7Baggers

Tutor Perini Corporation
(NYSE:TPC) 

TPC stock logo

Tutor Perini Corporation, a construction company, provides diversified general contracting, construction management, and design-build services to private customers and public agencies worldwide. The company operates through three segments: Civil, Building, and Specialty Contractors. The Civil segmen...

Founded: 1894
Full Time Employees: 9,100
Sector: Industrials
Industry: Engineering & Construction

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Quarterly
Annual
    Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 
                                                                               
      revenue
    1,389,458,000 1,507,365,000 1,415,360,000 1,373,681,000 1,246,633,000 1,067,649,000 1,082,816,000 1,127,470,000 1,048,987,000 1,060,705,000 1,021,751,000 776,300,000 906,648,000 1,070,926,000 861,027,000 952,154,000 1,036,770,000 1,178,222,000 1,219,243,000 1,207,595,000 1,349,516,000 1,442,091,000 1,276,427,000 1,250,729,000 1,177,725,000 1,189,345,000 1,125,275,000 958,487,000 4,451,390,622 1,123,137 1,120,085 1,028,156,000 4,753,643,860 1,199,505 1,247,274 1,117,361,000 1,246,599,000 1,332,978,000 1,308,130,000 1,085,369,000                                    
      yoy
    11.46% 41.19% 30.71% 21.84% 18.84% 0.65% 5.98% 45.24% 15.70% -0.95% 18.67% -18.47% -12.55% -9.11% -29.38% -21.15% -23.17% -18.30% -4.48% -3.45% 14.59% 21.25% 13.43% 30.49% -73.54% 105794.92% 100363.36% -6.78% -6.36% -6.37% -10.20% -7.98% 281.33% -99.91% -99.90% 2.95%                                        
      qoq
    -7.82% 6.50% 3.03% 10.19% 16.76% -1.40% -3.96% 7.48% -1.10% 3.81% 31.62% -14.38% -15.34% 24.38% -9.57% -8.16% -12.01% -3.36% 0.96% -10.52% -6.42% 12.98% 2.05% 6.20% -0.98% 5.69% 17.40% -78.47% 396235.50% 0.27% -99.89% -78.37% 396200.46% -3.83% -99.89% -10.37% -6.48% 1.90% 20.52%                                     
      cost of operations
    -1,234,825,000 -1,359,641,000 -1,245,965,000 -1,177,686,000 -1,112,232,000 -1,077,111,000 -1,108,644,000 -1,010,392,000 -933,736,000 -1,009,792,000 -956,790,000 -800,469,000 -943,498,000 -1,020,586,000 -895,250,000 -901,809,000 -922,300,000 -1,064,245,000 -1,091,754,000 -1,097,140,000 -1,217,112,000 -1,317,176,000 -1,158,673,000 -1,139,649,000 -1,240,429,000 -1,074,282,000 -1,024,332,000 -870,017,000 -3,997,234,454 -1,012,013 -1,001,445 -961,088,000 -4,299,562,668 -1,081,254 -1,144,436 -1,014,641,000 -1,128,939,000 -1,208,310,000 -1,198,360,000 -980,277,000 -7,994,281,000 1,240,538,000 1,213,818,000 975,706,000 1,072,154,000 1,109,848,000 954,979,000 849,886,000 959,556,000 909,531,000 947,110,000 892,571,000 987,749,000 983,930,000 898,285,000 826,375,000 989,447,000 1,046,055,000 732,648,000 552,826,000 615,820,000 641,136,000 815,464,000 788,942,000  1,083,403,000 1,274,535,000 1,411,372,000  1,317,389,000 1,189,774,000  1,178,771,000 1,086,718,000 929,459,000 
      gross profit
    154,633,000 147,724,000 169,395,000 195,995,000 134,401,000 -9,462,000 -25,828,000 117,078,000 115,251,000 50,913,000 64,961,000 -24,169,000 -36,850,000 50,340,000 -34,223,000 50,345,000 114,470,000 113,977,000 127,489,000 110,455,000 132,404,000 124,915,000 117,754,000 111,080,000 -62,704,000 115,063,000 100,943,000 88,470,000 454,156,168 111,124 118,640 67,068,000 454,081,192 118,251 102,838 102,720,000 117,660,000 124,668,000 109,770,000 105,092,000 66,673,000 100,201,000 98,620,000 90,759,000 129,723,000 140,841,000 129,531,000 105,347,000 139,735,000 120,857,000 105,955,000 100,357,000 126,449,000 115,463,000 87,061,000 86,159,000 125,313,000 120,355,000 87,210,000 62,463,000 72,133,000 90,670,000 98,912,000 76,133,000  85,366,000 108,213,000 106,910,000  70,998,000 66,562,000  63,895,000 64,902,000 57,897,000 
      yoy
    15.05% -1661.23% -755.86% 67.41% 16.62% -118.58% -139.76% -584.41% -412.76% 1.14% -289.82% -148.01% -132.19% -55.83% -126.84% -54.42% -13.54% -8.76% 8.27% -0.56% -311.16% 8.56% 16.65% 25.56% -113.81% 103444.69% 84983.45% 31.91% 0.02% -6.03% 15.37% -34.71% 285.93% -99.91% -99.91% -2.26% 76.47% 24.42% 11.31% 15.79% -48.60% -28.86% -23.86% -13.85% -7.16% 16.54% 22.25% 4.97% 10.51% 4.67% 21.70% 16.48% 0.91% -4.06% -0.17% 37.94% 73.72% 32.74% -11.83% -17.96%  6.21% -8.60% -28.79%  20.24% 62.57%   9.39% 14.97%     
      qoq
    4.68% -12.79% -13.57% 45.83% -1520.43% -63.37% -122.06% 1.59% 126.37% -21.63% -368.78% -34.41% -173.20% -247.09% -167.98% -56.02% 0.43% -10.60% 15.42% -16.58% 6.00% 6.08% 6.01% -277.15% -154.50% 13.99% 14.10% -80.52% 408593.14% -6.34% -99.82% -85.23% 383897.76% 14.99% -99.90% -12.70% -5.62% 13.57% 4.45% 57.62% -33.46% 1.60% 8.66% -30.04% -7.89% 8.73% 22.96% -24.61% 15.62% 14.06% 5.58% -20.63% 9.51% 32.62% 1.05% -31.24% 4.12% 38.01% 39.62% -13.41% -20.44% -8.33% 29.92%   -21.11% 1.22%   6.66%   -1.55% 12.10%  
      gross margin %
    11.13% 9.80% 11.97% 14.27% 10.78% -0.89% -2.39% 10.38% 10.99% 4.80% 6.36% -3.11% -4.06% 4.70% -3.97% 5.29% 11.04% 9.67% 10.46% 9.15% 9.81% 8.66% 9.23% 8.88% -5.32% 9.67% 8.97% 9.23% 10.20% 9.89% 10.59% 6.52% 9.55% 9.86% 8.25% 9.19% 9.44% 9.35% 8.39% 9.68% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% NaN% Infinity% Infinity% Infinity% NaN% Infinity% Infinity% NaN% Infinity% Infinity% Infinity% 
      general and administrative expenses
    -95,451,000 -97,612,000 -129,301,000 -119,565,000 -69,076,000 -76,783,000 -80,979,000 -76,585,000 -66,445,000 -63,479,000 -62,573,000 -57,776,000 -60,561,000 -57,232,000 -56,331,000 -60,252,000 -58,216,000 -61,884,000 -58,736,000 -60,751,000 -58,004,000 -41,894,000 -60,058,000 -63,853,000 -31,442,000 -67,120,000 -62,797,000 -65,557,000 -262,381,364 -63,818 -63,825 -67,993,000 -274,724,326 -69,179 -68,793 -65,703,000 -65,610,000 -63,749,000 -60,941,000 -64,970,000 -450,481,000 61,227,000 67,739,000 70,675,000 65,327,000 70,487,000 64,088,000 63,850,000 69,560,000 62,763,000 66,481,000 64,278,000 65,725,000 60,787,000 64,661,000 69,196,000 74,521,000 58,319,000 50,175,000 43,950,000 31,436,750 40,710,000 43,061,000 41,976,000  42,905,000 44,453,000 44,276,000  28,398,000 27,599,000  30,396,000 24,181,000 25,157,000 
      income from construction operations
    59,182,000 50,112,000 40,094,000 76,430,000 65,325,000   40,493,000 48,806,000  2,388,000  -97,411,000 -6,892,000 -90,554,000 -9,907,000 56,254,000 52,093,000 68,753,000 49,704,000 74,400,000 83,021,000 57,696,000 47,227,000 -94,146,000 47,943,000 -341,717,000 22,913,000 191,774,804 47,306 54,815 -925,000 179,356,866 49,072 34,045 37,017,000 52,050,000 60,919,000 48,829,000 40,122,000 15,474,000 38,974,000 30,881,000 20,084,000 64,396,000 70,354,000 65,443,000 41,497,000 70,175,000 58,094,000 39,474,000 36,079,000 60,724,000 54,676,000 -354,174,000 16,963,000 50,792,000 62,036,000 37,035,000 18,513,000 32,344,000 49,960,000 55,851,000 34,157,000  42,461,000 63,760,000 62,634,000  42,600,000 38,963,000  33,499,000 40,721,000 32,740,000 
      other income
    10,726,000 9,163,000 7,457,000 6,204,000 4,688,000 4,242,000 4,487,000 5,838,000 5,311,000 2,967,000 3,058,000 6,417,000 1,618,000 397,000 1,020,000 3,697,000 862,000 -464,000 1,431,000 175,000 -3,489,000 -8,048,000 -797,000 481,000 3,671,000 1,674,000 900,000 422,000 4,252,261 1,909 1,050 780,000 43,839,627 967 40,990 417,000 1,763,000 2,048,000 2,485,000 682,000 7,192,000 5,916,000 100,000 -754,000 1,252,000 -441,000       -1,176,000 545,000 1,082,000 -2,308,000 -2,227,000 5,863,000 1,232,000 -447,000 -1,881,000 358,000 -1,102,000 345,000  474,000 619,000 1,266,000  2,535,000 1,505,000  4,425,000 2,800,000 2,356,000 
      interest expense
    -13,397,000 -13,476,000 -13,549,000 -13,588,000 -14,352,000 -25,519,000 -21,223,000 -23,084,000 -19,307,000 -20,313,000 -22,016,000 -21,513,000 -19,927,000 -17,015,000 -16,204,000 -16,492,000 -16,584,000 -16,694,000 -17,938,000 -17,810,000 -17,699,000 -25,613,000 -16,464,000 -16,436,000 -16,242,000 -17,305,000 -17,522,000 -16,425,000 -63,471,526 -16,411 -15,998 -15,065,000 -69,330,274 -15,643 -22,519 -15,564,000 -15,127,000 -15,041,000 -15,534,000 -14,080,000 -10,979,000 -10,935,000 -10,989,000 -11,125,000 -11,731,000 -11,297,000       -11,450,000 -11,039,000 -10,603,000 -11,082,000 -9,777,000 -11,566,000 -7,252,000 -7,155,000 -4,210,000 -1,589,000 -3,244,000 -1,521,000  -1,987,000 -2,864,000 -1,230,000  -394,000 -355,000  -406,000 -431,000 -690,000 
      income before income taxes
    56,511,000 45,799,000 34,002,000 69,046,000 55,661,000 -107,522,000 -123,543,000 23,247,000 34,810,000 -29,912,000 -16,570,000 -97,041,000 -115,720,000 -23,510,000 -105,738,000 -22,702,000 40,532,000 34,935,000 52,246,000 32,069,000 53,212,000 49,360,000 40,435,000 31,272,000 -106,717,000 32,312,000 -358,339,000 6,910,000 132,555,539 32,804 39,867 -15,210,000 153,866,219 34,396 52,516 21,870,000 38,686,000 47,926,000 35,780,000 26,724,000 11,687,000 33,955,000 19,992,000 8,205,000 53,917,000 58,616,000 47,612,000 27,293,000 53,507,000 37,035,000 25,157,000 23,916,000 48,098,000 44,182,000 -363,695,000 3,573,000 38,788,000 56,333,000 31,015,000 10,911,000 26,253,000 48,729,000 51,505,000 32,981,000  40,948,000 61,515,000 62,670,000  44,741,000 40,113,000  37,518,000 43,090,000 34,406,000 
      income tax expense
    -16,983,000   -21,960,000 -12,912,000            -6,573,250 -8,694,000 -10,635,000 -6,964,000    -5,134,000                                                    
      net income
    39,528,000 34,398,000 18,848,000 47,086,000 42,749,000 -76,208,000 -89,602,000 15,969,000 27,502,000 -25,826,000 -16,764,000 -48,929,000 -87,669,000 -24,070,000 -62,020,000 -18,813,000 41,193,000 26,241,000 41,611,000 25,105,000 46,017,000 49,323,000 30,859,000 26,138,000 -76,229,000 26,721,000 -315,439,000 4,722,000 97,738,610 25,436 27,896 -10,942,000 154,472,303 25,300 32,633 13,764,000 30,261,000 28,801,000 21,361,000 15,400,000 8,712,000 19,677,000 11,777,000 5,126,000 27,722,000 35,730,000 28,545,000 15,939,000 33,259,000 23,759,000 15,478,000 14,800,000 41,635,000 42,591,000 -348,423,000 -1,203,000 24,048,000 35,477,000 19,694,000 6,929,000 18,909,000 30,933,000 32,725,000 20,933,000  26,684,000 38,897,000 38,981,000  28,557,000 25,153,000  24,011,000 27,578,000 22,653,000 
      yoy
    -7.53% -145.14% -121.04% 194.86% 55.44% 195.08% 434.49% -132.64% -131.37% 7.30% -72.97% 160.08% -312.82% -191.73% -249.05% -174.94% -10.48% -46.80% 34.84% -3.95% -160.37% 84.59% -109.78% 453.54% -177.99% 104951.89% -1130867.85% -143.15% -36.73% 0.54% -14.52% -179.50% 410.47% -99.91% -99.85% -10.62% 247.35% 46.37% 81.38% 200.43% -68.57% -44.93% -58.74% -67.84% -16.65% 50.39% 84.42% 7.70% -20.12% -44.22% -104.44% -1330.26% 73.13% 20.05% -1869.18% -117.36% 27.18% 14.69% -39.82% -66.90%  15.92% -15.87% -46.30%  -6.56% 54.64%   3.55% 11.04%     
      qoq
    14.91% 82.50% -59.97% 10.15% -156.10% -14.95% -661.10% -41.94% -206.49% 54.06% -65.74% -44.19% 264.23% -61.19% 229.67% -145.67% 56.98% -36.94% 65.75% -45.44% -6.70% 59.83% 18.06% -134.29% -385.28% -108.47% -6780.20% -95.17% 384153.07% -8.82% -100.25% -107.08% 610462.46% -22.47% -99.76% -54.52% 5.07% 34.83% 38.71% 76.77% -55.72% 67.08% 129.75% -81.51% -22.41% 25.17% 79.09% -52.08% 39.98% 53.50% 4.58% -64.45% -2.24% -112.22% 28862.84% -105.00% -32.22% 80.14% 184.23% -63.36% -38.87% -5.48% 56.33%   -31.40% -0.22%   13.53%   -12.93% 21.74%  
      net income margin %
    2.84% 2.28% 1.33% 3.43% 3.43% -7.14% -8.27% 1.42% 2.62% -2.43% -1.64% -6.30% -9.67% -2.25% -7.20% -1.98% 3.97% 2.23% 3.41% 2.08% 3.41% 3.42% 2.42% 2.09% -6.47% 2.25% -28.03% 0.49% 2.20% 2.26% 2.49% -1.06% 3.25% 2.11% 2.62% 1.23% 2.43% 2.16% 1.63% 1.42% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% -Infinity% -Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% NaN% Infinity% Infinity% Infinity% NaN% Infinity% Infinity% NaN% Infinity% Infinity% Infinity% 
      less: net income attributable to noncontrolling interests
    13,832,000 5,561,000 15,217,000 27,112,000 14,751,000 3,223,000 11,260,000 15,157,000 11,742,000 11,070,000 20,770,000 267,000 5,248,000 8,385,000 983,000 2,821,000 11,861,000 10,847,000 10,446,000 9,071,000 10,522,000 12,504,000 12,150,000 8,767,000 9,888,000 7,408,000 5,091,000 5,078,000 14,336,641 4,164 3,013 1,182,000 -6,157,747 -1,716 -2,537                                         
      net income attributable to tutor perini corporation
    25,696,000 28,837,000 3,631,000 19,974,000 27,998,000   812,000 15,760,000    -92,917,000 -32,455,000 -63,003,000 -21,634,000 29,332,000 15,394,000 31,165,000 16,034,000 35,495,000 36,819,000 18,709,000 17,371,000 -86,117,000 19,313,000 -320,530,000  83,401,969 21,272 24,883 -12,124,000 148,314,556 23,584 30,096                                         
      basic earnings per common share
    490 550 70 380 530   20 300    -1,810 -630 -1,230 -420 570 300 610 310 700 720 370 350 -1,710 380 -6,380  1,669.32 0.43 0.5 -240 2,988.64 0.47 0.61 280 620 590 430 310 170 400 240 110 570 740 590 330 690 500 320 310 880 900 -7,350 -30 500 750 420 150 437.5 650 670 430  550 800 800  1,050 930  890 1,030 850 
      diluted earnings per common share
    480 540 70 380 530   20 300    -1,810 -630 -1,230 -420 570 300 610 310 690 720 370 340 -1,710 380 -6,380  1,659.32 0.42 0.49 -240 2,918.67 0.47 0.59 270 600 570 430 310 170 400 240 100 560 730 580 330 690 490 320 310 880 880 -7,350 -30 500 740 410 140 432.5 650 660 420  540 790 800  1,030 910  870 1,010 840 
      weighted-average common shares outstanding:
                                                                               
