7Baggers

Patterson-UTI Energy, Inc
(NASDAQ:PTEN) 

PTEN stock logo

Patterson-UTI Energy, Inc., through its subsidiaries, provides onshore contract drilling services to oil and natural gas operators in the United States and Canada. It operates through three segments: Contract Drilling Services, Pressure Pumping Services, and Directional Drilling Services. The Contra...

Founded: 1978
Full Time Employees: 5,800
Sector: Energy
Industry: Oil & Gas Drilling

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At a glance:
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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 2023-12-31 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 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 2006-12-31 2006-09-30 2006-06-30 2006-03-31 2005-12-31 2005-09-30 2005-06-30 2005-03-31 2004-12-31 2004-09-30 2004-06-30 2004-03-31 2003-12-31 
                                                                                              
      operating revenues:
                                                                                              
      drilling services
    351,717,000 360,777,000 380,200,000 403,805,000 412,860,000 408,385,000 421,563,000 440,289,000 457,573,000 463,598,000 488,775,000                                                                                
      completion services
    679,587,000 701,560,000 705,275,000 719,332,000 766,080,000 650,848,000 831,567,000 805,373,000 944,997,000 1,014,357,000 459,574,000                                                                                
      drilling products
    79,797,000 83,774,000 85,880,000 88,390,000 85,663,000 86,522,000 89,102,000 86,054,000 89,973,000 88,109,000 46,570,000                                                                                
      other
    6,230,000 4,702,000 4,599,000 7,793,000 15,934,000 16,380,000 14,990,000 16,478,000 17,817,000 18,253,000 16,533,000 21,128,000 23,245,000 22,823,000 24,924,000 24,451,000 19,811,000 17,115,000 15,598,000 13,182,000 11,919,000 8,871,000 9,843,000 7,971,000 18,971,000 21,492,000 25,743,000 26,401,000 31,219,000 32,349,000 29,036,000 26,488,000 25,961,000 25,522,000 20,934,000 19,031,000 5,273,000 18,081,000 19,000 17,000 16,000 18,000 16,000     3,000  911,000 380,000 381,000 19,000 -27,000 624,000 -144,000 55,000 10,000 375,000 78,000 119,000 418,000 260,000 174,000 75,000 163,000 228,000 12,000 23,000 -279,000 44,000 353,000 384,000 118,000 42,000 109,000 94,000 116,000 88,000 59,000 84,000 1,173,000 346,000 1,408,000 90,000 1,528,235 -153,000 -187,000 -1,188,000  
      total operating revenues
    1,117,331,000 1,150,813,000 1,175,954,000 1,219,320,000 1,280,537,000 1,162,135,000 1,357,222,000 1,348,194,000 1,510,360,000 1,584,317,000 1,011,452,000 758,885,000 791,802,000 788,476,000 727,503,000 622,238,000 509,375,000 466,493,000 357,885,000 291,774,000 240,929,000 220,801,000 207,141,000 250,380,000 445,927,000 492,297,000 598,452,000 675,765,000 704,171,000 795,937,000 867,478,000 854,418,000 809,164,000 787,334,000 684,989,000 579,186,000 305,175,000 246,887,000 206,133,000 193,907,000 268,939,000 338,566,000 422,251,000 472,761,000 657,699,000 901,219,000 845,628,000 757,276,000 678,168,000 658,772,000 730,907,000 659,316,000 667,039,000 652,750,000 643,631,000 681,112,000 745,921,000 724,647,000 673,828,000 600,064,000 567,404,000 505,678,000 378,663,000 306,992,000 271,598,000 148,984,000 176,159,000 160,764,000                       
      yoy
    -12.75% -0.97% -13.36% -9.56% -15.22% -26.65% 34.19% 77.65% 90.75% 100.93% 39.03% 21.96% 55.45% 69.02% 103.28% 113.26% 111.42% 111.27% 72.77% 16.53% -45.97% -55.15% -65.39% -62.95% -36.67% -38.15% -31.01% -20.91% -12.98% 1.09% 26.64% 47.52% 165.15% 218.90% 232.30% 198.69% 13.47% -27.08% -51.18% -58.98% -59.11% -62.43% -50.07% -37.57% -3.02% 36.80% 15.70% 14.86% 1.67% 0.92% 13.56% -3.20% -10.58% -9.92% -4.48% 13.51% 31.46% 43.30% 77.95% 95.47% 108.91% 239.42% 114.96% 90.96%                           
      qoq
    -2.91% -2.14% -3.56% -4.78% 10.19% -14.37% 0.67% -10.74% -4.67% 56.64% 33.28% -4.16% 0.42% 8.38% 16.92% 22.16% 9.19% 30.35% 22.66% 21.10% 9.12% 6.59% -17.27% -43.85% -9.42% -17.74% -11.44% -4.03% -11.53% -8.25% 1.53% 5.59% 2.77% 14.94% 18.27% 89.79% 23.61% 19.77% 6.31% -27.90% -20.57% -19.82% -10.68% -28.12% -27.02% 6.57% 11.67% 11.66% 2.94% -9.87% 10.86% -1.16% 2.19% 1.42% -5.50% -8.69% 2.94% 7.54% 12.29% 5.76% 12.21% 33.54% 23.35% 13.03% 82.30% -15.43% 9.58%                        
      operating costs and expenses:
                                                                                              
