 6,472,000 7,216,000 4,083,000 1,538,000 1,242,000 1,652,000 4,082,000 7,327,000 1,769,000 3,015,000 3,926,000 945,000 416,000 1,847,000 3,409,000 6,175,000 7,467,000 8,159,000 6,316,000 9,953,000 5,701,000 1,993,000  984,000 1,906,000 1,500,000 3,861,000 3,018,000 1,762,000 3,602,000 2,980,000         
        shareholders’ equity:
                                                                                                       
        total shareholders’ equity
                       396,773,000 365,721,000 352,553,000 346,013,000 368,166,000 339,961,000 327,957,000 330,282,000 332,952,000 315,347,000 306,702,000 310,082,000 305,472,000 309,137,000 347,652,000 376,084,000 391,602,000 392,836,000 386,186,000 406,629,000 494,579,000 491,403,000 522,636,000 522,464,000 529,742,000 522,999,000 538,070,000 543,245,000 524,277,000 518,526,000 524,674,000 513,654,000 519,355,000 542,238,000 595,816,000 638,399,000 679,444,000 659,544,000 653,430,000 622,300,000 671,028,000 716,923,000 714,648,000 688,332,000 633,138,000 629,048,000 567,054,000 555,452,000 524,625,000 507,966,000 487,250,000 481,452,000 481,748,000 509,544,000 502,041,000 517,874,000 496,834,000 471,124,000 444,012,000 444,564,000 431,416,000 413,935,000 395,930,000  381,659,000 356,072,000 316,170,000 279,168,000 266,978,000 251,318,000 245,881,000 233,839,000         
        total liabilities and shareholders’ equity
                       1,275,487,000 1,239,994,000 1,027,057,000 1,041,782,000 919,468,000 895,602,000 890,182,000 881,271,000 859,925,000 829,905,000 615,891,000 640,609,000 625,432,000 636,973,000 683,140,000 718,718,000 725,816,000 737,064,000 741,131,000 754,827,000 832,779,000 834,230,000 876,868,000 877,123,000 886,634,000 877,018,000 889,592,000 703,061,000 676,644,000 673,349,000 690,434,000 682,187,000 686,590,000 711,093,000 780,374,000 884,977,000 906,326,000 899,311,000 908,880,000 865,310,000                                         
        operating lease right-of-use assets
                           24,011,000 24,681,000 25,907,000                                                                          
        the company adopted the accounting standard related to revenue recognition ("asc 606") effective december 1, 2018 using the full retrospective method. see note 1. nature of business and summary of significant accounting policies for further information.
                                                                                                       
        the company adopted the accounting standard related to revenue recognition ("asc 606") effective december 1, 2018 using the full retrospective method. see note 1. nature of business and basis of presentation for further information.
                                                                                                       
        preferred stock, .01 par value...
                                                                                                       
        common stock, .01 par value...
                                      473,000    485,000    506,000    507,000    515,000    596,000    309,221,000    347,604,000    247,265,000    216,261,000    240,647,000    197,748,000     146,589,000    70,085,000            
        investments in auction rate securities
                                                    25,056,000 25,110,000 24,761,000 26,573,000 26,500,000 26,442,000 26,321,000 31,285,000 31,448,000 33,343,000 33,539,000    39,643,000    40,714,000 40,459,000 56,165,000 56,694,000 62,364,000                             
        retained earnings, including accumulated other comprehensive loss of 10,414 in 2014 and 11,659 in 2013
                                                    318,523,000                                                   
        retained earnings, including accumulated other comprehensive loss of 11,285 in 2014 and 11,659 in 2013
                                                     315,903,000                                                  
        liabilities held for sale
                                                        4,012,000  25,285,000 5,265,000                                            
        retained earnings, including accumulated other comprehensive loss of 14,676 in 2013 and 10,764 in 2012
                                                       304,440,000                                                
        retained earnings, including accumulated other comprehensive loss of 13,139 in 2013 and 10,764 in 2012
                                                        309,400,000                                               
        retained earnings, including accumulated other comprehensive loss of 11,127 in 2013 and 10,764 in 2012
                                                         331,006,000                                              
        retained earnings, including accumulated other comprehensive loss of 12,292 in 2012 and 11,653 in 2011
                                                           326,671,000                                            
        retained earnings, including accumulated other comprehensive loss of 14,260 in 2012 and 13,056 in 2011
                                                            317,457,000                                           
        retained earnings, including accumulated other comprehensive loss of 9,600 in 2012 and 13,056 in 2011
                                                             324,025,000                                          
        cash and equivalents
                                                              161,095,000 257,769,000 310,442,000 312,148,000 286,559,000 255,049,000 227,728,000 179,164,000 175,873,000 112,119,000 133,903,000 114,950,000 96,485,000 212,269,000 216,613,000 166,941,000 53,879,000 50,486,000 48,407,000 56,445,000 46,449,000 49,556,000 48,609,000 70,586,000  57,399,000 58,778,000 68,437,000 64,942,000 141,449,000 141,495,000 116,905,000 91,628,000         
        total cash and short-term investments
                                                              261,416,000 346,543,000 388,978,000 370,839,000 322,396,000 269,213,000 260,568,000 210,567,000 224,121,000 186,517,000 148,735,000 123,849,000 118,529,000 231,463,000 259,026,000 224,083,000 339,525,000 306,971,000 270,777,000 233,820,000 241,315,000 237,116,000 226,664,000 207,109,000  266,420,000 252,782,000 219,952,000 204,674,000             
        long-term debt, less current portion
                                                                73,000 182,000 276,000 377,000 477,000 604,000 664,000 757,000 849,000 935,000 1,022,000 1,107,000 1,190,000 1,277,000 1,352,000 1,431,000 1,508,000 1,583,000 1,657,000 1,730,000 1,802,000 1,870,000  1,938,000 2,005,000 2,071,000 2,137,000 2,200,000            
        retained earnings, including accumulated other comprehensive loss of 13,056 in 2011 and 9,138 in 2010
                                                              313,079,000                                         
        deferred income taxes
                                                               15,157,000 14,657,000 14,479,000  14,932,000 14,220,000 14,985,000  18,022,000 16,417,000 14,894,000 14,264,000 12,323,000 12,124,000 12,217,000 13,009,000 16,437,000 19,780,000 19,280,000 18,119,000 20,272,000 18,628,000 22,967,000  21,502,000    11,576,000    14,654,000        
        acquired intangible assets
                                                               65,343,000 71,254,000 77,053,000  90,646,000 97,896,000 108,324,000  92,844,000 99,878,000 101,033,000  54,346,000 55,159,000 59,218,000  63,821,000 66,230,000 70,578,000  75,265,000 73,829,000 76,182,000   50,290,000 52,698,000 38,248,000  37,876,000 39,678,000 42,222,000         
        long-term investments and other assets
                                                               40,082,000                                        
        total
                                                               910,760,000  965,832,000 936,823,000 860,320,000 862,046,000 830,848,000 798,850,000 764,050,000 758,173,000 742,209,000 752,370,000 713,924,000 755,002,000 747,442,000 761,828,000 720,575,000 697,745,000 669,283,000 670,239,000 639,202,000 626,998,000 621,039,000 34,067,000 566,838,000 537,880,000 501,292,000 466,135,000 446,814,000 408,901,000 411,849,000 396,849,000         
        current portion, long-term debt
                                                               376,000 404,000 396,000  380,000 372,000 365,000  351,000 344,000 337,000  324,000 317,000 311,000  299,000 292,000 287,000 281,000 276,000 268,000 265,000  262,000 255,000 249,000 243,000 238,000            
        common shares, ...
                                                               340,118,000 366,204,000 362,439,000  314,563,000 316,629,000 268,073,000  235,285,000 225,958,000 219,575,000  207,206,000 230,466,000 229,416,000  225,878,000 213,631,000 196,279,000  192,537,000 184,429,000 154,721,000    99,996,000 74,316,000  64,979,000 66,412,000 60,616,000         
        retained earnings, including accumulated other comprehensive losses of (3,110) in 2011 and (9,138) in 2010
                                                               330,910,000                                        
        long-term investments and other
                                                                39,905,000 44,048,000  44,343,000 44,696,000 44,858,000                                  
        retained earnings, including accumulated other comprehensive losses of (3,143) in 2011 and (9,138) in 2010
                                                                350,719,000                                       
        total liabilities and shareholder’s equity
                                                                960,229,000                                       
        retained earnings, including accumulated other comprehensive losses of (4,771) in 2011 and (9,138) in 2010
                                                                 352,209,000                                      
        retained earnings, including accumulated other comprehensive loss of (9,138) in 2010 and (3,385) in 2009
                                                                  340,728,000                                     
        retained earnings, including accumulated other comprehensive losses of (10,020) in 2010 and (3,385) in 2009
                                                                   318,575,000                                    
        retained earnings, including accumulated other comprehensive losses of (13,105) in 2010 and (3,385) in 2009
                                                                    312,419,000                                   
        retained earnings, including accumulated other comprehensive losses of (8,080) in 2010 and (3,385) in 2009
                                                                     298,981,000                                  
        retained earnings, including accumulated other comprehensive loss of (3,385) in 2009 and (14,033) in 2008
                                                                      308,187,000                                 
        retained earnings, including accumulated other comprehensive losses of (5,566) in 2009 and (14,033) in 2008
                                                                       289,340,000                                
        auction rate securities rights offering
                                                                        2,040,000 1,993,000 2,850,000                             
        commitments and contingencies shareholders’ equity:
                                                                                                       