      basic
    52,736,000 52,693,000 52,743,000 52,724,000 52,537,000 52,322,000 52,408,000 52,327,000 52,092,000 51,994,000 51,803,000 51,551,000 51,324,000 51,404,000 51,276,000 51,107,000 51,017,000 51,072,000 50,999,000 50,913,000 50,656,000 50,787,000 50,667,000 50,338,000 50,220,000 50,279,000 50,224,000 50,098,000 49,952,000 50,018 49,946 49,814,000 49,647,000 49,775 49,735 49,282,000 49,150,000 49,185,000 49,131,000 49,079,000 48,981,000 49,070,000 49,028,000 48,747,000 48,562,000 48,588,000 48,543,000 48,440,000 47,851,000 47,959,000 47,684,000 47,559,000 47,470,000 47,556,000 47,434,000 47,330,000 47,226,000 47,291,000 47,183,000 47,100,000 48,111 47,357,000 49,001,000   48,531,000 48,521,000 48,514,000 34,272,000 27,171,000 27,145,000 26,819 26,936,000 26,713,000 26,638,000 
      diluted
    53,750,000 53,413,000 53,664,000 53,194,000 53,010,000 52,322,000 52,408,000 52,848,000 52,515,000 51,994,000 51,803,000 51,551,000 51,324,000 51,404,000 51,276,000 51,107,000 51,369,000 51,366,000 51,375,000 51,348,000 51,077,000 51,241,000 50,935,000 50,836,000 50,220,000 50,582,000 50,224,000 50,098,000 50,301,000 50,375 50,440 49,814,000 50,759,000 50,587 50,755 50,948,000 49,864,000 50,100,000 49,561,000 49,285,000 49,666,000                    48,649           27,419    
      income tax benefit
     -11,401,000 -15,154,000   31,314,000 33,941,000 -7,278,000 -7,308,000 4,086,000 -194,000 48,112,000 28,051,000 -560,000 43,718,000 3,889,000     -7,195,000 -37,000 -9,576,000  30,488,000 -5,591,000 42,900,000 -2,188,000    4,268,000                                            
      loss from construction operations
         -86,245,000 -106,807,000   -12,566,000  -81,945,000                                                                
      net loss attributable to tutor perini corporation
         -79,431,000 -100,862,000   -36,896,000 -37,534,000 -49,196,000                -356,000                                                
      basic loss per common share
         -1,520 -1,920   -710 -720 -950                -10                                                
      diluted loss per common share
         -1,520 -1,920   -710 -720 -950                -10                                                
      goodwill impairment
                              -379,863,000                                                 
      provision for income taxes
                                -3,767.75 -7,368 -11,971  -9,271 -9,096 -19,883 -8,106,000 -8,425,000 -19,125,000  -11,324,000 -2,975,000 -14,278,000 -8,215,000 -3,079,000 -13,326,750 -22,886,000              -3,982,000 -7,344,000 -17,796,000 -18,780,000 -12,048,000  -14,264,000 -22,618,000 -23,689,000  -16,184,000 -14,960,000  -13,507,000 -15,512,000 -11,753,000 
      benefit from income taxes
                                          -14,419,000                 -4,776,000 -14,740,000 -20,856,000 -11,321,000                 
      revenues
                                            929,910,500 1,340,739,000 1,312,438,000 1,066,465,000 1,201,877,000 1,250,689,000 1,084,510,000 955,233,000 1,099,291,000 1,030,388,000 1,053,065,000 992,928,000 1,114,198,000 1,099,393,000 985,346,000 912,534,000 1,114,760,000 1,166,410,000 819,858,000 615,289,000 627,814,250 731,806,000 914,376,000 865,075,000  1,168,769,000 1,382,748,000 1,518,282,000  1,388,387,000 1,256,336,000  1,242,666,000 1,151,620,000 987,356,000 
      weighted-average common shares outstanding:
                                                                               
      basic
    52,736,000 52,693,000 52,743,000 52,724,000 52,537,000 52,322,000 52,408,000 52,327,000 52,092,000 51,994,000 51,803,000 51,551,000 51,324,000 51,404,000 51,276,000 51,107,000 51,017,000 51,072,000 50,999,000 50,913,000 50,656,000 50,787,000 50,667,000 50,338,000 50,220,000 50,279,000 50,224,000 50,098,000 49,952,000 50,018 49,946 49,814,000 49,647,000 49,775 49,735 49,282,000 49,150,000 49,185,000 49,131,000 49,079,000 48,981,000 49,070,000 49,028,000 48,747,000 48,562,000 48,588,000 48,543,000 48,440,000 47,851,000 47,959,000 47,684,000 47,559,000 47,470,000 47,556,000 47,434,000 47,330,000 47,226,000 47,291,000 47,183,000 47,100,000 48,111 47,357,000 49,001,000   48,531,000 48,521,000 48,514,000 34,272,000 27,171,000 27,145,000 26,819 26,936,000 26,713,000 26,638,000 
      effect of dilutive stock options and restricted stock units
                                            191,750 705,000 800,000 796,000 57,000 487,000 510,000 490,000 -64,000 666,000 914,000 954,000                        
      diluted
                                            12,429,500 49,775,000 49,828,000 49,543,000 94,000 49,075,000 49,053,000 48,930,000 52,000 48,625,000 48,598,000 48,513,000 30,000 48,217,000 47,434,000 47,330,000 28,000 47,764,000 47,959,000                 
      goodwill and intangible asset impairment
                                                          376,574,000                     
      benefit for income taxes
                                                        -6,463,000 -1,591,000 15,272,000                     
      other expense
                                                                               
      effect of dilutive stock options and restricted stock units outstanding
                                                         661,000   167,500 473,000 776,000                 
      diluted
                                            12,429,500 49,775,000 49,828,000 49,543,000 94,000 49,075,000 49,053,000 48,930,000 52,000 48,625,000 48,598,000 48,513,000 30,000 48,217,000 47,434,000 47,330,000 28,000 47,764,000 47,959,000                 
      effect of dilutive stock options and restricted
                                                                               
      stock units outstanding
                                                               762,000 124,500 539,000 535,000 337,000  552,000 476,000 505,000  596,000 508,000  622,000 668,000 482,000 
      diluted
                                                               47,862,000 12,238,250 47,896,000 49,536,000 49,362,000  49,083,000 48,997,000 49,019,000  27,767,000 27,653,000  27,558,000 27,381,000 27,120,000 
      weighted average common shares outstanding:
                                                                               
      basic
                                                                   49,025,000            
      weighted-average common shares outstanding
                                                                               
      basic
    52,736,000 52,693,000 52,743,000 52,724,000 52,537,000 52,322,000 52,408,000 52,327,000 52,092,000 51,994,000 51,803,000 51,551,000 51,324,000 51,404,000 51,276,000 51,107,000 51,017,000 51,072,000 50,999,000 50,913,000 50,656,000 50,787,000 50,667,000 50,338,000 50,220,000 50,279,000 50,224,000 50,098,000 49,952,000 50,018 49,946 49,814,000 49,647,000 49,775 49,735 49,282,000 49,150,000 49,185,000 49,131,000 49,079,000 48,981,000 49,070,000 49,028,000 48,747,000 48,562,000 48,588,000 48,543,000 48,440,000 47,851,000 47,959,000 47,684,000 47,559,000 47,470,000 47,556,000 47,434,000 47,330,000 47,226,000 47,291,000 47,183,000 47,100,000 48,111 47,357,000 49,001,000   48,531,000 48,521,000 48,514,000 34,272,000 27,171,000 27,145,000 26,819 26,936,000 26,713,000 26,638,000 
      effect of dilutive stock options, warrants and restricted
                                                                               
      less:
                                                                               
      accrued dividends on 21.25 preferred stock
                                                                               
      excess of fair value over carrying value upon redemption
                                                                               
      of 21.25 preferred stock
                                                                               
      net income available for common stockholders
                                                                            24,011,000 27,578,000 22,653,000 
      less: accrued dividends on 21.25 preferred stock
                                                                               
    Balance Sheets:
    Quarterly
    Annual
      Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 2006-09-30 
                                                                                 
        assets
                                                                                 
        current assets:
                                                                                 