      depreciation, depletion, amortization and impairment
    218,394,000 220,942,000 225,598,000 261,858,000 231,866,000 254,599,000 374,680,000 267,638,000 274,956,000 278,787,000 197,635,000 126,814,000 128,180,000 123,304,000 122,150,000 121,553,000 116,938,000 411,194,000 141,065,000 144,037,000 152,882,000 153,709,000 157,319,000 173,085,000 186,797,000 180,011,000 400,764,000 208,688,000 214,410,000 212,390,000 281,652,000 212,384,000 209,892,000 211,154,000 196,642,000 219,328,000 156,217,000 157,225,000 163,464,000 170,975,000 176,770,000 175,302,000 332,151,000 181,924,000 175,382,000 180,157,000 237,825,000 153,426,000 147,322,000 183,118,000 140,734,000 137,182,000 136,435,000 132,791,000 142,393,000 128,477,000 122,953,000 127,602,000 110,713,000 102,749,000 96,215,000                         -88,403,605 30,789,000 30,451,000   
      general and administrative
    68,763,000                                                                                     -22,984,993 8,309,000 7,910,000 6,798,000  
      other operating expense
    -4,664,000 -3,850,000 22,511,000 -7,011,000 2,950,000 -4,765,000 2,908,000                               -4,038,000 -4,118,000 -4,822,000 -1,345,000                                                  
      total operating costs and expenses
    1,131,648,000 1,151,048,000 1,204,008,000 1,248,806,000 1,263,592,000 1,193,470,000 2,347,851,000 1,302,966,000 1,423,361,000 1,472,612,000 1,001,748,000 654,303,000 665,839,000 671,671,000 651,158,000 585,476,000 528,256,000 827,297,000 447,894,000 401,184,000 358,456,000 344,999,000 321,707,000 409,464,000 940,337,000 575,060,000 905,757,000 723,890,000 727,554,000 1,006,727,000 947,759,000 863,422,000 831,266,000 808,981,000 723,005,000 719,422,000 397,814,000 360,113,000 329,542,000 318,239,000 364,198,000 415,362,000 751,766,000 497,525,000 633,596,000 794,386,000 815,337,000 670,050,000 619,392,000 626,670,000 606,356,000 588,710,000 572,107,000 552,541,000 555,037,000 530,218,000 588,257,000 580,747,000 541,534,000 468,204,000 449,857,000 410,850,000 326,154,000 261,235,000 263,767,000 168,480,000 203,444,000 187,906,000                       
      operating income
    -14,317,000 -235,000 -28,054,000 -29,486,000 16,945,000 -31,335,000 -990,629,000 45,228,000 86,999,000 111,705,000 9,704,000 104,582,000 125,963,000 116,805,000 76,345,000 36,762,000 -18,881,000 -360,804,000 -90,009,000 -109,410,000 -117,527,000 -124,198,000 -114,566,000 -159,084,000 -494,410,000 -82,763,000 -307,305,000 -48,125,000 -23,383,000 -210,790,000 -80,281,000 -9,004,000 -22,102,000 -21,647,000 -38,016,000 -140,236,000 -92,639,000 -113,226,000 -123,409,000 -124,332,000 -95,259,000 -76,796,000 -329,515,000 -24,764,000 24,103,000 106,833,000 30,291,000 87,226,000 58,776,000 32,102,000 124,551,000 70,606,000 94,932,000 100,209,000 88,594,000 150,894,000 157,664,000 143,900,000 132,294,000 131,860,000 117,547,000 94,828,000 52,509,000 45,757,000 7,831,000 -19,496,000 -27,285,000 -27,142,000 25,709,000 129,955,000 165,282,000 126,419,000 119,874,000 131,315,000 144,100,000 215,136,000 179,725,000 242,747,000 281,905,000 268,913,000 245,599,000 191,117,000 173,511,000 122,416,000 94,252,000 -110,545,786 47,408,000 30,799,000 32,510,000  
      yoy
    -184.49% -99.25% -97.17% -165.19% -80.52% -128.05% -10308.46% -56.75% -30.93% -4.37% -87.29% 184.48% -767.14% -132.37% -184.82% -133.60% -83.93% 190.51% -21.43% -31.23% -76.23% 50.06% -62.72% 230.56% 2014.40% -60.74% 282.79% 434.48% 5.80% 873.76% 111.18% -93.58% -76.14% -80.88% -69.20% 12.79% -2.75% 47.44% -62.55% 402.07% -495.22% -171.88% -1187.83% -128.39% -58.99% 232.79% -75.68% 23.54% -38.09% -67.96% 40.59% -53.21% -39.79% -30.36% -33.03% 14.44% 34.13% 51.75% 151.95% 188.17% 1401.05% -586.40% -292.45% -268.58% -69.54% -115.00% -116.51% -121.47% -78.55% -1.04% 14.70% -41.24% -33.30% -45.90% -48.88% -20.00% -26.82% 27.01% 62.47% 119.67% 160.58% -272.88% 266.00% 297.47% 189.92%      
      qoq
    5992.34% -99.16% -4.86% -274.01% -154.08% -96.84% -2290.30% -48.01% -22.12% 1051.12% -90.72% -16.97% 7.84% 53.00% 107.67% -294.70% -94.77% 300.85% -17.73% -6.91% -5.37% 8.41% -27.98% -67.82% 497.38% -73.07% 538.56% 105.81% -88.91% 162.57% 791.61% -59.26% 2.10% -43.06% -72.89% 51.38% -18.18% -8.25% -0.74% 30.52% 24.04% -76.69% 1230.62% -202.74% -77.44% 252.69% -65.27% 48.40% 83.09% -74.23% 76.40% -25.62% -5.27% 13.11% -41.29% -4.29% 9.56% 8.77% 0.33% 12.18% 23.96% 80.59% 14.76% 484.31% -140.17% -28.55% 0.53% -205.57% -80.22% -21.37% 30.74% 5.46% -8.71% -8.87% -33.02% 19.70% -25.96% -13.89% 4.83% 9.49% 28.51% 10.15% 41.74% 29.88% -185.26% -333.18% 53.93% -5.26%   
      operating margin %
    -1.28% -0.02% -2.39% -2.42% 1.32% -2.70% -72.99% 3.35% 5.76% 7.05% 0.96% 13.78% 15.91% 14.81% 10.49% 5.91% -3.71% -77.34% -25.15% -37.50% -48.78% -56.25% -55.31% -63.54% -110.87% -16.81% -51.35% -7.12% -3.32% -26.48% -9.25% -1.05% -2.73% -2.75% -5.55% -24.21% -30.36% -45.86% -59.87% -64.12% -35.42% -22.68% -78.04% -5.24% 3.66% 11.85% 3.58% 11.52% 8.67% 4.87% 17.04% 10.71% 14.23% 15.35% 13.76% 22.15% 21.14% 19.86% 19.63% 21.97% 20.72% 18.75% 13.87% 14.90% 2.88% -13.09% -15.49% -16.88% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% -Infinity% Infinity% Infinity% Infinity%  
      other income:
                                                                                              