        retained earnings, including accumulated other comprehensive losses of (7,544) in 2009 and (14,033) in 2008
                                                                        282,008,000                               
        retained earnings, including accumulated other comprehensive losses of (15,202) in 2009 and (14,033) in 2008
                                                                         267,675,000                              
        retained earnings, including accumulated other comprehensive income of (14,033) in 2008 and 4,833 in 2007
                                                                          265,191,000                             
        investments
                                                                           51,526,000 67,691,000 95,275,000                          
        retained earnings and accumulated other comprehensive gains of 1,505 in 2008 and 4,833 in 2007
                                                                           274,542,000                            
        retained earnings and accumulated other comprehensive gains of 3,731 in 2008 and 4,833 in 2007
                                                                            279,078,000                           
        retained earnings, including accumulated other comprehensive gains of 5,317 in 2008 and 4,833 in 2007
                                                                             272,625,000                          
        retained earnings, including accumulated other comprehensive income of 4,833 in 2007 and 1,106 in 2006
                                                                              277,227,000                         
        retained earnings, including accumulated other comprehensive gains of 2,706 in 2007 and 1,106 in 2006
                                                                               270,956,000                        
        retained earnings, including accumulated other comprehensive gains of 2,290 in 2007 and 1,106 in 2006
                                                                                257,493,000                       
        retained earnings, including accumulated other comprehensive gains of 921 in 2007 and 1,106 in 2006
                                                                                 247,733,000                      
        deferred compensation
                                                                                     -4,363,000  -5,706,000                
        retained earnings, including accumulated other comprehensive income of 1,106 in 2006 and (2,181) in 2005
                                                                                  246,816,000                     
        retained earnings, including accumulated other comprehensive gain of 72 in 2006 and (2,182) in 2005
                                                                                   238,879,000                    
        retained earnings, including accumulated other comprehensive loss of 430 in 2006 and 2,181 in 2005
                                                                                    229,506,000                   
        remaining purchase price due to actional shareholders
                                                                                     18,129,000                  
        retained earnings, including accumulated other comprehensive loss of 1,795 in 2006 and 2,182 in 2005
                                                                                     245,572,000                  
        •
                                                                                                       
        contractual obligations
                                                                                                       
        interest payment on long-term debt
                                                                                      482,000                 
        operating leases
                                                                                      31,647,000                 
        retained earnings, including accumulated other comprehensive loss of 2,182 in 2005 and 1,913 in 2004
                                                                                       240,776,000                
        other liabilities
                                                                                        4,189,000 4,220,000              
        commitments and contingent liabilities
                                                                                                       
        common stock; authorized, 100,000 shares; issued and outstanding, 39,576 shares in 2005 and 36,422 shares in 2004, and additional paid-in capital
                                                                                        127,945,000               
        retained earnings, including accumulated other comprehensive loss of 2,047 in 2005 and 1,913 in 2004
                                                                                        228,127,000 216,174,000              
        retained earnings, including accumulated other comprehensive loss of 1,252 in 2005 and 1,913 in 2004
                                                                                          204,852,000             
        retained earnings, including accumulated other comprehensive loss of 1,913 in 2004 and 1,825 in 2003
                                                                                           196,893,000            
        deferred revenue
                                                                                            99,475,000 106,947,000 105,972,000         
        retained earnings, including accumulated other comprehensive loss of 1,868 in 2004 and 1,825 in 2003
                                                                                            186,339,000           
        retained earnings, including accumulated other comprehensive loss of 2,475 in 2004 and 1,825 in 2003
                                                                                             179,469,000          
        retained earnings, including accumulated other comprehensive loss of 1,781 in 2004 and 1,825 in 2003
                                                                                              173,223,000         
        assets current assets:
                                                                                                       
        liabilities and shareholders’ equity current liabilities:
                                                                                                       
        commitments and contingent liabilities shareholders’ equity:
                                                                                                       
      Cashflow Statements:
      Quarterly
      Annual
        Unit: USD2025-11-30 2025-08-31 2025-05-31 2025-02-28 2024-11-30 2024-08-31 2024-05-31 2024-02-29 2023-11-30 2023-08-31 2023-05-31 2023-02-28 2022-11-30 2022-08-31 2022-05-31 2022-02-28 2021-11-30 2021-08-31 2021-05-31 2021-02-28 2020-11-30 2020-08-31 2020-05-31 2020-02-29 2019-11-30 2019-08-31 2019-05-31 2019-02-28 2018-11-30 2018-08-31 2018-05-31 2018-02-28 2017-11-30 2017-08-31 2017-05-31 2017-02-28 2016-11-30 2016-08-31 2016-05-31 2016-02-29 2015-11-30 2015-08-31 2015-05-31 2015-02-28 2014-11-30 2014-08-31 2014-05-31 2014-02-28 2013-11-30 2013-08-31 2013-05-31 2013-02-28 2012-11-30 2012-08-31 2012-05-31 2012-02-29 2011-11-30 2011-08-31 2011-05-31 2011-02-28 2010-11-30 2010-08-31 2010-05-31 2010-02-28 2009-11-30 2009-08-31 2009-05-31 2009-02-28 2008-11-30 2008-08-31 2008-05-31 2008-02-29 2007-11-30 2007-08-31 2007-05-31 2007-02-28 2006-11-30 2006-08-31 2006-05-31 2006-02-28 2005-11-30 2005-08-31 2005-05-31 2005-02-28 2004-11-30 2004-08-31 2004-05-31 2004-02-29 2003-11-30 2003-08-31 2003-05-31 2003-02-28 2002-11-30 2002-08-31 2002-05-31 2002-02-28 
                                                                                                        