        cash and cash equivalents
      802,979,000 734,553,000 695,732,000 526,090,000 276,489,000 455,084,000 287,403,000 267,072,000 358,304,000 290,008,000 263,545,000 282,695,000 259,351,000 323,200,000 309,267,000 316,499,000 202,197,000 187,535,000 231,129,000 318,720,000 374,289,000 348,366,000 182,599,000 198,122,000 193,685,000 207,130,000 149,881,000 101,482,000 116,075,000 118,258,000 138,569,000 174,340,000  221,878,000 172,927,000 104,817,000  170,744,000 93,622,000 90,582,000  96,894,000 106,917,000 145,958,000  137,228,000 139,858,000 133,064,000  127,902,000 142,678,000 132,318,000  180,777,180,777,000 185,386,000 190,414,000  420,978,000 367,106,000  213,077,000 303,212,000 256,927,000  335,739,000 450,921,000 458,621,000 400,689,000 416,654,000 349,749,000  361,840,000 342,971,000 242,257,000 123,817,000 
        restricted cash
      23,811,000 35,641,000 62,352,000 20,990,000 40,296,000 9,104,000 13,994,000 12,417,000 14,749,000 41,915,000 10,914,000 19,946,000 14,480,000 21,817,000 4,485,000 4,870,000 9,199,000 6,922,000 2,884,000 82,086,000 77,563,000 80,974,000 8,892,000 5,956,000 8,416,000 6,261,000 4,742,000 5,095,000 3,788,000 3,436,000 3,434,000 4,090,000 4,780,000 17,424,000 52,051,000 60,158,000 50,504,000 48,725,000 49,452,000 49,158,000 45,853,000 38,572,000 39,493,000 44,093,000 44,370,000 46,988,000 42,627,000 43,269,000 42,594,000 47,466,000 47,019,000 45,231,000 38,717,000 3,870,038,700,000 38,684,000 35,450,000  32,443,000 28,008,000 23,550,000 23,541,000 23,523,000 23,523,000             
        restricted investments
      255,908,000 228,959,000 173,435,000 157,373,000 135,592,000 139,986,000 135,493,000 134,182,000 130,499,000 98,361,000 97,293,000 88,240,000 91,556,000 79,562,000 84,498,000 85,075,000 84,355,000 86,576,000 85,545,000 74,062,000 78,912,000 75,475,000 75,382,000 75,409,000 70,974,000 67,728,000 65,287,000 63,937,000 58,142,000 53,116,000 52,900,000 53,161,000 53,014,000 48,775,000                                          
        accounts receivable
      1,137,800,000 1,218,609,000 1,299,908,000 1,337,652,000 1,298,255,000 986,893,000 1,310,683,000 1,087,369,000 1,057,229,000 1,161,020,000 1,226,636,000 1,140,592,000 1,171,085,000 1,252,943,000 1,337,017,000 1,413,246,000 1,454,319,000 1,426,709,000 1,372,054,000 1,368,892,000 1,415,063,000 1,565,909,000 1,586,560,000 1,501,557,000 1,354,519,000 1,460,450,000 1,469,213,000 1,347,881,000 1,261,072,000 1,325,465,000 1,272,932,000 1,236,818,000  1,857,870,000 1,838,359,000                      6,657,000                   
        retention receivable
      699,946,000 668,894,000 661,907,000 629,735,000 591,623,000 560,163,000 549,736,000 546,668,000 550,224,000 561,856,000 557,358,000 563,967,000 585,556,000 583,789,000 552,695,000 542,301,000                                                            
        costs and estimated earnings in excess of billings
      807,468,000 819,199,000 847,778,000 856,379,000 947,539,000 942,522,000 966,251,000 1,160,710,000 1,156,571,000 1,175,795,000 1,224,663,000 1,299,786,000 1,377,528,000 1,448,341,000 1,372,640,000 1,356,607,000 1,356,768,000 1,388,010,000 1,346,974,000 1,255,992,000 1,236,734,000 1,180,215,000 1,149,103,000 1,155,202,000 1,123,544,000 1,159,333,000 1,165,408,000 1,168,675,000 1,142,295,000 1,085,651,000 1,044,233,000 980,896,000 932,758,000 902,312,000 850,634,000 840,760,000 831,826,000 820,243,000 811,406,000 858,356,000 905,175,000 883,809,000 816,480,000 795,510,000 726,402,000 720,177,000 660,952,000 698,423,000 573,248,000 538,421,000 504,911,000 479,361,000 465,002,000  374,936,000 377,599,000 -80,670,000 215,117,000 172,540,000 139,449,000 123,497,000 120,280,000 134,825,000 145,678,000 131,317,000 122,500,000 140,475,000 106,107,000 73,727,000 93,577,000 74,397,000 83,896,000 77,202,000 98,556,000  
        other current assets
      371,170,000 411,030,000 431,209,000 370,003,000 199,276,000 192,915,000 188,220,000 187,822,000 199,138,000 239,736,000 165,760,000 132,321,000 179,215,000 196,401,000 207,881,000 216,400,000 186,773,000 204,555,000 252,735,000 236,943,000 249,455,000 239,614,000 222,392,000 211,501,000 197,473,000 162,406,000 165,688,000 124,303,000 115,527,000 130,023,000 141,472,000 132,298,000 89,316,000 70,781,000 77,736,000 58,482,000 66,023,000 65,511,000 76,960,000 91,990,000 108,844,000 86,734,000 103,243,000 74,367,000 68,735,000 69,318,000 52,420,000 54,858,000 50,669,000 48,360,000 53,814,000 74,500,000 75,388,000  101,684,000 87,862,000 6,631,000 52,860,000 35,372,000 42,314,000 44,867,000 37,345,000 33,527,000 30,811,000 28,164,000 16,112,000 18,970,000 22,015,000 7,822,000 3,764,000 4,440,000 5,452,000 6,771,000 8,321,000 16,397,000 
        total current assets
      4,099,082,000 4,116,885,000 4,172,321,000 3,898,222,000 3,489,070,000 3,286,667,000 3,451,780,000 3,396,240,000 3,466,714,000 3,568,691,000 3,546,169,000 3,527,547,000 3,678,771,000 3,906,053,000 3,868,483,000 3,934,998,000 3,862,492,000 3,937,431,000 3,975,287,000 3,998,077,000 4,080,457,000 4,111,967,000 3,806,423,000 3,720,898,000 3,510,986,000 3,605,582,000 3,528,642,000 3,301,505,000 3,175,643,000 3,208,886,000 3,144,291,000 3,112,500,000 3,074,392,000 3,119,040,000 2,991,707,000 2,813,819,000 2,837,756,000 2,849,937,000 2,789,881,000 2,732,297,000 2,635,245,000 2,675,747,000 2,637,599,000 2,472,010,000 2,472,556,000 2,562,256,000 2,357,884,000 2,201,199,000 2,085,920,000 2,169,637,000 2,147,385,000 2,072,686,000 1,981,847,000  1,902,385,000 1,877,496,000  1,754,108,000 1,517,980,000 1,561,042,000 1,528,049,000 1,679,044,000 1,566,192,000 1,614,554,000 1,774,838,000 1,963,753,000 2,070,193,000 2,002,246,000 1,604,183,000 1,576,790,000 1,526,082,000 1,446,607,000 1,276,804,000 1,147,032,000 918,670,000 
        property and equipment
      554,766,000  491,035,000 454,554,000 440,626,000  427,053,000 434,371,000 438,605,000 447,303,000 444,615,000 441,606,000  429,911,000 427,894,000 425,966,000  440,982,000 456,693,000 478,338,000  485,861,000 504,722,000 502,611,000  509,986,000 502,675,000 492,929,000  494,498,000 490,614,000 473,178,000  447,588,000 456,001,000 462,695,000  492,328,000 507,395,000 519,890,000  531,438,000 537,833,000 523,622,000  526,981,000 529,545,000 516,683,000  493,326,000 491,457,000 487,385,000   488,491,000 490,011,000  424,869,000 373,450,000                 
        goodwill
      205,143,000 205,143,000 205,143,000 205,143,000 205,143,000 205,143,000 205,143,000 205,143,000 205,143,000 205,143,000 205,143,000 205,143,000 205,143,000 205,143,000 205,143,000 205,143,000 205,143,000 205,143,000 205,143,000 205,143,000 205,143,000 205,143,000 205,143,000 205,143,000 205,143,000 205,143,000 205,143,000 585,006,000 585,006,000 585,006,000 585,006,000 585,006,000 585,006,000 585,006,000 585,006,000 585,006,000 585,006,000 585,006,000 585,006,000 585,006,000 585,006,000 585,006,000 585,006,000 585,006,000 585,006,000 585,006,000 585,006,000 577,756,000 577,756,000 571,932,000 570,646,000 570,646,000 570,646,000  570,646,000 893,790,000  691,077,000 651,429,000 621,920,000 602,471,000 602,471,000 602,471,000 602,471,000 602,471,000 602,471,000 602,471,000 739,192,000 27,268,000 27,268,000 26,268,000 26,268,000 26,268,000 26,268,000 26,268,000 
        intangible assets
      63,273,000 63,832,000 64,391,000 64,950,000 65,509,000 66,069,000 66,628,000 67,187,000 67,746,000 68,865,000 69,424,000 69,983,000 70,542,000 71,102,000 74,891,000 79,563,000 85,068,000 96,469,000 105,801,000 116,472,000 123,115,000 131,391,000 140,674,000 149,458,000 155,270,000 83,254,000 84,140,000 85,026,000 85,911,000 86,797,000 87,683,000 88,568,000 89,454,000 90,340,000 91,226,000 92,111,000 92,997,000 93,883,000 94,768,000 95,654,000 96,540,000 97,425,000 98,368,000 99,311,000 100,254,000 103,329,000 106,403,000 110,071,000 113,740,000 117,010,000 120,281,000 123,551,000 126,821,000  133,715,000 192,960,000  160,206,000 151,081,000 132,551,000 128,105,000 130,051,000 132,089,000 134,327,000 137,342,000 140,887,000 145,798,000 254,473,000        
        deferred income taxes
      82,175,000 96,573,000 102,808,000 117,173,000 133,816,000 143,289,000 111,367,000 67,284,000 69,737,000 72,003,000   4,649,000 13,760,000 6,836,000 69,890,000 70,989,000 83,065,000 85,386,000 82,950,000 82,966,000 58,416,000 41,329,000 37,580,000  58,305,000 56,248,000 106,113,000  106,636,000 106,284,000 106,763,000  132,335,000 131,292,000 130,616,000 131,007,000 26,029,000 19,098,000 26,550,000 26,306,000 18,873,000 17,952,000 17,962,000 17,962,000 7,951,000 7,982,000 8,195,000 8,240,000 9,631,000 9,452,000 9,721,000 10,071,000  2,931,000 1,958,000 10,854,000 11,440,000 3,782,000 79,082,000 1,410,000 1,369,000 1,393,000 78,977,000 7,577,000 7,606,000 10,566,000 1,215,000 3,917,000 5,964,000   3,089,000 3,089,000  
        other assets
      133,140,000 129,994,000 129,556,000 130,035,000 120,134,000 118,554,000 124,530,000 123,523,000 122,462,000 123,722,000 203,164,000 232,499,000 153,256,000 148,765,000 143,272,000 146,488,000 142,550,000 147,725,000 149,176,000 147,977,000 147,685,000 107,894,000 106,641,000 108,296,000 104,693,000 90,943,000 92,896,000 91,804,000 50,523,000 49,981,000 50,171,000 48,877,000 47,772,000 40,811,000 40,926,000 44,852,000 45,235,000 199,812,000 218,535,000 198,635,000 202,125,000    87,897,000    75,614,000    85,718,000    -601,000   13,141,000    19,280,000      27,423,000  6,738,000 7,153,000 7,408,000 9,398,000 
        total assets
      5,137,579,000 5,160,422,000 5,165,254,000 4,870,077,000 4,454,298,000 4,242,710,000 4,386,501,000 4,293,748,000 4,370,407,000 4,485,727,000 4,468,515,000 4,476,778,000 4,542,800,000 4,760,974,000 4,719,683,000 4,792,158,000 4,724,898,000 4,827,750,000 4,892,100,000 4,946,007,000 5,045,617,000 5,042,256,000 4,763,603,000 4,686,406,000 4,485,777,000 4,494,908,000 4,413,496,000 4,556,270,000 4,387,752,000 4,425,168,000 4,357,765,000 4,308,129,000 4,264,123,000 4,282,785,000 4,164,866,000 3,998,483,000 4,038,620,000 4,220,966,000 4,195,585,000 4,131,482,000 4,042,441,000 3,970,255,000 3,943,636,000 3,766,480,000 3,773,315,000 3,835,520,000 3,654,523,000 3,525,349,000 3,397,438,000 3,478,947,000 3,457,484,000 3,387,438,000 3,296,410,000                       
        liabilities and equity
                                                                                 
        current liabilities:
                                                                                 
        current maturities of long-term debt
      8,109,000 14,589,000 20,068,000 26,120,000 13,842,000 24,113,000 25,724,000 18,602,000 21,109,000 28,040,000 20,634,000 66,228,000 70,285,000 26,875,000 30,565,000 23,285,000        184,954,000 124,054,000 10,862,000 14,414,000 11,921,000 16,767,000 20,601,000 28,105,000 27,165,000 30,748,000 30,951,000 30,333,000 27,598,000 85,890,000 108,897,000 120,256,000 99,970,000 88,917,000 85,897,000 86,101,000 87,600,000 81,292,000 65,407,000 68,232,000 122,947,000 114,658,000 107,821,000 108,134,000 67,330,000 67,710,000  65,039,000 60,916,000  32,413,000 14,217,000 21,334,000 21,855,000 31,014,000 29,879,000 31,334,000 28,508,000 22,215,000 18,848,000 21,429,000 9,155,000 5,683,000 7,374,000 7,576,000 9,435,000 6,641,000 16,042,000 
        accounts payable
      679,129,000 724,932,000 647,050,000 716,428,000 757,652,000 631,468,000 651,676,000 622,776,000 600,190,000 558,844,000 487,769,000 471,938,000 495,345,000 589,689,000 555,365,000 559,152,000 512,056,000 656,135,000 692,835,000 716,326,000 794,611,000 811,987,000 770,515,000 744,222,000 682,699,000 670,458,000 685,745,000 597,498,000 621,728,000 611,100,000 625,436,000 659,290,000  949,675,000 899,284,000                      -45,278,000                   
        retention payable
      275,882,000 265,246,000 258,856,000 254,077,000 242,061,000 240,971,000 226,033,000 223,962,000 227,731,000 221,488,000 226,036,000 245,972,000 246,562,000 241,518,000 227,725,000 228,690,000                                                            
        billings in excess of costs and estimated earnings
      1,893,509,000 1,838,610,000 1,904,637,000 1,684,397,000 1,375,597,000 1,216,623,000 1,052,007,000 987,447,000 1,002,268,000 1,028,960,000 1,025,252,000 978,505,000 975,812,000 966,065,000 956,735,000 844,618,000 761,689,000 754,939,000 764,029,000 818,757,000 839,222,000 911,378,000 962,446,000 891,164,000 844,389,000 818,806,000 635,924,000 579,000,000 573,190,000    456,869,000 403,635,000 339,808,000 288,795,000 331,112,000 334,055,000 325,290,000 285,582,000 288,311,000 286,565,000 263,400,000 286,042,000 319,296,000 327,646,000 299,389,000 264,118,000 267,586,000 282,261,000 306,391,000 295,265,000 301,761,000  362,679,000 376,391,000 -25,310,000 295,013,000 235,873,000 199,750,000 225,072,000 259,963,000 209,323,000 187,714,000 232,493,000 210,489,000 207,893,000 243,489,000 194,593,000 186,470,000 183,242,000 163,018,000 169,096,000 162,649,000  
        accrued expenses and other current liabilities
      352,998,000 396,121,000 377,731,000 274,908,000 239,011,000 219,525,000 276,690,000 207,877,000 191,909,000 199,238,000 196,450,000 171,604,000 179,523,000 216,922,000 192,931,000 199,412,000 210,017,000 207,850,000 200,138,000 176,264,000 215,207,000 233,241,000 209,576,000 197,582,000 206,533,000 188,373,000 175,525,000 173,827,000 174,325,000 162,102,000 134,264,000 118,334,000 132,438,000 124,385,000 176,148,000 112,448,000 107,925,000 209,343,000 171,150,000 160,964,000 159,016,000 185,764,000 166,198,000 152,916,000 159,814,000 145,336,000 136,774,000 148,986,000 158,017,000 161,649,000 180,545,000 176,249,000 168,326,000  190,092,000 159,612,000                    
        total current liabilities
      3,209,627,000 3,239,498,000 3,208,342,000 2,955,930,000 2,628,163,000 2,332,700,000 2,232,130,000 2,060,664,000 2,043,207,000 2,036,570,000 1,956,141,000 1,934,247,000 1,967,527,000 2,041,069,000 1,963,321,000 1,855,157,000 1,777,113,000 1,932,989,000 2,025,284,000 2,131,059,000 2,264,363,000 2,352,310,000 2,541,372,000 2,290,455,000 2,109,856,000 1,920,708,000 1,739,492,000 1,583,274,000 1,597,966,000 1,655,520,000 1,598,742,000 1,559,438,000 1,581,846,000 1,508,646,000 1,445,573,000 1,394,772,000 1,518,943,000 1,601,943,000 1,584,889,000 1,552,422,000 1,473,708,000 1,543,443,000 1,478,929,000 1,328,749,000 1,358,576,000 1,402,032,000 1,354,023,000 1,327,689,000 1,298,486,000 1,348,860,000 1,355,582,000 1,244,760,000 1,234,270,000  1,310,750,000 1,281,246,000  1,054,715,000 941,593,000 968,114,000 1,176,833,000 1,334,333,000 1,242,218,000 1,311,436,000 1,491,203,000 1,605,676,000 1,714,967,000 1,747,356,000 1,359,646,000 1,279,768,000 1,232,561,000 1,184,187,000 1,040,961,000 943,589,000 747,107,000 
        long-term debt, less current maturities, net of unamortized discount and debt issuance costs totaling 16,897 and 17,983
      390,787,000                                                                           
        other long-term liabilities
      272,154,000 265,477,000 310,484,000 281,030,000 246,788,000 241,379,000 266,976,000 259,132,000 243,908,000 238,408,000 238,550,000 238,370,000 240,486,000 252,523,000 243,837,000 240,821,000 233,828,000 241,123,000 237,697,000 235,266,000 230,066,000 200,714,000 201,132,000 198,064,000 199,288,000 186,965,000 186,434,000 184,999,000 151,639,000 148,917,000 145,764,000 166,205,000 163,465,000 155,553,000 155,810,000 159,777,000 162,018,000 126,966,000 140,870,000 138,734,000 140,665,000 114,902,000 113,284,000 113,507,000 114,796,000 97,115,000 122,463,000 118,631,000 117,858,000 146,484,000 135,505,000 133,909,000 138,996,000  125,093,000 111,169,000 -12,723,000 48,040,000 45,625,000 44,680,000 50,081,000 50,789,000 52,896,000 57,044,000 56,759,000 61,316,000 90,273,000 121,412,000 41,340,000 40,422,000 39,862,000 41,295,000 39,451,000 37,380,000 41,110,000 
        total liabilities
      3,872,568,000 3,897,760,000 3,911,841,000 3,630,258,000 3,266,701,000 3,084,104,000 3,154,812,000 2,977,631,000 3,067,173,000 3,151,772,000 3,100,314,000 3,087,071,000 3,100,816,000 3,241,611,000 3,151,737,000 3,145,637,000 3,051,178,000 3,197,132,000 3,281,670,000 3,373,926,000 3,502,672,000 3,532,959,000 3,299,462,000 3,243,478,000 3,055,252,000 2,991,360,000 2,923,937,000 2,761,091,000 2,599,863,000 2,691,796,000 2,645,299,000 2,622,525,000 2,559,343,000 2,651,859,000 2,565,002,000 2,438,356,000 2,485,597,000 2,696,922,000 2,702,752,000 2,691,151,000 2,622,214,000 2,553,649,000 2,549,058,000 2,388,016,000 2,407,810,000 2,494,593,000 2,353,056,000 2,258,329,000 2,149,903,000 2,274,976,000 2,276,629,000 2,225,740,000 2,152,546,000                       
        commitments and contingencies
                                                                                 