      interest income
    2,765,000 2,433,000 1,480,000 1,272,000 1,464,000 928,000 745,000 1,867,000 2,189,000 1,539,000 2,131,000 1,212,000 1,240,000 273,000 58,000 14,000 15,000 26,000 37,000 20,000 139,000 25,000 238,000 334,000 657,000 1,532,000 1,693,000 1,756,000 1,032,000 997,000 817,000 2,360,000 1,423,000 717,000 101,000 642,000 406,000 54,000 63,000 100,000 110,000 40,000 323,000 318,000 283,000 361,000 234,000 208,000 176,000 202,000 293,000 250,000 173,000 172,000 149,000 179,000 54,000 52,000 47,000 45,000 43,000 43,000 64,000 1,380,000 187,000 63,000 53,000 204,000 61,000 118,000 601,000 493,000 343,000 438,000 1,091,000 457,000 369,000 346,000 948,000 2,280,000 2,351,000 1,540,000 944,000 634,000 433,000 -686,860 233,000 204,000 251,000  
      interest expense, net of amount capitalized
    -17,485,000 -17,678,000 -17,488,000 -17,645,000 -17,697,000 -17,725,000 -17,990,000 -17,913,000 -18,335,000 -18,681,000 -15,625,000 -9,738,000 -8,826,000 -8,058,000 -10,975,000 -10,658,000 -10,565,000 -10,582,000 -10,683,000 -10,704,000 -10,009,000 -7,274,000 -11,288,000 -10,984,000 -11,224,000 -28,183,000 -20,739,000 -13,298,000 -12,984,000 -12,910,000 -12,376,000 -12,667,000 -13,625,000 -10,543,000 -9,584,000 -9,075,000 -8,270,000 -8,644,000 -10,244,000 -10,678,000 -10,800,000 -9,431,000 -9,254,000 -9,249,000 -8,541,000 -8,395,000 -6,993,000 -7,249,000                                           
      other income
    965,000 354,000 1,020,000 -1,644,000 1,968,000 -1,333,000 -716,000 224,000                                                                                   
      total other income
    -13,755,000 -14,891,000 -14,988,000                                                     -5,016,000    -3,391,000 -3,727,000 -3,300,000 -5,903,000 171,000 -1,139,000 -1,188,000 -1,167,000 -623,000                       
      income before income taxes
    -28,072,000 -15,126,000 -43,042,000 -47,503,000 2,680,000 -49,465,000 -1,008,590,000 29,406,000 71,703,000 53,458,500 -4,408,000 98,379,000 119,863,000 14,867,750 63,654,000 23,666,000 -27,849,000 -86,826,500 -100,641,000 -119,282,000 -127,383,000 -131,373,000 -125,104,000 -169,649,000 -504,892,000 -109,353,000 -326,232,000 -59,575,000 -35,218,000 -222,619,000 -91,559,000 -19,095,000 -34,135,000 -31,356,000 -47,421,000 -148,538,000 -100,486,000 -121,799,000 -133,571,000 -134,893,000 -105,933,000 -86,169,000 -338,430,000 -33,695,000 15,845,000 98,799,000 23,532,000 80,188,000 51,764,000 67,593,750 117,721,000 64,296,000 88,358,000        113,820,000 24,806,500 46,606,000 45,928,000 6,692,000 -20,684,000 -28,452,000 -27,765,000 25,346,000 103,332,000 165,802,000 127,202,000 120,324,000         98,012,500 174,418,000 123,009,000 94,623,000      
      income tax expense
    -3,596,000 -5,929,000 -6,592,000 1,194,000 1,390,000 1,927,000 -30,256,000 17,785,000 19,997,000 31,332,000 -4,130,000 13,765,000 20,185,000 8,294,000 2,202,000 1,780,000 928,000            -6,604,000    282,000                                                          
      net income