          cash flows from operating activities:
                                                                                                        
          net income
        25,745,000 19,413,000 17,029,000 10,946,000 1,147,000 28,464,000 16,188,000 22,639,000 15,335,000 19,098,000 12,090,000 23,674,000 23,708,000 21,797,000 29,110,000 20,454,000 14,926,000 30,976,000 13,557,000 18,961,000 17,661,000 23,977,000 16,968,000 21,116,000 -4,740,000 13,557,000 8,181,000 9,402,000 18,430,000 16,746,000 15,403,000 12,912,000 16,429,000 11,172,000 10,341,000 -525,000 -73,793,000 7,576,000 7,275,000 3,216,000 -9,471,000 -4,128,000 5,769,000 -971,000 14,464,000 11,095,000 12,799,000 11,100,000 15,036,000 24,843,000 3,910,000 31,118,000 36,025,000 5,838,000 -1,908,000 7,489,000 11,680,000 8,600,000 17,960,000 20,521,000 21,276,000 9,243,000 19,058,000 -1,006,000 16,676,000 5,521,000 6,906,000 3,652,000 6,452,000 12,537,000 14,471,000 12,836,000 12,104,000 13,047,000 8,391,000 8,738,000 6,904,000 8,870,000 7,848,000 5,779,000 14,033,000 13,357,000 12,229,000 9,314,000 10,856,000 8,520,000 8,085,000 4,640,000 8,817,000 7,329,000 6,690,000 4,238,000 6,878,000 5,486,000 5,762,000 2,461,000 
          adjustments to reconcile net income to net cash from operating activities:
                                                                                                        
          depreciation and amortization of property and equipment
        1,479,000 1,536,000 1,598,000 1,619,000 1,620,000 1,635,000 1,582,000 1,589,000 1,655,000 1,519,000 1,500,000 1,671,000 1,320,000 1,250,000 1,225,000 1,207,000 1,333,000 1,403,000 1,426,000 1,315,000 1,407,000 1,489,000 1,531,000 1,717,000 2,029,000 2,085,000 1,818,000 1,620,000 1,783,000 1,815,000 1,661,000 1,682,000 1,732,000 1,832,000 1,984,000 1,978,000 2,026,000 2,098,000 2,152,000 2,230,000 2,185,000 2,210,000 2,410,000 2,589,000 2,438,000 2,450,000 2,477,000 2,410,000 1,943,000 2,835,000 3,149,000 2,418,000 2,315,000 2,350,000 2,304,000 2,336,000 2,263,000 2,174,000 2,183,000 2,212,000 2,563,000 2,558,000 2,659,000 3,079,000 3,106,000 3,742,000 2,433,000 2,619,000 2,812,000 2,570,000 2,674,000 2,601,000 2,216,000 2,427,000 2,357,000 2,492,000 2,500,000 2,280,000 2,229,000 2,084,000                 
          amortization of acquired intangibles and other
        34,411,000 37,549,000 36,951,000 36,581,000 25,783,000 20,468,000 24,959,000 25,408,000 25,681,000 25,823,000 25,361,000 19,937,000 17,185,000 17,434,000 17,625,000 17,486,000 13,519,000 11,721,000 11,720,000 10,547,000 10,637,000 5,991,000 6,041,000 5,952,000    8,866,000                 1,873,000 1,488,000 1,096,000 1,064,000 1,118,000 1,062,000 927,000 983,000 3,281,000 6,040,000 6,113,000 6,226,000                                         
          amortization of debt discount and issuance costs
        2,767,000 1,036,000 1,019,000 1,009,000                                                                                             
          stock-based compensation
        17,374,000 15,970,000 16,741,000 14,683,000 11,745,000 10,558,000 11,989,000 12,464,000 10,418,000 10,072,000 10,287,000 9,752,000 10,984,000 8,639,000 9,357,000 8,114,000 7,739,000 6,839,000 8,362,000 6,784,000 6,123,000 5,685,000 5,623,000 6,051,000 5,900,000 5,489,000 6,116,000 5,806,000 5,853,000 4,566,000 5,580,000 4,570,000 4,594,000 4,296,000 3,633,000 1,630,000 3,532,000 5,778,000 6,294,000 6,937,000 5,192,000 6,537,000 6,439,000 5,836,000 6,679,000 6,940,000 5,709,000 5,545,000 5,039,000 5,573,000 5,881,000 4,906,000 6,729,000 7,744,000 6,669,000 7,091,000 7,244,000 9,468,000 5,103,000 4,184,000 4,920,000 4,198,000 4,446,000 4,557,000 4,622,000 8,849,000 4,249,000 3,816,000 7,706,000 3,532,000 4,110,000 3,970,000 4,292,000 4,178,000 7,531,000 4,877,000 5,531,000 5,107,000 5,323,000 6,444,000                 
          non-cash lease expense
        2,432,000 2,871,000 2,435,000 3,443,000 2,825,000 2,366,000 2,273,000 4,259,000 2,435,000 2,251,000 2,748,000 1,959,000 1,862,000 1,886,000 1,958,000 2,075,000 4,851,000 1,912,000 2,045,000 2,138,000 1,957,000 1,745,000 1,820,000 3,087,000                                                                         
          deferred income taxes
        -10,545,000 -6,753,000 -4,435,000 -1,696,000 7,090,000 -8,436,000 -3,109,000 -3,295,000 -10,120,000 -7,485,000 -4,712,000 -6,324,000 -7,316,000 -2,021,000 -483,000 2,218,000 688,000 -891,000 -1,361,000 656,000 -3,161,000 -1,405,000 -23,000 1,967,000 -8,864,000 702,000 -3,638,000 -3,069,000 3,522,000 3,000 -1,084,000 -406,000 -3,044,000 -1,209,000 459,000 4,268,000 2,303,000 -2,437,000 1,957,000 -516,000 21,222,000 5,899,000 -11,033,000 -17,933,000 15,424,000 -856,000 1,974,000 -1,508,000 7,566,000 2,929,000 1,149,000 -1,899,000 -910,000 806,000 -507,000 589,000 5,637,000 -3,992,000 411,000 -187,000 5,159,000 -2,306,000 1,361,000 -210,000 3,386,000 -3,275,000 343,000 -821,000 -5,571,000 -641,000 147,000 2,109,000 -5,970,000 3,320,000 -326,000 -1,151,000 -3,408,000 -1,572,000 -848,000 -1,391,000                 
          credit losses and other sales allowances
        1,009,000 1,519,000 668,000 1,323,000 215,000 -58,000 24,000 363,000 16,000                                                                                        
          changes in operating assets and liabilities:
                                                                                                        