        equity
                                                                                 
        stockholders' equity:
                                                                                 
        preferred stock - authorized 1,000,000 shares (1 par value), none issued
                                                                                 
        common stock - authorized 112,500,000 shares (1 par value), issued and outstanding 52,614,703 and 52,791,451 shares
      52,615,000                                                                           
        additional paid-in capital
      1,137,499,000 1,148,634,000 1,147,797,000 1,145,283,000 1,142,299,000 1,146,800,000 1,148,196,000 1,148,074,000 1,146,008,000 1,144,783,000 1,143,532,000 1,142,081,000 1,140,933,000 1,139,905,000 1,137,966,000 1,134,688,000 1,133,150,000 1,132,396,000 1,130,368,000 1,127,624,000 1,127,385,000 1,125,455,000 1,124,672,000 1,120,487,000 1,117,972,000 1,113,987,000 1,110,496,000 1,105,184,000 1,102,919,000 1,098,639,000 1,093,874,000 1,087,164,000 1,084,205,000 1,080,371,000 1,075,637,000 1,068,264,000 1,075,600,000 1,072,811,000 1,070,191,000 1,039,070,000 1,035,516,000 1,043,103,000 1,039,425,000 1,033,997,000 1,025,941,000 1,020,806,000 1,016,823,000 1,011,381,000 1,007,918,000 1,008,796,000 1,008,995,000 1,005,534,000 1,002,603,000  998,207,000 996,313,000  992,546,000 989,013,000 985,413,000 982,917,000 1,007,327,000 1,015,757,000 1,012,983,000 1,008,878,000 1,004,763,000 1,002,868,000 1,027,580,000 166,325,000 163,371,000 160,664,000 155,826,000 151,729,000 144,572,000 132,769,000 
        retained earnings
      55,008,000 46,443,000 21,028,000 17,397,000   48,856,000 149,718,000 148,906,000 180,675,000 217,571,000 255,105,000 304,301,000 397,218,000 429,673,000 492,676,000 514,310,000 484,978,000 469,584,000 438,419,000 422,385,000 386,890,000 350,071,000 331,362,000 313,991,000 400,108,000 380,795,000 701,325,000 701,681,000 652,276,000 631,004,000 606,199,000 622,007,000 541,069,000 517,485,000 487,389,000 473,625,000 443,364,000 414,563,000 393,203,000 377,803,000 369,091,000 349,414,000 337,637,000 332,511,000 304,789,000 269,059,000 240,514,000 224,575,000 191,316,000 167,557,000 152,079,000 137,279,000  53,053,000 401,476,000  343,154,000 323,460,000 316,531,000 344,712,000 313,779,000 281,054,000 260,121,000 227,622,000 200,938,000 162,041,000 286,016,000 251,910,000 223,353,000 198,200,000 175,328,000 151,317,000 123,739,000 81,784,000 
        accumulated other comprehensive loss
      -31,023,000 -29,234,000 -29,938,000 -30,244,000 -32,190,000 -33,988,000 -35,984,000 -40,226,000 -40,162,000 -45,979,000 -45,479,000 -45,310,000 -47,037,000 -52,017,000 -48,963,000 -46,745,000 -43,635,000 -47,160,000 -46,526,000 -47,356,000 -46,741,000 -39,816,000 -40,597,000 -43,128,000 -42,100,000 -42,294,000 -42,530,000 -44,200,000 -45,449,000 -44,193,000 -44,805,000 -43,596,000 -42,718,000 -43,298,000 -44,305,000 -45,220,000 -45,413,000 -41,333,000 -41,091,000 -41,015,000 -42,165,000 -44,661,000 -43,331,000 -42,171,000 -41,618,000 -33,314,000       -43,574,000  -42,365,000 -41,770,000  -35,951,000 -35,996,000 -36,040,000 -33,003,000 -33,222,000 -33,166,000 -33,217,000 -34,530,000 -34,594,000 -34,609,000 -17,605,000 -17,517,000 -17,517,000 -17,517,000 -23,692,000 -23,692,000 -23,692,000 -27,451,000 
        total stockholders' equity
      1,214,099,000 1,218,634,000 1,191,630,000 1,185,179,000 1,160,235,000 1,134,723,000 1,213,503,000 1,309,955,000 1,307,036,000 1,331,501,000 1,367,594,000 1,403,521,000 1,449,718,000 1,536,591,000 1,570,034,000 1,631,819,000 1,654,921,000 1,621,286,000 1,604,498,000 1,569,625,000 1,553,856,000 1,523,356,000      1,812,489,000 1,809,177,000 1,756,748,000 1,730,084,000 1,699,680,000 1,713,275,000 1,627,923,000 1,598,577,000 1,560,127,000 1,553,023,000 1,524,044,000   1,420,227,000 1,416,606,000 1,394,578,000 1,378,464,000 1,365,505,000 1,340,927,000       1,143,864,000  1,056,451,000 1,403,387,000  1,347,035,000 1,323,600,000 1,312,994,000 1,341,716,000 1,336,480,000 1,312,693,000 1,288,426,000 1,250,501,000 1,219,638,000 1,178,817,000 1,346,314,000 428,047,000 396,354,000 368,334,000 334,426,000 306,260,000 271,292,000 214,019,000 
        noncontrolling interests
      50,912,000 44,028,000 61,783,000 54,640,000 27,362,000 23,883,000 18,186,000 6,162,000 -3,802,000 2,454,000 607,000 -13,814,000 -7,734,000 -17,228,000 -2,088,000 14,702,000 18,799,000 9,332,000 5,932,000 2,456,000 -10,911,000 -14,059,000 -20,776,000 -16,370,000 -9,617,000 -18,532,000 -9,481,000 -17,310,000 -21,288,000 -23,376,000 -17,618,000 -14,076,000 -8,495,000 3,003,000 1,287,000                                         
        total equity
      1,265,011,000 1,262,662,000 1,253,413,000 1,239,819,000 1,187,597,000 1,158,606,000 1,231,689,000 1,316,117,000 1,303,234,000 1,333,955,000 1,368,201,000 1,389,707,000 1,441,984,000 1,519,363,000 1,567,946,000 1,646,521,000 1,673,720,000 1,630,618,000 1,610,430,000 1,572,081,000 1,542,945,000 1,509,297,000 1,464,141,000 1,442,928,000 1,430,525,000 1,503,548,000 1,489,559,000 1,795,179,000 1,787,889,000 1,733,372,000 1,712,466,000 1,685,604,000 1,704,780,000 1,630,926,000 1,599,864,000                                         
        total liabilities and equity
      5,137,579,000 5,160,422,000 5,165,254,000 4,870,077,000 4,454,298,000 4,242,710,000 4,386,501,000 4,293,748,000 4,370,407,000 4,485,727,000 4,468,515,000 4,476,778,000 4,542,800,000 4,760,974,000 4,719,683,000 4,792,158,000 4,724,898,000 4,827,750,000 4,892,100,000 4,946,007,000 5,045,617,000 5,042,256,000 4,763,603,000 4,686,406,000 4,485,777,000 4,494,908,000 4,413,496,000 4,556,270,000 4,387,752,000 4,425,168,000 4,357,765,000 4,308,129,000 4,264,123,000 4,282,785,000 4,164,866,000                                         
        property and equipment:
                                                                                 
        land
       44,132,000    44,132,000       44,433,000    40,175,000    44,167,000    39,047,000    41,599,000    41,382,000    41,382,000    41,382,000    41,307,000    41,307,000    41,307,000       36,048,000    33,114,000       17,371,000     
        building and improvements
       149,973,000    138,799,000       124,429,000    116,146,000    116,422,000    115,041,000    125,193,000    125,029,000    124,157,000    123,600,000                                   
        construction equipment
       681,300,000    609,495,000       590,089,000    580,909,000    570,675,000    560,547,000    486,034,000    477,988,000    444,153,000    431,080,000    426,379,000    370,452,000    346,326,000       205,038,000    184,579,000       63,918,000     
        other equipment
       242,776,000    196,870,000       181,649,000    175,832,000    192,247,000    183,197,000    181,578,000    182,288,000    181,717,000    181,940,000    159,148,000    151,847,000    128,511,000       112,012,000    112,554,000       17,372,000     
        property and equipment: - sum
       1,118,181,000    989,296,000       940,600,000    913,062,000    923,511,000    897,832,000                                                   
        less accumulated depreciation
       -570,186,000    -566,308,000       -505,512,000    -483,417,000    -434,294,000    -388,147,000    -343,735,000    -359,188,000    -313,783,000                                       
        total property and equipment
       547,995,000    422,988,000       435,088,000    429,645,000    489,217,000    509,685,000    490,669,000    467,499,000    477,626,000    523,525,000    527,602,000    498,125,000    485,095,000       362,437,000    348,821,000       95,437,000     
        long-term debt, less current maturities, net of unamortized discount and debt issuance costs totaling 17,983 and 21,977
       392,785,000                                                                          
        preferred stock – authorized 1,000,000 shares (1 par value), none issued
                                                                                 