          accounts receivable
        -55,699,000 -14,506,000 -9,373,000 33,008,000 -71,287,000 -8,764,000 3,717,000 30,454,000 -19,359,000 -5,207,000 10,846,000 25,839,000  -17,036,000 6,702,000 13,192,000  -30,424,000 18,264,000 10,841,000  -4,747,000 8,559,000 9,810,000  -19,463,000 6,998,000 3,861,000 -12,945,000 -3,483,000 10,171,000 8,329,000 -9,327,000 -6,882,000 5,714,000 16,937,000 -10,562,000 -8,155,000 11,669,000 7,695,000 -7,413,000 -4,066,000 2,150,000 13,076,000 -9,028,000 -589,000 887,000 8,027,000 -14,295,000 -1,443,000 8,788,000 12,622,000 -15,877,000 6,988,000 13,955,000 9,307,000 -32,202,000 7,964,000 14,624,000 17,667,000 -32,313,000 3,961,000 5,859,000 3,522,000 -12,924,000 6,044,000 12,882,000 -3,721,000 -6,905,000 -5,548,000 5,771,000 2,854,000 -16,260,000 8,930,000 8,045,000 -8,970,000 -15,064,000 4,701,000 8,424,000 -5,285,000 -15,524,000 2,447,000 15,299,000 -7,363,000 -9,692,000 836,000 8,920,000 -5,580,000         
          other assets
        -14,450,000 919,000 5,824,000 -2,168,000 -17,987,000 4,669,000 8,891,000 1,530,000 -15,873,000 1,228,000 8,583,000 4,483,000 -13,388,000 4,341,000 7,914,000 -1,081,000 -17,695,000 868,000 1,507,000 215,000 -7,617,000 4,210,000 2,958,000 2,010,000 -7,936,000 -1,688,000 2,575,000 5,147,000 -14,797,000 -149,000 2,232,000 2,382,000 -970,000 2,837,000 3,224,000 -2,278,000 -59,000 1,578,000 -982,000 -4,462,000 5,936,000 -2,622,000 -3,610,000 5,724,000 -2,313,000 3,720,000 4,512,000 2,303,000 -3,345,000 -760,000 -97,000 -4,833,000 6,959,000 -1,521,000 -3,994,000 103,000                                         
          inventories
                280,000 713,000 2,100,000 -604,000 -292,000 -2,002,000 320,000 418,000                                                                                 
          accounts payable and accrued liabilities
        14,218,000 23,853,000 -16,048,000 -22,821,000 35,718,000 14,688,000 3,413,000 -24,897,000 12,785,000 4,795,000 -1,173,000 -17,649,000 6,472,000 10,275,000 7,118,000 -27,448,000 11,480,000 5,560,000 6,208,000 -17,762,000 13,070,000 620,000 2,229,000 -20,893,000 12,991,000 752,000 8,501,000 -13,128,000 8,448,000 -2,263,000 -197,000 -17,830,000 11,644,000 -4,496,000 -5,486,000 -989,000 11,826,000 2,637,000 -6,390,000 -11,167,000 3,008,000 324,000 1,366,000 -5,068,000 8,389,000 2,012,000 -5,649,000 -13,412,000 2,264,000 5,882,000 -431,000 -22,867,000 3,283,000 -1,413,000 8,809,000 -3,195,000  -3,520,000 -859,000 -22,861,000  -4,867,000 -4,857,000 6,725,000                                 
          lease liabilities
        -2,473,000 -2,545,000 -3,908,000 -3,080,000 -2,874,000 -2,948,000 -2,785,000 -2,949,000 -2,612,000 -2,722,000 -2,824,000 -2,314,000 -2,090,000 -2,144,000 -2,191,000 -2,146,000 -1,966,000 -1,973,000 -2,209,000 -2,258,000 -2,122,000 -1,903,000 -1,720,000 -2,356,000                                                                         
          income taxes payable
        2,034,000 2,151,000 -760,000 -260,000 -899,000 1,730,000 72,000 -461,000 -2,915,000 185,000 2,007,000 170,000 628,000 -548,000 -203,000 3,000 -5,330,000 4,138,000 410,000 -1,469,000 -790,000 -147,000 567,000 373,000 -2,108,000 -283,000 2,183,000 -246,000 -4,465,000 -692,000 2,557,000 -290,000 133,000 358,000 346,000 55,000 -1,916,000 1,063,000 916,000 46,000 -4,886,000 6,027,000 832,000 508,000              5,711,000 2,105,000 3,650,000 -630,000 5,222,000 -2,578,000 -9,361,000 2,335,000 3,689,000 3,662,000 -6,386,000 -1,342,000 622,000 -2,351,000 -2,091,000 1,499,000 -1,327,000 -702,000 1,880,000 -3,680,000 4,222,000 3,565,000 984,000 -1,946,000 1,553,000 -3,426,000 1,254,000 -525,000 2,396,000 2,365,000 -399,000         
          deferred revenue
        44,496,000 -9,567,000 -17,745,000 -3,640,000 25,570,000 -7,719,000 -4,521,000 2,853,000 14,909,000 -5,078,000 -19,414,000 -14,519,000 30,595,000 -3,105,000 -149,000 8,927,000 20,472,000 1,848,000 -6,946,000 15,099,000 9,357,000 -4,718,000 -7,108,000 3,889,000 16,182,000 10,836,000 -3,121,000 5,943,000 3,968,000 -2,543,000 -3,831,000 10,354,000 1,762,000 -4,102,000 -6,277,000 8,985,000 1,349,000 -3,519,000 -3,683,000 11,012,000 4,362,000 1,462,000 4,994,000 24,799,000 3,005,000 -4,757,000 -6,352,000 9,239,000 -744,000 -6,388,000 -8,305,000 10,254,000 2,708,000 -12,844,000 -10,970,000 13,195,000 4,638,000 -5,875,000 -11,021,000 17,651,000 2,136,000 -7,344,000 -15,018,000 19,303,000 -1,238,000 -13,022,000 -12,689,000 17,253,000 1,077,000 -6,781,000 -5,993,000 14,777,000 3,641,000 -3,882,000 -5,479,000 18,526,000 2,193,000 -9,006,000 -3,030,000 16,553,000 969,000 -9,031,000 -8,191,000 17,325,000 809,000 -3,881,000 2,420,000 16,815,000         
          net cash flows from operating activities
        62,798,000 73,446,000 29,996,000 68,947,000 19,651,000 57,658,000 63,681,000 70,504,000 33,161,000 46,041,000 47,951,000 46,767,000 40,137,000 39,670,000 68,260,000 44,093,000 43,928,000 35,224,000 54,690,000 44,688,000 42,762,000 31,112,000 37,957,000 33,016,000 36,601,000 26,765,000 40,674,000 24,444,000 24,327,000 23,301,000 42,129,000 31,595,000 32,515,000 13,442,000 22,429,000 37,300,000 33,935,000 19,648,000 26,760,000 22,502,000 27,352,000 19,257,000 20,791,000 37,140,000 39,225,000 25,929,000 17,116,000 25,424,000    -25,059,000 28,401,000 22,025,000 15,160,000 38,529,000                                         
          capital expenditures
        -2,862,000 -1,055,000 -495,000 -1,290,000 -2,878,000 -1,064,000 -955,000 -309,000 -2,389,000 -1,212,000 -1,584,000 -385,000 -3,004,000 -1,107,000 -1,148,000 -831,000 -1,913,000 -625,000 -950,000 -1,166,000 -3,098,000 -1,662,000 -609,000 -1,148,000 -2,168,000 -750,000 -834,000 -246,000 -1,282,000 -2,772,000 -1,810,000 -1,386,000 -2,512,000 -342,000 -140,000 -383,000 -2,039,000 -1,130,000 -1,203,000  -1,105,000 -1,952,000 -3,147,000 -2,641,000 -1,610,000 -2,154,000 -1,519,000 -6,518,000    -898,000 -1,129,000 -465,000 -2,199,000 -3,942,000                                         
          free cash flows
        59,936,000 72,391,000 29,501,000 67,657,000 16,773,000 56,594,000 62,726,000 70,195,000 30,772,000 44,829,000 46,367,000 46,382,000 37,133,000 38,563,000 67,112,000 43,262,000 42,015,000 34,599,000 53,740,000 43,522,000 39,664,000 29,450,000 37,348,000 31,868,000 34,433,000 26,015,000 39,840,000 24,198,000 23,045,000 20,529,000 40,319,000 30,209,000 30,003,000 13,100,000 22,289,000 36,917,000 31,896,000 18,518,000 25,557,000  26,247,000 17,305,000 17,644,000 34,499,000 37,615,000 23,775,000 15,597,000 18,906,000    -25,957,000 27,272,000 21,560,000 12,961,000 34,587,000                                         
          cash flows from investing activities:
                                                                                                        
          purchases of investments
                -15,262,000         -750,000 -4,259,000 -1,650,000 -3,150,000 -5,000,000 -750,000 -884,000 -7,374,000 -9,898,000 -16,106,000 -13,522,000 -854,000 -7,830,000 -7,891,000 -3,712,000 -22,258,000 -4,110,000 -802,000 -12,045,000 -7,221,000 -3,637,000 -1,900,000     -2,037,000 -19,264,000 -6,623,000                                         
          sales and maturities of investments
                15,300,000 400,000 750,000 300,000 600,000 300,000 1,800,000 1,500,000 1,350,000 1,300,000 1,500,000 850,000 6,284,000 7,767,000 3,540,000 7,071,000 6,554,000 8,155,000 4,606,000 7,772,000 3,907,000 6,816,000 5,655,000 16,464,000 3,285,000 6,155,000 9,200,000 12,390,000 1,700,000 3,185,000 4,190,000 4,495,000 2,846,000 3,095,000 2,190,000 5,500,000 3,835,000 5,600,000 3,068,000 10,475,000 4,350,000 10,860,000 3,880,000 25,330,000 17,660,000 27,195,000                                         
          purchases of property and equipment
        -2,862,000 -1,055,000 -495,000 -1,290,000 -2,878,000 -1,064,000 -955,000 -309,000 -2,389,000 -1,212,000 -1,584,000 -385,000 -3,004,000 -1,107,000 -1,148,000 -831,000 -1,913,000 -625,000 -950,000 -1,166,000 -3,098,000 -1,662,000 -609,000 -1,148,000 -2,168,000 -750,000 -834,000 -246,000 -1,282,000 -2,772,000 -1,810,000 -1,386,000 -2,512,000 -342,000 -140,000 -383,000 -2,039,000 -1,130,000 -1,203,000 -1,414,000 -1,105,000 -1,674,000 -2,070,000 -2,335,000 -802,000 -1,084,000 -402,000 -5,697,000 -1,237,000 -603,000 -1,488,000 -898,000 -1,129,000 -465,000 -2,199,000 -3,942,000 -3,091,000 -5,462,000 -5,142,000 -3,352,000 -2,573,000 -3,015,000 -2,574,000 -1,502,000 -1,308,000 -2,819,000 -1,186,000 -2,056,000 -2,189,000 -2,089,000 -1,354,000 -2,581,000 -3,857,000 -5,003,000 -3,519,000 -6,103,000 -9,433,000 -3,144,000 -4,283,000 -4,878,000 -5,049,000 -1,811,000 -1,943,000 -2,106,000 -4,773,000 -1,911,000 -1,961,000 -2,071,000  -2,379,000 -1,000,000 -1,066,000  -1,693,000   
          payments for acquisitions, net of cash acquired
        -564,000        846,000 -275,000 -355,821,000                   -1,000 -48,879,000       -246,275,000 -12,000,000                                                 
          net cash flows from investing activities
        -3,426,000 -20,513,000 -495,000 -2,485,000  -1,064,000 -955,000 -309,000    -371,068,000 -2,254,000 -673,000   -254,074,000 1,075,000 400,000 2,264,000  -812,000 4,925,000 2,360,000   -218,432,000 7,159,000 3,324,000 5,000,000   -6,756,000 -47,306,000 -38,647,000 4,918,000  3,369,000 -3,215,000 -20,487,000     -14,855,000   374,000 -6,464,000 48,274,000 -6,363,000 83,315,000 55,313,000 25,827,000 -3,505,000 16,505,000                                         
          cash flows (used in) from financing activities:
                                                                                                        
          proceeds from equity plans
        2,928,000 3,280,000 6,522,000 6,238,000                                                                                             
          payments for taxes related to net share settlements of equity awards
        -5,083,000 -5,460,000 -4,641,000 -6,543,000 -35,000 -4,702,000 -5,890,000 -4,276,000 -3,284,000 -4,817,000 -2,419,000 -2,266,000 -3,139,000 -2,788,000 -25,000 -1,481,000 -892,000 -1,259,000 -177,000 -1,946,000 -1,949,000 -2,641,000   -2,057,000 -11,000                                                                   
          repurchases of common stock
            -14,328,000 -49,949,000 -22,500,000 -3,962,000 -15,000,000 -15,000,000 -1,517,000 -24,051,000 -26,473,000 -25,000,000 -20,000,000 -15,000,000 -40,000,000 -20,000,000 -25,000,000 -10,000,000 -20,000,000 -45,000,000 -45,000,000 -30,000,000 -18,982,000 -9,764,000 -15,190,000  -12,991,000 -49,475,000 -9,041,000  -25,041,000 -7,827,000  -17,605,000 -25,210,000 -9,789,000  -64,647,000 -67,235,000 -109,302,000                                             
          proceeds from issuance of convertible senior notes, net of issuance costs of 11,200
                                                                                                        
          purchase of capped calls
                                                                                                    
          dividend equivalent and dividend payments to stockholders
        -132,000 -295,000 -359,000                                                                                             
          proceeds from the issuance of debt
                195,000,000 1,000 7,474,000         1,000               150,000,000                                                     
          repayment of revolving line of credit
        -20,000,000 -40,000,000 -40,000,000 -30,000,000 -80,000,000 -30,000,000 -30,000,000 -30,000,000                                                                                       
          principal payment on term loan
            -257,813,000 -3,437,000 -1,718,000 -1,720,000                                                                                       
          payment of credit facility debt issuance costs
        -250,000                                                                                              
          net cash flows (used in) from financing activities
             -17,477,000 -5,383,000 -62,415,000     -7,890,000 -30,935,000        -9,673,000               -8,906,000 -12,660,000 -51,160,000 -9,467,000          -48,422,000                                               
          effect of exchange rate changes on cash
                   1,207,000 2,169,000 -8,810,000 -5,946,000 729,000 -3,508,000 -3,287,000 2,123,000 1,780,000 411,000 6,726,000 -2,553,000 -1,487,000 2,461,000 -2,396,000 -2,760,000 1,432,000 -2,563,000 -2,068,000 -10,574,000 4,693,000 -1,796,000 7,240,000 5,385,000 1,018,000 -5,408,000 -2,006,000 3,644,000 -1,223,000 -3,098,000 -242,000 -3,242,000 -6,753,000 -6,243,000 -1,581,000 998,000 492,000 3,772,000 -1,036,000 -2,812,000 -839,000 1,292,000 998,000 -6,775,000 1,955,000 -9,861,000 1,081,000 2,523,000 4,784,000 3,167,000 4,778,000 -6,847,000 -9,614,000 4,899,000 3,124,000 10,535,000 -1,789,000 -19,984,000 -7,152,000 2,455,000 2,141,000 4,903,000 832,000 2,615,000 -453,000 1,603,000 814,000 4,199,000 658,000 -2,638,000 2,280,000 -3,507,000 404,000 2,000,000 607,000 -964,000 936,000 1,295,000 -1,673,000 1,517,000 979,000 365,000 955,000 624,000 -275,000 
          net decrease in cash and cash equivalents
                                    6,429,000 1,576,000    -53,129,000    8,351,000 -23,971,000 -8,675,000                                                         
          cash and cash equivalents, beginning of year
                                                                                                        