        common stock – authorized 112,500,000 shares (1 par value), issued and outstanding 52,791,451 and 52,485,719 shares
       52,791,000                                                                          
        long-term debt, less current maturities, net of unamortized discount and debt issuance costs totaling 19,032 and 21,977
        393,015,000                                                                         
        common stock - authorized 112,500,000 shares (1 par value), issued and outstanding 52,743,248 and 52,485,719 shares
        52,743,000 52,743,000                                                                        
        long-term debt, less current maturities, net of unamortized discount and debt issuance costs totaling 20,047 and 21,977
         393,298,000                                                                        
        long-term debt, less current maturities, net of unamortized discount and debt issuance costs totaling 21,029 and 21,977
          391,750,000                                                                       
        common stock - authorized 112,500,000 shares (1 par value), issued and outstanding 52,702,538 and 52,485,719 shares
          52,703,000                                                                       
        accumulated deficit
          -2,577,000                                                                       
        long-term debt, less current maturities, net of unamortized discount and debt issuance costs totaling 21,977 and 11,000
           510,025,000                                                                      
        common stock – authorized 112,500,000 shares (1 par value), issued and outstanding 52,485,719 and 52,025,497 shares
           52,486,000                                                                      
        retained (deficit) earnings
           -30,575,000                                                                      
        long-term debt, less current maturities, net of unamortized discount and debt issuance costs totaling 30,020 and 11,000
            655,706,000                                                                     
        common stock - authorized 112,500,000 shares (1 par value), issued and outstanding 52,434,803 and 52,025,497 shares
            52,435,000                                                                     
        long-term debt, less current maturities, net of unamortized discount and debt issuance costs totaling 31,387 and 11,000
             657,835,000                                                                    
        common stock - authorized 112,500,000 shares (1 par value), issued and outstanding 52,389,430 and 52,025,497 shares
             52,389,000                                                                    
        long-term debt, less current maturities, net of unamortized discount and debt issuance costs totaling 9,389 and 11,000
              780,058,000                                                                   
        common stock - authorized 112,500,000 shares (1 par value), issued and outstanding 52,284,162 and 52,025,497 shares
              52,284,000                                                                   
        long-term debt, less current maturities, net of unamortized discount and debt issuance costs totaling 11,538 and 13,980
               876,794,000                                                                  
        common stock - authorized 112,500,000 shares (1 par value), issued and outstanding 52,022,169 and 51,521,336 shares
               52,022,000                                                                  
        long-term debt, less current maturities, net of unamortized discount and debt issuance costs totaling 12,330 and 13,980
                905,623,000                                                                 
        common stock - authorized 112,500,000 shares (1 par value), issued and outstanding 51,969,840 and 51,521,336 shares
                51,970,000                                                                 
        long-term debt, less current maturities, net of unamortized discount and debt issuance costs totaling 13,136 and 13,980
                 914,454,000                                                                
        common stock - authorized 112,500,000 shares (1 par value), issued and outstanding 51,644,903 and 51,521,336 shares
                 51,645,000                                                                
        long-term debt, less current maturities, net of unamortized discount and debt issuance costs totaling 13,980 and 17,109
                  888,154,000                                                               
        common stock – authorized 112,500,000 shares (1 par value), issued and outstanding 51,521,336 and 51,095,706 shares
                  51,521,000                                                               
        long-term debt, less current maturities, net of unamortized discount and debt issuance costs totaling 14,784 and 17,109
                   934,259,000                                                              
        common stock - authorized 112,500,000 shares (1 par value), issued and outstanding 51,485,216 and 51,095,706 shares
                   51,485,000                                                              
        long-term debt, less current maturities, net of unamortized discount and debt issuance costs totaling 15,575 and 17,109
                    937,743,000                                                             
        common stock - authorized 112,500,000 shares (1 par value), issued and outstanding 51,357,691 and 51,095,706 shares
                    51,358,000                                                             
        long-term debt, less current maturities, net of unamortized discount and debt issuance costs totaling 16,350 and 17,109
                     979,769,000                                                            
        common stock - authorized 112,500,000 shares (1 par value), issued and outstanding 51,200,161 and 51,095,706 shares
                     51,200,000                                                            
        retainage receivable
                      568,881,000 637,124,000 683,966,000 661,382,000 648,441,000 621,414,000 581,495,000 573,151,000 562,375,000 542,274,000 508,423,000 490,132,000 478,744,000 492,937,000 490,751,000 530,897,000                                            
        short-term debt
                      24,406,000 28,029,000 36,941,000 101,020,000 100,188,000 99,504,000 320,790,000                                                     
        retainage payable
                      268,945,000 286,036,000 331,341,000 318,692,000 315,135,000 296,200,000 278,045,000 272,533,000 252,181,000 232,209,000 227,884,000 221,028,000 211,956,000 213,430,000 236,545,000 246,033,000                                            
        long-term debt, less current maturities, net of unamortized discount and debt issuance costs totaling 17,109 and 20,209
                      969,248,000                                                           
        common stock – authorized 112,500,000 shares (1 par value), issued and outstanding 51,095,706 and 50,827,205 shares
                      51,096,000                                                           
        long-term debt, less current maturities, net of unamortized discount and debt issuance costs totaling 17,921 and 20,209
                       939,955,000                                                          
        common stock - authorized 112,500,000 shares (1 par value), issued and outstanding 51,072,432 and 50,827,205 shares
                       51,072,000                                                          
        long-term debt, less current maturities, net of unamortized discount and debt issuance costs totaling 18,712 and 20,209
                        933,303,000                                                         
        common stock - authorized 112,500,000 shares (1 par value), issued and outstanding 51,072,182 and 50,827,205 shares
                        51,072,000                                                         
        long-term debt, less current maturities, net of unamortized discount and debt issuance costs totaling 19,478 and 20,209
                         924,651,000                                                        
        common stock - authorized 112,500,000 shares (1 par value), issued and outstanding 50,937,607 and 50,827,205 shares
                         50,938,000                                                        
        long-term debt, less current maturities, net of unamortized discount and debt issuance costs totaling 20,209 and 23,343
                          925,277,000                                                       
        common stock – authorized 112,500,000 and 75,000,000 shares (1 par value), issued and outstanding 50,827,205 and 50,278,816 shares
                          50,827,000                                                       
        long-term debt, less current maturities, net of unamortized discount and debt issuance costs totaling 20,934 and 23,343
                           921,519,000                                                      
        common stock - authorized 112,500,000 and 75,000,000 shares (1 par value), issued and outstanding 50,827,205 and 50,278,816 shares
                           50,827,000                                                      
        long-term debt, less current maturities, net of unamortized discount and debt issuance costs totaling 5,190 and 23,343
                            515,629,000                                                     
        stockholders’ equity:
                                                                                 
        common stock - authorized 75,000,000 shares (1 par value), issued and outstanding 50,771,288 and 50,278,816 shares
                            50,771,000                                                     
        total stockholders’ equity
                            1,484,917,000 1,459,298,000 1,440,142,000 1,522,080,000 1,499,040,000                    1,301,467,000 1,267,020,000 1,247,535,000 1,203,971,000 1,180,855,000 1,161,698,000                        
        long-term debt, less current maturities, net of unamortized discount and debt issuance costs totaling 20,259 and 23,343
                             717,379,000                                                    
        common stock - authorized 75,000,000 shares (1 par value), issued and outstanding 50,541,480 and 50,278,816 shares
                             50,577,000                                                    
        long-term debt, less current maturities, net of unamortized discount and debt issuance costs totaling 23,343 and 34,998
                              710,422,000                                                   
        deferred tax liabilities
                              35,686,000    105,521,000    108,504,000                                           
        common stock – authorized 75,000,000 shares (1 par value), issued and outstanding 50,278,816 and 50,025,996 shares
                              50,279,000                                                   
        long-term debt, less current maturities, net of unamortized discounts and debt issuance costs totaling 26,358 and 34,998
                               825,382,000                                                  
        common stock - authorized 75,000,000 shares (1 par value), issued and outstanding 50,278,816 and 50,025,996 shares
                               50,279,000 50,279,000                                                 
        long-term debt, less current maturities, net of unamortized discounts and debt issuance costs totaling 29,305 and 34,998
                                941,763,000                                                 
        long-term debt, less current maturities, net of unamortized discounts and debt issuance costs totaling 32,185 and 34,998
                                 886,705,000                                                
        common stock - authorized 75,000,000 shares (1 par value), issued and outstanding 50,180,225 and 50,025,996 shares
                                 50,180,000                                                
        long-term debt, less current maturities, net of unamortized discounts and debt issuance costs totaling 34,998 and 45,631
                                  744,737,000                                               
        common stock – authorized 75,000,000 shares (1 par value), issued and outstanding 50,025,996 and 49,781,010 shares
                                  50,026,000                                               
        billings in excess of cost and estimated earnings
                                   648,287,000 574,392,000 508,616,000                                            
        long-term debt, less current maturities, net of unamortized discounts and debt issuance costs totaling 37,749 and 45,631
                                   780,723,000                                              
        common stock - authorized 75,000,000 shares (1 par value), issued and outstanding 50,025,996 and 49,781,010 shares
                                   50,026,000                                              
        long-term debt, less current maturities, net of unamortized discounts and debt issuance costs totaling 40,437 and 45,631
                                    794,509,000                                             
        common stock - authorized 75,000,000 shares (1 par value), issued and outstanding 50,010,863 and 49,781,010 shares
                                    50,011,000                                             
        long-term debt, less current maturities, net of unamortized discounts and debt issuance costs totaling 43,064 and 45,631
                                     790,119,000                                            
        common stock - authorized 75,000,000 shares (1 par value), issued and outstanding 49,913,003 and 49,781,010 shares
                                     49,913,000                                            
        cash, including cash equivalents of 1,481 and 15,302
                                      192,868,000                                           
        accounts receivable, including retainage of 535,939 and 569,391
                                      1,801,656,000                                           
        accounts payable, including retainage of 261,820 and 258,294
                                      961,791,000                                           
        long-term debt, less current maturities, net of unamortized discounts and debt issuance costs totaling 45,631 and 56,072
                                      705,528,000                                           
        contingencies and commitments
                                                                                 
        common stock – authorized 75,000,000 shares (1 par value), issued and outstanding 49,781,010 and 49,211,353 shares
                                      49,781,000                                           
        long-term debt, less current maturities, net of unamortized discounts and debt issuance costs totaling 54,699 and 56,072
                                       855,325,000                                          
        common stock - authorized 75,000,000 shares (1 par value), issued and outstanding 49,781,010 and 49,211,353 shares
                                       49,781,000                                          
        long-term debt, less current maturities, net of unamortized discounts and debt issuance costs totaling 57,434 and 56,072
                                        832,327,000                                         
        common stock - authorized 75,000,000 shares (1 par value), issued and outstanding 49,760,256 and 49,211,353 shares
                                        49,760,000                                         
        accounts receivable, including retainage of 594,926 and 569,391
                                         1,749,602,000                                        
        liabilities and stockholders’ equity
                                                                                 
        accounts payable, including retainage of 264,336 and 258,294
                                         965,931,000                                        
        long-term debt, less current maturities, net of unamortized discounts and debt issuance costs totaling 52,293 and 56,072
                                         753,191,000                                        
        common stock - authorized 75,000,000 shares (1 par value), issued and outstanding 49,694,018 and 49,211,353 shares
                                         49,694,000                                        
        total liabilities and stockholders' equity
                                         3,998,483,000 4,038,620,000 4,220,966,000   4,042,441,000 3,970,255,000 3,943,636,000 3,766,480,000 3,773,315,000 3,835,520,000       3,296,410,000                       
        cash, including cash equivalents of 15,302 and 1,696
                                          146,103,000                                       
        accounts receivable, including retainage of 569,391 and 484,255
                                          1,743,300,000                                       
        accounts payable, including retainage of 258,294 and 204,767
                                          994,016,000                                       
        long-term debt, less current maturities, net of unamortized discount and debt issuance cost of 56,072 and 6,697
                                          673,629,000                                       
        common stock – authorized 75,000,000 shares (1 par value), issued and outstanding 49,211,353 and 49,072,710 shares
                                          49,211,000                                       
        accounts receivable, including retainage of 541,921 and 484,255
                                           1,718,685,000                                      
        accounts payable, including retainage of 245,713 and 204,767
                                           949,648,000                                      
        long-term debt, less current maturities
                                           684,202,000 680,265,000 725,763,000 734,531,000 746,283,000 806,652,000 795,742,000 784,067,000 880,121,000 761,034,000 697,823,000 619,226,000 669,710,000 675,642,000 737,083,000 669,380,000  625,297,000 617,095,000  605,969,000 408,179,000  79,396,000               
        common stock - authorized 75,000,000 shares (1 par value), issued and outstanding 49,202,055 and 49,072,710 shares
                                           49,202,000                                      
        accounts receivable, including retainage of 512,808 and 484,255
                                            1,739,343,000                                     
        accounts payable, including retainage of 222,175 and 204,767
                                            968,193,000                                     
        common stock - authorized 75,000,000 shares (1 par value), issued and outstanding 49,169,813 and 49,072,710 shares
                                            49,170,000                                     
        total stockholers' equity
                                            1,492,833,000 1,440,331,000                                    
        total liabilities and stockholers' equity
                                            4,195,585,000 4,131,482,000                                    
        accounts receivable, including retainage of 488,043 and 484,255
                                             1,615,661,000                                    
        other assets:
                                                                                 
        accounts payable, including retainage of 204,386 and 204,767
                                             1,005,906,000                                    
        common stock - authorized 75,000,000 shares (1 par value), issued and outstanding 49,072,710 shares
                                             49,073,000                                    
        cash, including cash equivalents of 1,696 and 12,044
                                              75,452,000                                   
        accounts receivable, including retainage of 484,255 and 382,891
                                              1,473,615,000                                   
        property and equipment, at cost:
                                                                                 
        less - accumulated depreciation
                                              254,477,000                                   
        accounts payable, including retainage
                                              937,464,000 985,217,000 963,230,000 802,191,000  863,643,000 849,628,000 791,638,000  797,129,000 760,512,000 705,916,000   692,940,000 684,327,000  630,178,000 597,659,000  829,809,000 950,492,000 911,184,000  1,096,603,000 1,257,425,000 1,338,988,000 1,327,711,000 1,036,528,000 959,168,000  915,106,000 793,808,000 688,291,000 552,217,000 
        preferred stock– authorized 1,000,000 shares (1 par value), none issued
                                                                                 
        common stock - authorized 75,000,000 shares (1 par value), issued and outstanding - 49,072,710 shares and 48,671,492 shares
                                              49,073,000                                   
        accounts receivable, including retainage
                                               1,550,865,000 1,553,514,000 1,394,120,000  1,580,594,000 1,454,045,000 1,263,390,000  1,397,857,000 1,389,511,000 1,331,555,000   1,198,764,000 1,184,213,000  1,021,270,000 911,172,000  1,121,657,000 1,193,315,000 1,115,997,000  1,272,041,000 1,366,614,000 1,441,561,000 1,463,717,000 1,093,297,000 1,013,399,000  987,049,000 849,860,000 797,898,000 681,846,000 
        other
                                               80,639,000 84,830,000 86,531,000  57,948,000 75,685,000 73,357,000  80,759,000 81,432,000 86,887,000   35,052,000 18,040,000  20,968,000 15,644,000  18,306,000 17,303,000 20,209,000  16,140,000 17,071,000 16,567,000 16,367,000 11,403,000  6,328,000     
        preferred stock, 1 par value:
                                                                                 