          cash and cash equivalents, end of year
                                                                                                        
          net cash flows from investing activities:
                                                                                                        
          net cash flows from financing activities:
                                                                                                        
          repurchases of common stock, including excise tax
         -15,000,000 -20,000,000 -30,108,000                                                                                             
          proceeds from issuance of senior convertible notes, net of issuance costs of 11,200
                                                                                                       
          net cash flows from financing activities
         -57,681,000 -59,233,000 -58,870,000     -42,258,000 -35,510,000 -45,842,000 174,798,000    -28,031,000 -10,835,000 -10,477,000 192,449,000 -39,024,000    -27,054,000 -8,545,000 -6,769,000 177,251,000 -31,645,000 -18,659,000 -24,657,000 -52,758,000 -50,697,000  -26,505,000 -18,188,000 -23,365,000     73,000 2,337,000 -26,218,000 142,108,000 2,575,000 -13,521,000 -25,534,000 -5,752,000    -79,992,000 -77,612,000 3,664,000 5,309,000 13,611,000                                         
          effect of exchange rate changes on cash and cash equivalents
         1,750,000 7,577,000 -1,508,000  3,176,000 -145,000 -1,516,000  2,303,000                                                                                       
          net increase in cash and cash equivalents
         -2,998,000 -22,155,000 6,084,000 -114,636,000 42,293,000 57,198,000 6,264,000 -11,041,000 12,468,000 17,550,000 -148,296,000 32,162,000 -748,000 53,197,000 16,260,000 -224,489,000 22,535,000 249,662,000 9,708,000 -122,585,000 27,353,000 32,128,000 6,835,000 30,239,000   1,390,000    -16,353,000    19,871,000      23,093,000 -21,015,000 -76,047,000  40,409,000 -17,385,000 20,538,000  -3,045,000 -60,830,000 -22,575,000  52,514,000                                           
          cash and cash equivalents, beginning of period
         118,077,000  126,958,000  256,277,000  155,406,000  97,990,000  154,259,000  105,126,000  133,464,000  207,036,000  212,379,000  263,082,000  198,818,000  301,792,000  161,095,000                                         
          cash and cash equivalents, end of period
         -2,998,000 -22,155,000 124,161,000  42,293,000 57,198,000 133,222,000  12,468,000 17,550,000 107,981,000  -748,000 53,197,000 171,666,000  22,535,000 249,662,000 107,698,000  27,353,000 32,128,000 161,094,000  20,771,000 -3,267,000 106,516,000  1,576,000 -19,990,000 117,111,000  -53,129,000 -29,021,000 226,907,000  8,351,000 -23,971,000 203,704,000  23,093,000 -21,015,000 187,035,000  40,409,000 -17,385,000 219,356,000  -3,045,000 -60,830,000 279,217,000  52,514,000 10,189,000 231,695,000                                         
          payments for acquisitions
          -1,195,000                                                                                             
          gain on sale of assets held for sale
                                                                                                      
          cash flows (used in) from investing activities:
                                                                                                        
          proceeds from sale of long-lived assets
                                                                                                      
          other investing activities
                                                                                                        
          net cash flows (used in) from investing activities
                -2,389,000 -366,000      -531,000         -278,000       -1,944,000         -1,061,000   -248,542,000                                                     
          cash flows from financing activities:
                                                                                                        
          dividend payments to stockholders
            -7,646,000 -7,692,000 -7,951,000 -8,171,000 -7,885,000 -7,798,000 -7,848,000 -8,023,000 -7,712,000 -7,778,000 -7,789,000 -7,784,000                                                                                 
          amortization of debt discount and issuance costs on notes
             1,005,000 988,000 547,000 526,000 550,000 537,000 534,000 517,000 541,000 529,000 525,000 3,253,000 3,259,000                                                                               
          proceeds from stock-based compensation plans
             4,578,000 5,313,000 7,583,000  4,008,000 7,008,000 9,357,000 5,781,000 2,613,000 3,677,000 4,094,000 5,786,000 2,947,000 2,815,000 3,485,000 2,072,000 1,719,000 3,063,000 4,245,000 2,918,000 2,044,000 2,409,000 1,894,000 1,262,000 3,272,000 2,202,000 2,469,000 2,780,000 2,214,000 2,261,000 2,770,000 1,752,000 2,159,000 2,337,000 3,670,000 2,610,000 4,103,000 3,018,000 3,338,000 5,774,000 3,810,000 3,014,000 3,890,000 5,321,000 16,666,000 3,210,000 29,233,000 4,924,000                                            
          loss on disposal of long-lived assets
                                                                                                        
          proceeds from issuance of senior convertible notes, net of issuance costs of 9.9 million
                                                                                                        
          payment of debt issuance costs
                     -1,957,000                                                                                
          allowances for bad debt and sales credits
                  15,000 158,000 64,000 371,000 194,000 145,000 88,000 -12,000 24,000 -382,000 -252,000 142,000 38,000 236,000 393,000 -134,000 198,000 89,000                                                                     
          payment of principal on long-term debt
                   -1,719,000 -1,719,000 -1,719,000 -1,716,000 -1,719,000 -5,644,000 -5,644,000 -87,262,000 -18,763,000    -1,882,000    -1,547,000                                                                     
          gain on sale of intangible assets
                                                                                                        
          accounts receivable and unbilled receivables
                                                                                                        
          decrease in escrow receivable and other
                                                                                                      
          payment of issuance costs for long-term debt
                                              2,000 -80,000 -1,707,000                                                     
          loss on disposal of property and equipment
                      4,000 4,000 4,000 3,000 321,000 173,000 474,000 57,000 219,000 175,000 -171,000 153,000                                                                     
          impairment of intangible and long-lived assets
                                                                                                        
          proceeds from issuance of senior convertible notes, net of issuance costs of 9,900
                                                                                                       
          dividend payments to shareholders
                         -7,755,000 -7,763,000 -7,854,000 -7,542,000 -7,452,000 -7,438,000 -7,468,000 -6,941,000 -6,933,000 -6,894,000 -6,992,000 -6,317,000 -6,371,000 -6,482,000 -6,619,000  -6,035,000 -6,044,000 -6,072,000                                                             
          decrease in escrow receivable
                          2,130,000                                                                             
          loss on assets held for sale
                                                                                                        
          the company adopted the accounting standard related to revenue recognition ("asc 606") effective december 1, 2018 using the full retrospective method. see note 1. nature of business and summary of significant accounting policies for further information.
                                                                                                        
          proceeds from sale of property, plant and equipment
                                                                                                     
          payment of principle on long-term debt
                             -3,763,000    -1,880,000                                                                       
          excess tax benefit from stock plans
                                        1,307,000 -50,000 -170,000 -183,000 741,000 -47,000 -195,000 -63,000 2,456,000 -397,000 -531,000 -179,000 1,135,000 -274,000 -8,000 -152,000 2,830,000 -467,000 -213,000 -508,000 2,928,000 -167,000 -466,000 -705,000 -2,240,000 212,000 -1,487,000 -2,723,000 -2,560,000 -341,000 -2,405,000 -740,000        -1,102,000        858,000                 
          amortization of intangibles and other
                                 14,737,000    9,199,000 9,670,000 9,620,000  9,644,000 8,504,000 7,382,000  7,789,000 7,817,000 7,710,000  7,924,000 7,950,000 8,546,000                                                     
          the company adopted asc 606 effective december 1, 2018 using the full retrospective method. see note 1. nature of business and basis of presentation for further information.
                                                                                                        
          impairment of goodwill and intangible assets
                                                                                                        
          loss on disposal of property
                                     65,000 1,000 135,000  31,000    66,000     8,000 6,000  14,000 19,000 14,000                                                 
          allowances for accounts receivable
                                     37,000 -34,000 137,000  11,000 2,000 40,000  170,000 -368,000 -136,000  49,000 100,000 207,000  247,000 122,000 86,000  -88,000 115,000 -150,000 366,000 331,000 243,000 200,000                                         
          payment of long-term debt
                                     -1,547,000 -1,547,000 -1,547,000 -3,750,000 -3,750,000 -3,750,000 -1,875,000 -1,875,000 -1,875,000 -3,750,000 -1,875,000 -1,875,000 -1,875,000         -71,000 -103,000 -183,000 -112,000 -86,000 -104,000 -86,000 -92,000 -93,000 -85,000 -88,000 -86,000 -83,000 -81,000 -80,000 -79,000 -77,000 -81,000 -68,000 -72,000 -71,000 -73,000 -65,000 -69,000 -66,000 -62,000 -65,000                 
          changes in fair value of contingent consideration obligation
                                                                                                        
          impairment of goodwill and long-lived assets
                                                                                                        
          excess tax benefits from stock plans
                                                                                                        
          capitalized software development costs
                                                -278,000 -1,077,000 -306,000 -808,000 -1,070,000 -1,117,000 -821,000                                                 
          proceeds from divestitures
                                                4,500,000 3,300,000 37,739,000 73,381,000                                             
          decrease in other noncurrent assets
                                                               -350,000                                         
          purchase of common stock related to withholding taxes from issuance of restricted stock units
                                                                                                        
          dividend payment to shareholders
                                                                                                        
          payment of contingent consideration
                                                                                                     
          net decrease in cash and equivalents
                                                                                          3,496,000 -4,997,000   25,277,000 -60,489,000         
          cash and equivalents, beginning of year
                                                                                                        
          cash and equivalents, end of year
                                                                                                        
          asset impairment
                                                963,000 52,000       111,000 23,000 27,000                                           
          purchases of stock related to withholding taxes from the issuance of restricted stock units
                                         -2,000 -1,061,000 -1,306,000  -2,342,000 -409,000                                                         
          loss on sale of auction rate securities
                                                                                                        
          redemptions and sales of auction rate securities - available-for-sale
                                                                                                        
          repurchase of common stock
                                                                -65,117,000 -69,993,000 -39,922,000 -24,977,000 -17,800,000 -1,526,000 -10,010,000 -321,000 -1,378,000 -2,055,000 -1,712,000 -3,195,000 -45,395,000 -16,766,000 -46,155,000 -18,502,000 -291,000 -19,238,000 -302,000 -1,000 -9,317,000 -3,361,000 -2,439,000 -3,252,000 -266,000 -5,757,000 -906,000 -7,799,000 -3,233,000 -1,028,000  -6,838,000 -1,534,000 -3,331,000  -11,041,000 -3,155,000 -3,528,000 
          net increase in cash and equivalents
                                                               70,600,000 -96,674,000 -52,673,000 -1,706,000 25,589,000 31,510,000 27,321,000 48,564,000 3,291,000 63,754,000 -21,784,000 18,953,000 18,465,000 -115,784,000 -4,344,000 49,672,000 113,062,000 3,393,000 2,079,000 -8,038,000 9,996,000 -3,106,000 946,000 -4,976,000 13,187,000 -1,380,000    -46,000    26,587,000 10,812,000 5,021,000 -7,728,000 -12,879,000 5,774,000 7,092,000 9,101,000 
          gain on sale of dispositions
                                                           -35,106,000                                             
          loss on sales of auction rate securities
                                                                                                        
          redemptions and sales of auction rate securities
                                                         25,000                                             
          purchases of common stock related to withholding taxes from the issuance of restricted stock units
                                                     -3,136,000 -5,000  -908,000 -1,484,000 -431,000                                             
          impairment loss on assets held for sale
                                                                                                        
          gain on dispositions
                                                         -35,885,000                                               
          income taxes payable and uncertain tax positions
                                                     1,713,000 -229,000 639,000 2,468,000 -228,000 -907,000 -21,627,000 20,377,000 8,084,000 -6,462,000 -4,382,000                                         
          increase in other noncurrent assets
                                                     40,000 212,000 -108,000  663,000 225,000 -53,000  299,000                                           
          tax deficiency from stock plans
                                                                                                        
          tax benefit (deficiency) from stock plans
                                                       69,000                                                 
          loss on sale of auction rate security
                                                                                                        
          tax benefit from stock plans
                                                           -481,000 -392,000 -238,000 526,000 275,000  511,000 2,073,000 3,361,000  1,256,000 3,162,000 1,640,000                 5,035,000 10,743,000               
          payment of issuance costs for line of credit
                                                                                                        
          tax (deficiency) benefit from stock plans
                                                         274,000                                               
          net cash flows (used in) from operating activities
                                                         -1,861,000                                               
          redemptions of auction rate securities - trading
                                                                                                        
          redemptions at par by issuers of auction rate securities
                                                             2,700,000 225,000  100,000 6,000,000 200,000                                     
          payment of issuance costs for revolving line of credit
                                                                                                        
          supplemental disclosure:
                                                                                                        
          cash paid for income taxes, net of refunds of 632 in 2012 and 8,441 in 2011
                                                                                                        
          issuance of common stock
                                                              6,514,000 13,973,000 8,176,000 5,699,000 16,940,000 18,857,000 25,856,000 4,818,000 41,879,000 21,117,000 7,345,000 1,965,000 4,085,000 1,357,000 3,794,000 3,687,000 6,641,000 11,383,000 17,830,000 7,310,000 11,678,000 5,681,000    4,165,000                 
          withholding tax payments related to net issuance of restricted stock units
                                                              -1,568,000 -884,000 -986,000 -215,000   -1,147,000                                    
          cash paid for income taxes, net of refunds of 127 in 2012 and 7,796 in 2011
                                                                                                        
          cash paid for income taxes, net of refunds of 127 in 2012 and 3,582 in 2011
                                                               7,717,000                                         
          changes in operating assets and liabilities, net of effects from acquisitions:
                                                                                                        
          accounts payable and accrued expenses
                                                                        5,205,000 -3,844,000 -5,779,000 -22,377,000 9,361,000 1,355,000 4,057,000 -21,639,000 16,278,000 -628,000 2,854,000 -20,781,000 19,326,000 -2,468,000 -2,376,000 -20,024,000 5,947,000 4,759,000 5,682,000 -11,311,000 7,318,000 948,000 1,862,000 -9,271,000         
          redemptions at par by issuers of auction rate securities - available-for-sale
                                                                                                        