        authorized – 1,000,000 shares
                                                                                 
        issued and outstanding – none
                                                                                 
        common stock - 1 par value: 75,000,000 shares authorized; shares issued and outstanding: 49,072,710 shares and 48,671,492 shares
                                               49,073,000                                  
        common stock - 1 par value: 75,000,000 shares authorized; shares issued and outstanding: 49,069,589 shares and 48,671,492 shares
                                                49,070,000                                 
        common stock - 1 par value: 75,000,000 shares authorized; shares issued and outstanding: 49,001,429 shares and 48,671,492 shares
                                                 49,001,000                                
        cash, including cash equivalents of 12,044 and 6,437
                                                  135,583,000                               
        accounts receivable, including retainage of 382,891 and 364,239
                                                  1,479,504,000                               
        long-term investments
                                                     46,283,000 46,283,000 46,283,000 46,283,000 46,283,000 46,283,000  46,283,000 46,283,000  88,129,000 88,129,000 88,129,000 94,023,000 100,316,000 100,826,000 101,201,000 101,201,000 101,201,000 103,429,000 100,286,000 101,720,000       
        buildings and improvements
                                                  120,796,000    118,312,000    115,504,000       89,281,000    85,830,000       35,421,000     
        less – accumulated depreciation
                                                  220,028,000        146,553,000       79,942,000    67,256,000       38,645,000     
        liabilities and stockholders' equity
                                                                                 
        accounts payable, including retainage of 142,586 and 137,944
                                                  798,174,000                               
        common stock
                                                                      48,531,000 48,531,000 48,517,000 50,323,000 27,329,000 27,147,000  26,964,000 26,906,000 26,673,000 26,456,000 
        authorized – 75,000,000 shares
                                                                                 
        issued and outstanding – 48,671,492 shares and 48,421,467 shares
                                                  48,671,000                               
        common stock - 1 par value: 75,000,000 shares authorized; shares issued and outstanding: 48,645,900 shares and 48,421,467 shares
                                                   48,646,000                              
        authorized — 1,000,000 shares
                                                                                 
        issued and outstanding — none
                                                                                 
        common stock - 1 par value: 75,000,000 shares authorized; shares issued and outstanding: 48,571,741 shares and 48,421,467 shares
                                                    48,572,000                             
        total liabilities and stockholders’ equity
                                                    3,654,523,000 3,525,349,000 3,397,438,000 3,478,947,000 3,457,484,000 3,387,438,000                        
        common stock - 1 par value: 75,000,000 shares authorized;
                                                                                 
        shares issued and outstanding: 48,527,960 shares and 48,421,467 shares
                                                     48,528,000                            
        cash, including cash equivalents of 6,437 and 23,140
                                                      119,923,000                           
        accounts receivable, including retainage of 364,239 and 354,269
                                                      1,291,246,000                           
        less — accumulated depreciation
                                                      183,793,000                           
        accounts payable, including retainage of 137,944 and 137,662
                                                      758,225,000                           
        authorized — 1,000,000 shares issued and outstanding — none
                                                                                 
        authorized — 75,000,000 shares issued and outstanding — 48,421,467 shares and 47,556,056 shares
                                                      48,421,000                           
        common stock - 1 par value: 75,000,000 shares authorized; shares issued and outstanding: 48,115,399 shares and 47,556,056 shares
                                                       48,115,000                          
        common stock - 1 par value: 75,000,000 shares authorized; shares issued and outstanding: 47,896,879 shares and 47,556,056 shares
                                                        47,897,000                         
        shares issued and outstanding: 47,575,692 shares and 47,556,056 shares
                                                         47,576,000                        
        cash, including cash equivalents of 23,140 and 19,197
                                                          168,056,000                       
        accounts receivable, including retainage of 354,269 and 358,511
                                                          1,224,613,000                       
        accounts payable, including retainage of 137,662 and 151,907
                                                          696,473,000                       
        issued and outstanding – 47,556,056 shares and 47,329,275 shares
                                                          47,556,000                       
        assets:
                                                                                 
        short-term investments
                                                           3,555,000              8,503,000 8,766,000 110,337,000 8,355,000 8,370,000    
        bonds substituted for retainage
                                                           14,893,000                      
        long-term investments – auction rate securities
                                                           46,283,000                      
        total
                                                           2,842,082,194,771,845,000,000,000                      
        liabilities:
                                                                                 
        interest rate swap contract
                                                           2,214,000                      
        contingent consideration
                                                           46,706,000                      
        shares issued and outstanding: 47,556,056 and 47,329,275, respectively
                                                            47,556,000                     
        common stock - 1 par value: 75,000,000 shares authorized; shares issued and outstanding: 47,367,950 and 47,329,275, respectively
                                                             47,368,000                    
        cash flows from operating activities:
                                                                                 
        net income
                                                              86,148,000                   
        adjustments to reconcile net income to net cash from operating activities:
                                                                                 
        depreciation
                                                              32,193,000                   
        amortization of intangible assets and debt issuance costs
                                                              15,438,000                   
        stock-based compensation expense
                                                              8,818,000                   
        adjustment of investments to fair value
                                                              4,750,000                   
        excess income tax benefit from stock-based compensation
                                                              -18,000                   
        gain on bargain purchase
                                                              -47,000                   
        (gain) loss on sale of assets
                                                              -716,000                   
        cash from changes in other components of working capital:
                                                                                 
        increase in:
                                                                                 
        accrued expenses
                                                              -36,650,000 97,111,000 93,844,000 93,488,000 100,097,000 92,864,000 91,832,000 101,837,000 133,599,000 115,547,000 149,238,000 154,727,000 119,370,000 128,447,000 102,352,000 98,000 65,533,000 82,919,000 53,435,000 
        net cash (used) provided by operating activities
                                                              -30,524,000                   
        cash flows from investing activities:
                                                                                 
        acquisitions, net of cash balance acquired
                                                              -341,898,000                   
        business acquisition related payments
                                                              -3,000,000                   
        acquisition of property and equipment
                                                              -66,747,000                   
        proceeds from sale of property and equipment
                                                              10,049,000                   
        sales of land
                                                                                 
        proceeds from sale of available-for-sale securities
                                                              30,191,000                   
        change in restricted cash
                                                              -6,816,000                   
        investment in other activities
                                                                                 
        net cash used by investing activities
                                                              -378,221,000                   
        cash flows from financing activities:
                                                                                 
        proceeds from issuance of senior unsecured notes, net of debt discount
                                                                                 
        proceeds from other debt
                                                              701,753,000                   
        repayment of other debt
                                                              -554,969,000                   
        purchase of common stock under share repurchase program
                                                                                 
        common stock dividend paid
                                                                                 
        issuance of common stock and effect of cashless exercise
                                                              -191,000                   
        debt issuance costs
                                                              -5,004,000                   
        net cash from financing activities
                                                              141,607,000                   
        net increase in cash and cash equivalents
                                                              -267,138,000                   
        cash and cash equivalents at beginning of year
                                                              471,378,000                   
        cash and cash equivalents at end of year
                                                              204,240,000                   
        supplemental disclosure of cash paid during the year for:
                                                                                 
        interest
                                                              31,379,000                   
        income taxes
                                                              53,055,000                   
        supplemental disclosure of non-cash transactions:
                                                                                 
        grant date fair value of common stock issued for services
                                                              5,608,000                   
        assets acquired through financing arrangements
                                                              1,604,000                   
        shares issued and outstanding: 47,286,104 and 47,089,593, respectively
                                                               47,286,000                  
        common stock - 1 par value: 75,000,000 shares authorized; shares issued and outstanding: 47,122,926 and 47,089,593, respectively
                                                                47,123,000                 
        cash, including cash equivalents of 127,879 and 294,807
                                                                 471,378,000                
        accounts receivable, including retainage of 271,778 and 544,875
                                                                 880,614,000                
        deferred tax asset
                                                                 3,737,000    1,370,000       7,988,000     
        accounts payable, including retainage of 280,867 and 396,928
                                                                 653,542,000                
        long-term debt, less current maturities included above
                                                                 374,350,000  82,939,000 87,733,000 84,771,000 85,883,000 186,436,000 190,641,000 48,996,000 17,512,000 13,635,000 13,358,000 14,944,000 16,116,000 16,414,000 36,727,000 
        issued and outstanding – 47,089,593 shares and 48,538,982 shares
                                                                 47,090,000                
        property and equipment (net of accumulated depreciation
                                                                                 
        of 76,204 in 2010 and 67,256 in 2009)
                                                                  354,995,000               
        shares issued and outstanding: 47,089,593 and 48,538,982, respectively
                                                                  47,090,000               
        of 73,045 in 2010 and 67,256 in 2009)
                                                                   353,506,000              
        shares issued and outstanding: 48,595,682 and 48,538,982, respectively
                                                                   48,596,000              
        property and equipment, (less accumulated depreciation
                                                                                 
        of 72,216 in 2010 and 67,256 in 2009)
                                                                    351,398,000             
        common stock - 1 par value: 75,000,000 shares authorized
                                                                                 
        shares issued and outstanding: 49,048,044 and 48,538,982, respectively
                                                                    49,048,000             
        cash, including cash equivalents of 294,807 and 333,869
                                                                     348,309,000            
        accounts receivable, including retainage of 544,875 and 656,458
                                                                     1,088,386,000            
        accounts payable, including retainage of 396,928 and 486,561
                                                                     990,551,000            
        issued and outstanding – 48,538,982 shares and 48,319,223 shares
                                                                     48,539,000            
        of 62,527 in 2009 and 47,116 in 2008)
                                                                      341,540,000           
        property and equipment, less accumulated depreciation
                                                                                 
        of 57,454 in 2009 and 47,116 in 2008
                                                                       337,987,000          
        of 53,090 in 2009 and 47,116 in 2008
                                                                        333,410,000         
        property and equipment, less accumulated depreciation of 43,561 in 2008 and
                                                                                 
        38,645 in 2007
                                                                         271,464,000 101,971,000 98,698,000      
        total other assets
                                                                         1,110,318,000 140,391,000  32,596,000     
        property and equipment, less accumulated depreciation of 40,946 in 2008 and
                                                                                 
        property and equipment, less accumulated depreciation of 40,474 in 2008 and
                                                                                 
        cash, including cash equivalents of 459,188 and 203,920
                                                                            459,188,000     
        accounts receivable, including retainage of 420,244 and 235,006
                                                                            971,714,000     
        property and equipment, at cost
                                                                                 
        accounts payable, including retainage of 308,631 and 165,048
                                                                            939,593,000     
        stockholders’ equity
                                                                                 
        preferred stock, 1 par value -
                                                                                 
        designated – 100,000 shares
                                                                                 
        stock purchase warrants
                                                                                461,000 
        authorized – 40,000,000 shares
                                                                                 
        issued and outstanding – 26,986,746 shares and 26,554,087 shares
                                                                            26,987,000     
        property and equipment, less accumulated depreciation of 37,436 in 2007 and
                                                                                 
        32,216 in 2006
                                                                             95,239,000 92,563,000 87,967,000  
        series a junior participating preferred stock
                                                                                 
        property and equipment, less accumulated depreciation of 36,073 in 2007 and
                                                                                 
        property and equipment, less accumulated depreciation of 33,921 in 2007 and
                                                                                 
        unbilled work
                                                                                96,610,000 
        property and equipment, less accumulated depreciation of 30,532 in 2006 and
                                                                                 
        24,497 in 2005
                                                                                84,627,000 
        deferred contract revenue
                                                                                120,448,000 
        deferred tax liability
                                                                                4,965,000 
        preferred stock
                                                                                 
      Cashflow Statements:
      Quarterly
      Annual
        Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2008-06-30 2008-03-31 2007-06-30 2007-03-31 
                                                                            
          cash flows from operating activities:
                                                                            
          net income
        39,528,000 34,398,000 18,848,000 47,086,000 42,749,000   15,969,000 27,502,000    -87,669,000 -24,070,000 -62,020,000 -18,813,000 41,193,000 26,241,000 41,611,000 25,105,000 46,017,000 49,323,000 30,859,000 26,138,000 -76,229,000 26,721,000 -315,439,000 4,722,000 55,391,000 25,436,000 27,896,000 -10,942,000 82,847,000 25,300,000 32,633,000 13,764,000 30,261,000 28,801,000 21,360,000 15,400,000 8,712,000 19,677,000 11,777,000 5,126,000 27,722,000 35,730,000 28,545,000 15,939,000 33,259,000 23,759,000 15,478,000 14,800,000 41,635,000 42,591,000 -348,423,000 -1,203,000 24,048,000 35,477,000 19,694,000 6,929,000 18,909,000 30,933,000 32,725,000 20,933,000 53,710,000 25,153,000 50,231,000 22,653,000 
          adjustments to reconcile net income to net cash from operating activities:
                                                                            