          redemptions and sales at par of auction rate securities - trading
                                                                                                        
          acquisitions, net of cash acquired
                                                                               -5,728,000      -5,628,000 -4,405,000 -62,033,000  2,435,000   -11,800,000 -87,520,000  1,124,000 -25,164,000     
          amortization of acquired intangible assets
                                                                 5,903,000 5,912,000 6,249,000  7,572,000 8,021,000 7,462,000  7,120,000 7,543,000 7,094,000  4,327,000 4,166,000 4,047,000  4,316,000 4,439,000 4,471,000  4,216,000 3,977,000 2,907,000                 
          other current assets
                                                                 1,929,000 1,809,000 506,000  465,000 -3,038,000 -723,000  3,264,000 -5,890,000 3,366,000  1,723,000 -354,000 -208,000  2,067,000 -2,926,000 2,047,000  -836,000 1,139,000 -3,677,000  -1,173,000 499,000 713,000  1,993,000 -693,000 316,000         
          net cash from operating activities
                                                                 29,085,000 38,813,000 50,230,000 25,666,000 19,617,000 16,670,000 34,248,000 27,036,000 17,801,000 13,530,000 4,391,000 26,745,000 13,606,000 27,019,000 19,812,000 32,171,000 32,818,000 26,768,000 12,250,000 19,608,000 15,721,000 27,268,000 5,318,000 16,780,000 15,987,000 33,659,000 14,204,000 16,755,000 15,120,000 26,990,000 13,323,000         
          purchases of investments available for sale
                                                                 -40,600,000 -38,240,000 -26,285,000  -744,000 -9,186,000 -4,622,000  -56,745,000 -11,527,000 -1,791,000  -2,047,000 -138,759,000 -138,181,000 -88,054,000 -65,011,000 -43,050,000 -52,499,000 -85,577,000 -85,502,000 -86,961,000 -83,460,000 -109,818,000 -136,354,000 -38,831,000    -1,601,000  -12,188,000 -20,789,000 -2,756,000  -10,565,000 -7,761,000 -5,155,000 
          sales and maturities of investments available for sale
                                                                 28,608,000 18,397,000 3,430,000  9,830,000 1,298,000 19,768,000  9,654,000 5,594,000 20,336,000  40,375,000 40,495,000 271,989,000 109,020,000 53,939,000 20,016,000 60,541,000 45,193,000 76,072,000 60,969,000 159,460,000                 
          acquisitions
                                                                     -9,000 -91,000 -49,086,000                                 
          decrease in other non-current assets
                                                                 74,000 -953,000 65,000  44,000            -126,000    -80,000 179,000 26,000  -1,767,000 2,010,000 81,000             
          net cash from investing activities
                                                                 -17,280,000 -19,938,000 -25,942,000 -24,500,000 16,371,000 -3,932,000 -33,102,000 24,810,000 -43,223,000 -7,064,000 16,298,000 -123,216,000 30,830,000 30,089,000 124,847,000 -34,412,000 -39,244,000 -49,541,000 11,588,000 -23,983,000 -18,357,000 -33,042,000 5,614,000 -22,107,000 -43,542,000 -46,355,000 -20,481,000 -22,851,000 12,962,000 -3,799,000 -79,926,000         
          net cash from financing activities
                                                                 -65,559,000 -23,104,000 -3,483,000 27,177,000 -13,445,000 42,673,000 11,759,000 7,009,000 514,000 1,952,000 -435,000 671,000 -41,628,000 -9,891,000 -33,738,000 731,000 7,673,000 12,120,000 -13,389,000 -334,000 2,768,000 -3,401,000 1,597,000 6,585,000 15,616,000 19,699,000 876,000 4,050,000 -4,099,000 3,050,000 5,178,000         
          cash and equivalents, beginning of period
                                                                 286,559,000  175,873,000  96,485,000  53,879,000  46,449,000  1,000 -17,001,000 57,399,000  -1,000 69,939,000  152,117,000  117,425,000  108,337,000 
          cash and equivalents, end of period
                                                                 -52,673,000 -1,706,000 312,148,000  27,321,000 48,564,000 179,164,000  -21,784,000 18,953,000 114,950,000  -4,344,000 49,672,000 166,941,000  2,079,000 -8,038,000 56,445,000  947,000 -21,977,000 70,586,000  -9,659,000 3,495,000 64,942,000  24,590,000 25,277,000 91,628,000  10,812,000 5,021,000 109,697,000  5,774,000 7,092,000 117,438,000 
          amortization of intangible assets
                                                                                                        
          purchases of investments available-for-sale
                                                                                                        
          sales and maturities of investments available-for-sale
                                                                                                        
          redemptions at par by issuers of auction rate securities — available-for-sale
                                                                                                        
          redemptions and sales at par of auction rate securities — trading
                                                                                                        
          redemptions and repurchases of auction rate securities
                                                                                                        
          redemptions of auction rate securities
                                                                      6,475,000 2,250,000                                 
          increase in other non-current assets
                                                                       90,000  -363,000 55,000 -191,000  -1,426,000 -337,000 -74,000    200,000            -343,000      107,000   
          impairment of certain erp costs
                                                                                                        
          amortization of capitalized software costs
                                                                                44,000 44,000 43,000 44,000 44,000 44,000 43,000 44,000                 
          impairment of goodwill
                                                                                                        
          purchase of technology
                                                                                                        
          acquisitions, net of cash acquired and purchase price settlements
                                                                                                        
          tax benefit (deficiency) from stock options
                                                                                                        
          excess tax benefit from stock options
                                                                         -10,000    -157,000    434,000 806,000 233,000  32,000                   
          redemptions of ars
                                                                                                        
          investment in iona technologies
                                                                                                       
          tax benefit from stock options
                                                                          -127,000 -104,000  67,000 636,000 1,658,000  326,000 153,000 77,000  163,000                   
          acquisition, net of cash acquired
                                                                                                        
          in-process research and development
                                                                                    900,000     2,600,000         
          write-down for asset impairment
                                                                                                       
          loss on disposal of fixed assets
                                                                                                        
          repurchase of stock in subsidiary
                                                                                                        
          capitalized software costs
                                                                                                        
          issuance of stock in subsidiary
                                                                                                        
          issuance of common stock from stock plans
                                                                                     2,803,000                   
          repurchase of stock in subsidiary, net of issuances
                                                                                                        
          issuance (repurchase) of stock in subsidiary
                                                                                                        
          depreciation and amortization
                                                                                         4,688,000 4,449,000 4,279,000  4,166,000 4,154,000 3,970,000         
          deferred income taxes and other
                                                                                         -11,356,000 28,000 -7,000  142,000 -123,000 232,000         
          maturities of investments available for sale
                                                                                         67,419,000 124,528,000 20,375,000    11,609,000  9,864,000 4,007,000 3,582,000  10,898,000 5,744,000 6,612,000 
          proceeds from issuance of common stock
                                                                                         19,368,000 20,020,000 6,696,000 4,956,000 3,700,000 6,283,000 6,206,000  6,173,000 10,818,000 2,633,000  3,507,000 2,487,000 2,351,000 
          repayment of long-term debt
                                                                                         -33,000 -55,000 -63,000             
          investment impairment charge
                                                                                                        
          purchases of short-term investments
                                                                                             -13,573,000           
          maturities and sales of short-term investments
                                                                                             28,519,000           
          increases in other non-current assets
                                                                                                        
          purchase of property and equipment
                                                                                                       -1,099,000