          depreciation
        10,912,000 11,569,000 11,653,000 12,342,000 12,014,000 12,130,000 12,951,000 13,447,000 13,023,000 10,672,000 9,787,000 9,849,000 9,750,000 11,744,000 13,611,000 14,733,000 17,182,000 20,729,000 24,590,000 20,231,000 19,124,000 21,575,000 17,181,000 16,999,000 16,934,000 15,341,000 13,712,000 12,831,000 12,800,000 11,531,000 10,092,000 9,301,000 10,581,000 8,819,000 8,877,000 20,110,000                                 
          amortization of intangible assets
        559,000 559,000 559,000 559,000 560,000 559,000 559,000 559,000 559,000 559,000 559,000 559,000 560,000 3,789,000 4,672,000 5,505,000 8,851,000 9,332,000 10,671,000 6,643,000 8,276,000 9,283,000 8,784,000 5,812,000 3,569,000 886,000 885,000 886,000 886,000 886,000 885,000 886,000 886,000 886,000 885,000 886,000                                 
          share-based compensation expense
        30,051,000 29,326,000 58,706,000 55,405,000 6,565,000 1,395,000 16,524,000 16,913,000 5,524,000 3,466,000 2,566,000 3,071,000 1,384,000 2,867,000 1,397,000 3,417,000 3,539,000 3,070,000 2,585,000 2,448,000 1,111,000 2,458,000 4,020,000 4,244,000 4,812,000 4,253,000 4,572,000 5,506,000 5,003,000 5,716,000 5,982,000 6,081,000 5,117,000 5,637,000 6,114,000 4,306,000 3,314,000 3,150,000 3,312,000 3,647,000                             
          change in debt discounts and deferred debt issuance costs
        1,226,000 1,189,000 1,155,000 1,121,000 1,088,000 8,181,000 1,521,000 2,560,000 1,806,000 987,000 1,001,000 1,004,000 946,000 934,000 916,000 901,000 954,000 934,000 1,851,000 2,017,000      3,348,000 3,268,000 3,174,000 3,110,000 3,048,000 2,987,000 2,927,000 2,870,000 2,775,000 8,114,000 3,836,000                                 
          deferred income taxes
        14,881,000 7,593,000 14,365,000 15,999,000 8,904,000 -38,612,000 -45,365,000 2,475,000 3,494,000 7,110,000 18,009,000 -86,265,000 -26,084,000 7,780,000 -61,093,000 -52,000 -14,011,000 -2,089,000 2,118,000 95,000 26,116,000 16,714,000 2,949,000 2,474,000 -23,291,000 2,003,000 -50,463,000 142,000 -682,000 117,000 -70,000 186,000 -23,738,000   -526,000 -1,533,000 -8,265,000 -216,000 -155,000 15,848,000 6,543,000   5,472,000   45,000   152,000 348,000 16,402,000 413,000 -48,114,000 5,693,000 10,442,000 1,687,000 -864,000 -411,000 -767,000 -935,000 -987,000 -1,137,000 997,000 372,000 -699,000 -1,058,000 
          loss on sale of property and equipment
        -159,000 1,733,000 -855,000 -3,025,000 97,000 -439,000 -40,000        -36,000 -132,000 635,000 1,644,000 340,000 20,000     -2,889,000 -320,000 -1,372,000 -107,000 -421,000 -651,000 3,000 1,471,000 1,507,000 -27,000 -218,000 -131,000 153,000   285,000  -508,000 -37,000 -276,000 -125,000 499,000 427,000                     
          changes in other components of working capital
        45,381,000 67,164,000 180,298,000 127,154,000 -43,983,000 416,826,000 123,148,000 1,977,000 47,173,000 108,078,000 40,579,000 148,182,000 51,897,000 69,423,000 156,656,000 112,448,000  -84,131,000 -170,558,000 -108,385,000  -39,315,000 22,413,000 -90,884,000  170,323,000 -23,279,000 -154,192,000 -20,731,000 -22,226,000 -29,615,000 -84,272,000 82,999,000 -10,434,000 -59,246,000 -73,533,000 -71,861,000 51,000,000 -54,602,000 -15,067,000 -64,991,000 15,764,000 -52,469,000 -27,081,000          -50,821,000 -712,000 -52,602,000  -75,654,000 -65,971,000 -66,229,000  -87,920,000 28,125,000 -87,880,000     
          other long-term liabilities
        5,388,000 18,469,000 6,317,000 2,299,000 -6,427,000 10,522,000 3,188,000 398,000 790,000 -824,000 104,000 -2,256,000 3,455,000 2,977,000 5,396,000 2,489,000 3,541,000 4,424,000 1,774,000 5,027,000 453,000 2,604,000 234,000 1,061,000 -2,116,000 770,000 1,032,000 2,177,000 599,000 2,670,000 -6,415,000 1,139,000 6,532,000 -75,000 -977,000 -1,824,000 36,765,000 -4,744,000 250,000 -4,061,000 30,291,000 -1,421,000 -2,339,000 2,381,000 1,818,000 -4,303,000 2,065,000 3,494,000 5,230,000 9,428,000 6,598,000 1,851,000 3,295,000 -4,393,000 -4,220,000 214,000 -5,900,000 -3,500,000 -3,080,000 -243,000 -946,000 -600,000 1,012,000 -4,089,000     
          other
        -904,000 1,669,000 -1,925,000 3,472,000 1,296,000 -4,780,000 -327,000 -1,981,000 -1,370,000 -1,022,000 544,000 1,088,000 1,126,000 -2,849,000 -1,548,000 251,000 1,433,000 -1,470,000 420,000 95,000 768,000 822,000 1,745,000 -2,876,000 345,000 -474,000 520,000 76,000 208,000 1,092,000 -722,000 -180,000 -7,955,000                                    
          net cash from operating activities
        146,863,000 173,669,000 289,121,000 262,412,000 22,863,000 329,574,000 22,557,000 53,139,000 98,274,000 103,161,000 56,322,000 21,328,000 -44,307,000 72,580,000 57,951,000 120,747,000 4,164,000 -21,316,000 -84,598,000 -46,704,000 41,804,000 72,738,000 92,237,000 -34,007,000 25,165,000 222,851,000 13,299,000 -124,785,000 56,163,000 27,619,000 11,023,000 -73,403,000 161,646,000 36,524,000 -1,775,000 -32,845,000 19,170,000 89,590,000 -11,368,000 15,944,000 -6,602,000 52,432,000 -29,434,000 -2,324,000          3,990,000 -6,829,000 -25,038,000  -36,540,000 -39,722,000 -47,654,000  -48,633,000 72,975,000 -60,291,000 72,864,000 25,050,000   
          capital expenditures
        -17,994,000 -74,963,000 -48,951,000 -26,836,000 -30,104,000 -9,143,000 -6,914,000 -10,918,000 -10,434,000 -14,967,000 -12,827,000 -17,796,000 -16,971,000 -13,964,000 -16,817,000 -12,028,000 -11,432,000 -8,302,000 -9,025,000 -9,835,000 -11,385,000 -12,010,000 -19,693,000 -11,693,000 -21,519,000 -23,331,000 -24,934,000 -14,412,000 -12,658,000 -16,108,000 -19,970,000 -1,529,000 -2,511,000 -5,672,000 -5,470,000 -1,592,000 -3,869,000 -4,812,000 -2,547,000 -3,821,000 -5,691,000          -11,949,000 -11,139,000 -10,649,000  -17,523,000 -13,239,000 -8,932,000  -7,626,000 -4,321,000 -4,188,000 -14,297,000 -5,798,000   
          free cash flows
        128,869,000 98,706,000 240,170,000 235,576,000 -7,241,000 320,431,000 15,643,000 42,221,000 87,840,000 88,194,000 43,495,000 3,532,000 -61,278,000 58,616,000 41,134,000 108,719,000 -7,268,000 -29,618,000 -93,623,000 -56,539,000 30,419,000 60,728,000 72,544,000 -45,700,000 3,646,000 199,520,000 -11,635,000 -139,197,000 43,505,000 11,511,000 11,023,000 -93,373,000 161,646,000 34,995,000 -4,286,000 -38,517,000 13,700,000 87,998,000 -15,237,000 11,132,000 -9,149,000 48,611,000 -29,434,000 -8,015,000          -7,959,000 -17,968,000 -35,687,000  -54,063,000 -52,961,000 -56,586,000  -56,259,000 68,654,000 -64,479,000 58,567,000 19,252,000   
          cash flows from investing activities:
                                                                            
          acquisition of property and equipment
        -17,994,000 -74,963,000 -48,951,000 -26,836,000 -30,104,000 -9,143,000 -6,914,000 -10,918,000 -10,434,000 -14,967,000 -12,827,000 -17,796,000 -16,971,000 -13,964,000 -16,817,000 -12,028,000 -11,432,000 -8,302,000 -9,025,000 -9,835,000 -11,385,000 -12,010,000 -19,693,000 -11,693,000 -21,519,000 -23,331,000 -24,934,000 -14,412,000 -12,658,000 -16,108,000                       -7,615,000 -11,949,000 -11,139,000 -10,649,000 -27,053,000 -17,523,000 -13,239,000 -8,932,000 -9,065,000 -7,626,000 -4,321,000 -4,188,000 -14,297,000 -5,798,000 -15,567,000 -8,276,000 
          proceeds from sale of property and equipment
        2,582,000 3,742,000 898,000 3,739,000 496,000 1,811,000 1,507,000 806,000 628,000 2,248,000 218,000 6,540,000 1,861,000 318,000 4,986,000 1,434,000 2,009,000 1,613,000 3,166,000 457,000 1,230,000 12,238,000 499,000 583,000 8,281,000 671,000 3,428,000 201,000 925,000 1,342,000 817,000 3,303,000 1,304,000 104,000 1,077,000 259,000 760,000 47,000 153,000 939,000 2,760,000 1,098,000 324,000 798,000 182,000 3,247,000 489,000 1,417,000 112,000 192,000 2,120,000 239,000 9,000 2,136,000 5,646,000 3,968,000 3,523,000 3,104,000 2,529,000 893,000 -45,000 1,048,000 235,000 573,000 3,670,000 266,000 2,049,000 1,442,000 
          investments in securities
        -38,468,000 -68,507,000 -22,569,000 -30,072,000 -3,658,000 -9,860,000 -3,710,000 -10,028,000 -12,045,000 -3,465,000 -14,135,000 -386,000 -12,803,000 -736,000 -5,752,000 -4,657,000 -5,220,000 -7,445,000 -15,186,000 -2,910,000                                                 
          proceeds from maturities and sales of investments in securities
        10,090,000 13,367,000 7,355,000 9,360,000 9,394,000 3,801,000 5,833,000 6,449,000 11,530,000 1,907,000 4,472,000 4,755,000 1,160,000 3,414,000 4,536,000 383,000 8,328,000 5,946,000 3,627,000 6,870,000 5,303,000 8,916,000 4,774,000 6,211,000 13,042,000 2,947,000 4,807,000 3,324,000 7,020,000 6,320,000 4,975,000 3,007,000                                     
          net cash from investing activities
        -43,790,000 -126,361,000 -63,267,000 -43,809,000 -23,872,000 -13,391,000 -3,284,000 -13,691,000 -10,321,000 -14,277,000 -22,272,000 -6,887,000 -26,753,000 -10,968,000 -13,047,000 -14,868,000 -6,315,000 -8,188,000 -17,418,000 -5,418,000 -13,491,000 -229,000 -18,043,000 -14,595,000 -9,966,000 -24,843,000 -22,002,000 -19,244,000 -11,720,000 -13,738,000 -27,802,000 -16,948,000 -17,560,000 -6,158,000 -2,624,000 -15,067,000 -6,489,000 -818,000 -4,010,000 -7,178,000 -7,068,000             -9,829,000 -7,539,000 8,136,000  -191,230,000 -100,952,000 -81,667,000  -4,000 -11,101,000 -26,478,000     
          cash flows from financing activities:
                                                                            
          proceeds from debt
         128,215,000 60,000,000 144,302,000 44,933,000   164,927,000 278,000,000 259,500,000 195,151,000 86,249,000 127,805,000 284,552,000 292,473,000 140,089,000 233,930,000 74,251,000 118,270,000 430,169,000 404,155,000 348,688,000 282,455,000 -67,000,000 322,139,000 394,000,000 250,983,000 255,500,000 581,677,000 665,000,000 169,927,000 715,000,000 962,480,000 313,977,000 350,803,000 292,000,000 411,307,000 299,785,000 340,486,000 199,229,000 193,290,000 280,200,000 163,729,000 275,526,000 539,446,000 178,038,000 81,995,000 149,735,000 128,536,000 293,014,000 176,846,000 204,997,000 208,082,000 98,500,000  309,607,000 200,000,000 58,175,000        
          repayment of debt
        -9,563,000 -6,759,000 -7,350,000 -115,372,000 -189,493,000 -299,638,000 -41,308,000 -700,631,000 -100,188,000 -187,141,000 -333,231,000 -238,101,000 -198,649,000 -94,216,000 -163,326,000 -275,910,000 -267,616,000 -143,139,000 -291,068,000 -75,939,000 -115,628,000 -247,118,000 -473,226,000 -283,915,000 -287,238,000 -55,880,000 -267,468,000 -259,691,000 -293,554,000 -279,477,000 -578,724,000 -586,559,000 -328,996,000 -694,118,000 -875,469,000 -296,485,000 -388,005,000 -303,025,000 -584,170,000 -287,484,000 -348,258,000 -259,874,000 -184,127,000 -262,112,000 -217,738,000        -140,579,000 -194,626,000 -195,810,000 -95,107,000  -226,438,000 -3,502,000 -33,119,000  -12,622,000       
          cash payments related to share-based compensation
        -7,117,000 -1,636,000 -1,000 -5,151,000 -2,299,000 -1,063,000 -754,000 -1,440,000 -453,000 -161,000 -123,000 -345,000 -380,000 -1,009,000 -362,000 -2,000 -389,000 -1,236,000 300,000 -703,000 -300,000 -694,000 1,000 -2,364,000                                         
          payment of dividends
        -3,291,000                                                                    
          repurchase of common stock
        -20,000,000                                                                    
          distributions paid to noncontrolling interests
        -11,500,000 -23,750,000 -7,500,000 -8,650,000 -11,750,000 -10,900,000 -5,000,000 -7,400,000 -11,250,000 -6,750,000 -8,500,000 -886,000 -22,000,000 -17,000,000 -7,500,000 -5,405,000 -10,000,000   -11,250,000 -6,307,000 -17,410,000 -13,500,000 -25,000,000 -17,500,000 -4,000,000 -6,500,000 -10,000,000 -7,500,000 -5,000,000 -14,999,000                                   
          contributions from noncontrolling interests
        4,994,000 114,000   15,143,000    2,500,000 2,000,000 4,727,000 3,961,000 3,000,000 4,000,000     3,294,000 1,140,000 2,581,000 2,798,000 2,797,000   1,592,000                                   
          net cash from financing activities
        -46,477,000 -35,198,000 -14,850,000 11,692,000 -146,394,000 -153,392,000 2,635,000 -133,012,000 -109,580,000 -31,420,000 -62,232,000 14,369,000 -126,000 -30,347,000 -52,521,000 4,094,000 19,090,000 -10,052,000 -64,777,000 1,076,000 -5,801,000 165,340,000 -86,781,000 50,579,000 -26,489,000 -139,240,000 56,749,000 130,743,000 -46,274,000 -34,190,000 -19,648,000 71,133,000 -173,096,000 18,585,000 72,509,000 6,626,000 -37,322,000 -11,650,000 18,418,000 6,364,000 -7,772,000 -60,653,000 9,322,000 17,315,000  91,522,000 -151,000 61,881,000  -30,350,000 -19,909,000 67,171,000 34,888,000 1,230,000 9,340,000 3,076,000 -158,101,000 80,113,000 194,546,000 25,049,000  -41,498,000       
          net increase in cash, cash equivalents and restricted cash
        56,596,000 12,110,000 211,004,000   162,791,000 21,908,000 -93,564,000 -21,627,000 57,464,000 -28,182,000 28,810,000 -71,186,000 31,265,000 -7,617,000 109,973,000 16,939,000   -51,046,000 22,512,000 237,849,000 -12,587,000 1,977,000 -11,290,000 58,768,000   -1,831,000 -20,309,000                                       
          cash, cash equivalents and restricted cash at beginning of period
        770,194,000  464,188,000  394,680,000 273,831,000  211,396,000  451,852,000  202,101,000  119,863,000  197,648,000                                     
          cash, cash equivalents and restricted cash at end of period
        826,790,000  211,004,000 230,295,000 316,785,000  21,908,000 -93,564,000 373,053,000 57,464,000 -28,182,000 302,641,000  31,265,000 -7,617,000 321,369,000  -39,556,000 -166,793,000 400,806,000  237,849,000 -12,587,000 204,078,000  58,768,000 48,046,000 106,577,000  -20,309,000 -36,427,000 178,430,000                                     
          debt issuance, extinguishment and modification costs
             -14,000 -24,527,000 -552,000 -3,000 -90,000 -407,000         -493,000                                                
          cash, cash equivalents and restricted cash at beginning of year
                                                                            
          cash, cash equivalents and restricted cash at end of year
                                                                            
          net decrease in cash, cash equivalents and restricted cash
            -147,403,000                       -13,286,000    -19,218,000                                     
          net loss
             -76,208,000    -25,826,000 -16,764,000 -48,929,000                                                         
          adjustments to reconcile net loss to net cash from operating activities:
                                                                            
          gain on sale of property and equipment
                -227,000 -39,000 -63,000 -4,975,000            -461,000                                             
          (gain) loss on sale of property and equipment
                                                                            
          goodwill impairment
                                                                          
          gain on remeasurement of investment in joint venture
                                                                            
          changes in other components of working capital, net of balances acquired
                                                                            
          business acquisition, cash balance acquired net of cash paid
                                                                            
          business acquisition related payment
                                                                          
          change in debt discount and deferred debt issuance costs
                             11,914,000 3,560,000 3,486,000             3,844,000 3,776,000                               
          investment in securities
                             -9,373,000 -3,623,000 -9,696,000  -5,130,000 -5,303,000 -8,357,000  -5,292,000                                       
          adjustments to reconcile net income to net cash from (used) in operating activities:
                                                                            
          debt modification costs
                                                                           
          debt issuance and extinguishment costs
                                        2,000                                    
          excess income tax benefit from share-based compensation
                                            -259,000                                
          issuance of convertible notes
                                                                            
          issuance of common stock and effect of cashless exercise
                                     -213,000 -150,000 -2,308,000  -338,000 -10,809,000 -161,000    -32,000 -3,000 -773,000 -79,000        -1,000 -307,000 -147,000 -300,000   -388,000 266,000 -203,000 -450,000    
          acquisition of property and equipment excluding financed purchases
                                       -19,970,000  -1,529,000 -2,511,000 -5,672,000 -5,470,000 -1,592,000 -3,869,000 -4,812,000 -2,547,000 -3,821,000   -37,235,000                        
          investment in securities, restricted
                                       -3,288,000                                     
          investments in securities, restricted
                                                                            
          proceeds from maturities of investments in securities
                                                                            
          change in restricted cash
                                        12,644,000 34,627,000 8,107,000 -9,654,000 -1,779,000 727,000 -294,000 -3,305,000 -7,281,000 921,000 4,600,000 277,000 2,618,000        -17,000 -16,000 -3,234,000 -13,000 380,000 -3,374,000 -3,814,000 -8,000 -9,000        
          net increase in cash and cash equivalents
                                        -29,010,000 48,951,000 68,110,000 -41,286,000 -24,641,000 77,122,000 3,040,000 15,130,000 -21,442,000 -10,023,000 -39,041,000 10,375,000  -2,630,000 6,794,000 13,141,000               46,285,000 -91,382,000 -42,534,000 -109,439,000   
          cash and cash equivalents at beginning of year
                                            75,452,000 135,583,000 119,923,000 168,056,000 204,240,000 471,378,000 348,309,000 459,188,000 459,188,000   
          cash and cash equivalents at end of year
                                                                            
          investments in securities restricted in use
                                         -39,360,000                                   
          proceeds from issuance of convertible notes
                                                                           
          cash and cash equivalents at beginning of period
                                         146,103,000                                 
          cash and cash equivalents at end of period
                                         48,951,000 68,110,000 104,817,000  77,122,000 3,040,000 90,582,000  -10,023,000 -39,041,000 145,958,000  -2,630,000 6,794,000 133,064,000  -14,776,000 10,360,000 132,318,000  -4,609,000 -5,028,000 190,414,000  -147,657,000 53,872,000 367,106,000  -90,135,000 46,285,000 256,927,000 416,654,000 349,749,000   
          other non-cash items
                                          1,518,000 267,000 -1,521,000 -1,553,000 -199,000 1,399,000 2,012,000 -2,433,000 -1,032,000 -2,227,000 1,949,000 -238,000       594,000 -963,000 -514,000 1,031,000  -1,852,000 -1,463,000 64,000       -27,000  
          debt issuance costs
                                          -13,252,000 -57,000 -218,000 -212,000 -8,719,000 -5,937,000            -6,000 -1,983,000 -10,000 -15,000 -2,756,000 -2,208,000 -25,000         
          loss on sale of investments
                                                          2,699,000             
          proceeds from sale of investments
                                                                            
          payments related to business acquisitions
                                                                            
          depreciation and amortization
                                             17,339,000 15,460,000 14,496,000  11,094,000 10,840,000 10,594,000  12,087,000 15,419,000 14,659,000  14,200,000 13,773,000 13,793,000  14,570,000 16,316,000 15,790,000  12,609,000 8,942,000 8,043,000  7,439,000 7,859,000 8,030,000 5,174,000 2,574,000 5,779,000 3,228,000 
          cash flows from operating activities
                                                                            
          amortization of intangible assets and debt issuance costs
                                                                            
          cash flows from investing activities
                                                                            
          proceeds from sale of available-for-sale securities
                                                          16,553,000 22,803,000   148,000 6,393,000 150,000 375,000   116,000 119,000 
          cash flows from financing activities
                                                                            
          business acquisition-related payments
                                                                            
          stock-based compensation expense
                                                 3,740,000 4,165,000 9,159,000 4,239,000 4,456,000 4,491,000 5,429,000 26,000 1,973,000 1,546,000 3,078,000 2,046,000 2,350,000 1,655,000 3,419,000 1,998,000 -265,000 3,470,000 3,615,000 2,584,000 2,691,000 3,568,000 3,909,000     
          excess income tax benefit from stock-based compensation
                                                 -24,000   -131,000    792,000 -2,000       -18,000     -533,000 -449,000 -4,114,000 -1,051,000 
          supplemental disclosure of cash paid for:
                                                                            
          interest
                                                 2,558,000 18,532,000 7,616,000 17,789,000 5,617,000 16,447,000 5,383,000 14,289,000 5,240,000 16,571,000 5,107,000 16,178,000 4,785,000 15,900,000 3,320,000 13,665,000 3,441,000 13,182,000 1,091,000 1,936,000 1,347,000 1,671,000 1,197,000 630,000 355,000 1,168,000 724,000 
          income taxes
                                                 1,848,000 11,660,000 8,057,000 27,758,000 14,068,000 21,965,000 11,703,000 10,449,000 5,757,000 15,594,000 -2,902,000 -1,338,000 1,854,000 15,012,000 781,000 12,830,000 17,869,000 21,060,000 1,296,000 12,716,000 15,399,000 19,940,000 366,000 38,201,000 10,416,000 27,356,000 5,546,000 
          supplemental disclosure of non-cash transactions:
                                                                            
          property and equipment acquired through financing arrangements not included above
                                                    -26,229,000                        
          net cash (used by) provided by investing activities
                                                                            
          acquisition of property and equipment excluding certain financed purchases
                                                   -5,691,000                         
          net cash used by investing activities
                                                   -4,616,000                     -121,378,000 -132,715,000 -13,577,000 -6,631,000 
          goodwill and intangible asset impairment
                                                                          
          adjustment interest rate swap to fair value
                                                                            
          cash from changes in other components of working capital:
                                                                            
          increase in:
                                                                            
          accounts receivable
                                                                            
          costs and estimated earnings in excess of billings
                                                                            
          other current assets
                                                                            
          accounts payable
                                                                            
          billings in excess of costs and estimated earnings
                                                                            
          accrued expenses
                                                                            
          net cash (used) provided by operating activities
                                                                            
          investment in available-for-sale securities
                                                                       -104,750,000 -125,825,000   
          net cash provided (used) by investing activities
                                                    -34,435,000 -12,162,000                       
          business acquisition related payments
                                                            -1,372,000 -7,158,000 -1,744,000 -1,188,000 -3,000,000       
          net cash provided (used) by financing activities
                                                                            
          net increase/(decrease) in cash and cash equivalents
                                                                            
          grant date fair value of common stock issued for services
                                                    487,000 1,294,000 989,000 3,491,000 6,897,000 7,736,000 3,218,000 439,000 3,654,000 1,421,000 547,000 1,022,000 3,322,000 717,000         
          property and equipment acquired through financing arrangements
                                                      4,713,000 22,332,000 16,231,000 253,000    2,050,000  1,604,000  1,300,000 4,754,000     
          adjustment of investments to fair value
                                                                    5,717,000 -157,000 239,000 -57,000 2,667,000 2,683,000   
          gain on bargain purchase
                                                                3,953,000            
          net cash provided (used) by operating activities
                                                                            
          acquisitions, net of cash balance acquired
                                                                -4,025,000 -176,162,000           
          net cash (used) provided by financing activities
                                                                       -4,613,000     
          net decrease in cash and cash equivalents
                                                             -4,609,000 -5,028,000 -13,826,000  -147,657,000 53,872,000 -104,272,000         
          adjustment of interest rate swap to fair value
                                                                            
          investments in available-for-sale securities
                                                               -535,000             
          proceeds from issuance of senior unsecured notes, net of debt discount
                                                                            
          purchase of common stock under share repurchase program
                                                                            
          common stock dividend paid
                                                                            
          assets acquired through financing arrangements
                                                                            
          loss on sale of equipment
                                                             -21,000     -450,000 596,000  -84,000    41,000   
          supplemental disclosure of cash paid during the period for:
                                                                            
          investment in other activities
                                                                     199,000 -431,000 285,000 -1,196,000 -1,279,000 68,000 239,000 
          gain on sale of equipment
                                                               -79,000         -425,000  -161,000 -130,000 
          property and equipment additions accrued in accounts payable
                                                                   3,331,000         
          (gain) loss on sale of assets
                                                                            
          other assets
                                                                            
          sales of land
                                                                            
          proceeds from other debt
                                                                            
          repayment of other debt
                                                                            
          supplemental disclosure of cash paid during the year for:
                                                                            
          (gain) loss on sale of equipment
                                                                            
          common stock repurchased under share repurchase program
                                                                     -28,191,000       
          acquisition of fisk electric company, net of cash balance acquired
                                                                   -70,620,000         
          loss on sale of assets
                                                                            
          decrease in:
                                                                            
          acquisition of superior gunite, net of cash balance acquired
                                                                            
          acquisition of keating building company, net of cash balance acquired
                                                                            
          cash balance recorded in merger with tutor-saliba corporation, net of transaction costs
                                                                            
          proceeds from other long-term debt
                                                                            
          repayment of other long-term debt
                                                                            
          repayment of shareholder notes payable
                                                                            
          common stock issued in merger with tutor-saliba corporation
                                                                            
          loss on land held for sale
                                                                        211,000 79,000 243,000 155,000 
          investment in land held for sale
                                                                         -79,000 -243,000  
          deferred debt costs
                                                                     -297,000 -444,000 -1,164,000 -38,000  -980,000 -974,000 
          increase in restricted cash
                                                                      -23,523,000     
          proceeds from long-term debt
                                                                       4,664,000 9,238,000  5,387,000  
          repayment of long-term debt
                                                                       -7,910,000 -3,303,000 -1,414,000   
          cash from changes in other components of working capital
                                                                        1,542,000 -10,842,000   
          net cash (used by) provided from operating activities
                                                                            
          acquisition of keating building corporation, net of cash balance acquired
                                                                            
          cash balance recorded in acquisition of tutor-saliba corporation, net of transaction costs
                                                                            
          net cash from (used by) financing activities
                                                                        5,980,000    
          common stock issued in acquisition of tutor-saliba corporation
                                                                            
          stock compensation expense
                                                                        5,920,000    
          net cash provided from (used by) financing activities
                                                                            
          increase in other long-term liabilities
                                                                        3,601,000 2,212,000 8,689,000 6,977,000 
          proceeds from exercise of common stock options and stock purchase warrants
                                                                          549,000 201,000 
          net cash used by financing activities
                                                                         -1,774,000 -19,362,000 -25,562,000 
          deferred merger-related costs
                                                                        -4,805,000    
          common stock issued for services
                                                                        12,485,000  5,966,000 934,000 
          restricted stock compensation expense
                                                                         3,227,000 7,361,000 3,681,000 
          issuance of common stock and effect of cashless exercises
                                                                         -809,000   
          common stock issued for compensation and services
                                                                         6,221,000   
          adjustments to reconcile net income to net cash from (used by) operating activities:
                                                                            
          cash from (used by) changes in components of working capital other
                                                                            
          than cash, current maturities of long-term debt and land held for sale
                                                                          83,104,000 14,491,000 
          reduction of long-term debt
                                                                          -28,578,000 -25,687,000 
          redemption of 21.25 preferred stock, including payment of accrued dividends
                                                                            
          issuance of common stock
                                                                          146,000 -153,000 
          net cash from (used by) operating activities
                                                                          150,406,000 48,946,000 
          net increase in cash
                                                                          117,467,000 16,753,000 
          cash at beginning of year
                                                                          225,504,000 225,504,000 
          cash at end of period
                                                                          342,971,000 242,257,000 
          proceeds from land held for sale
                                                                           -155,000 
          preferred stock dividends accrued but not paid
                                                                            
          income tax benefit from stock options exercised
                                                                            
          loss on sale of available-for-sale securities
                                                                            
          cash used by changes in components of working capital other
                                                                            
          than cash, current maturities of long-term debt, deferred tax asset and
                                                                            
          land held for sale
                                                                            
          acquisition of cherry hill construction, inc., net of cash balance acquired
                                                                            
          proceeds from other investing activities
                                                                            
          cash settlement of restricted stock units
                                                                            
          expenditure for stock registration
                                                                            
          net decrease in cash