    -24,476,000 -9,197,000 -36,450,000 -48,697,000 1,290,000 -51,392,000 -978,334,000 11,621,000 51,706,000 61,938,000 -278,000 84,614,000 99,678,000 100,097,000 61,452,000 21,886,000 -28,777,000 -361,825,000 -82,998,000 -103,309,000 -106,413,000 -106,527,000 -112,111,000 -150,332,000 -434,722,000 -85,923,000 -261,719,000 -49,447,000 -28,614,000 -201,249,000 -75,042,000 -10,713,000 -34,417,000 195,402,000 -33,769,000 -92,184,000 -63,539,000 -78,122,000 -84,143,000 -85,866,000 -70,503,000 -58,658,000 -225,978,000 -18,975,000 9,125,000 57,583,000 15,976,000 54,283,000 34,822,000 16,591,000 74,420,000 40,768,000 56,230,000 58,859,000 50,806,000 92,538,000 97,274,000 87,595,000 81,928,000 81,638,000 71,252,000 53,854,000 29,374,000 29,528,000 4,186,000 -18,170,000 -18,580,000 -17,743,000 16,203,000 79,492,000 108,746,000 81,422,000 77,409,000 85,106,000 98,181,000 139,551,000 115,801,000 156,318,000 185,990,000 171,690,000 159,256,000 125,192,000 110,135,000 77,665,000 59,748,000 -70,144,267 29,964,000 19,607,000 20,682,000  
      yoy
    -1997.36% -82.10% -96.27% -519.04% -97.51% -182.97% 351818.71% -86.27% -48.13% -38.12% -100.45% 286.61% -446.38% -127.66% -174.04% -121.18% -72.96% 239.66% -25.97% -31.28% -75.52% 23.98% -57.16% 204.03% 1419.26% -57.31% 248.76% 361.56% -16.86% -202.99% 122.22% -88.38% -45.83% -350.12% -59.87% 7.36% -9.88% 33.18% -62.76% 352.52% -872.64% -201.87% -1514.48% -134.96% -73.80% 247.07% -78.53% 33.15% -38.07% -71.81% 46.48% -55.94% -42.19% -32.81% -37.99% 13.35% 36.52% 62.65% 178.91% 176.48% 1602.15% -396.39% -258.09% -266.42% -74.17% -122.86% -117.09% -121.79% -79.07% -6.60% 10.76% -41.65% -33.15% -45.56% -47.21% -18.72% -27.29% 24.86% 68.87% 121.06% 166.55% -278.48% 267.56% 296.11% 188.89%      
      qoq
    166.13% -74.77% -25.15% -3874.96% -102.51% -94.75% -8518.67% -77.52% -16.52% -22379.86% -100.33% -15.11% -0.42% 62.89% 180.78% -176.05% -92.05% 335.94% -19.66% -2.92% -0.11% -4.98% -25.42% -65.42% 405.94% -67.17% 429.29% 72.81% -85.78% 168.18% 600.48% -68.87% -117.61% -678.64% -63.37% 45.08% -18.67% -7.16% -2.01% 21.79% 20.19% -74.04% 1090.92% -307.95% -84.15% 260.43% -70.57% 55.89% 109.88% -77.71% 82.55% -27.50% -4.47% 15.85% -45.10% -4.87% 11.05% 6.92% 0.36% 14.58% 32.31% 83.34% -0.52% 605.40% -123.04% -2.21% 4.72% -209.50% -79.62% -26.90% 33.56% 5.18% -9.04% -13.32% -29.65% 20.51% -25.92% -15.95% 8.33% 7.81% 27.21% 13.67% 41.81% 29.99% -185.18% -334.10% 52.82% -5.20%   
      net income margin %
    -2.19% -0.80% -3.10% -3.99% 0.10% -4.42% -72.08% 0.86% 3.42% 3.91% -0.03% 11.15% 12.59% 12.69% 8.45% 3.52% -5.65% -77.56% -23.19% -35.41% -44.17% -48.25% -54.12% -60.04% -97.49% -17.45% -43.73% -7.32% -4.06% -25.28% -8.65% -1.25% -4.25% 24.82% -4.93% -15.92% -20.82% -31.64% -40.82% -44.28% -26.22% -17.33% -53.52% -4.01% 1.39% 6.39% 1.89% 7.17% 5.13% 2.52% 10.18% 6.18% 8.43% 9.02% 7.89% 13.59% 13.04% 12.09% 12.16% 13.60% 12.56% 10.65% 7.76% 9.62% 1.54% -12.20% -10.55% -11.04% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% -Infinity% Infinity% Infinity% Infinity%  
      net income attributable to noncontrolling interest
    151,000 -103,000 -48,000 447,000 285,000 190,000 427,000 544,000 471,000                                                                                  
      net income attributable to common stockholders
    -24,627,000 -9,094,000 -36,402,000 -49,144,000 1,005,000 -51,582,000 -978,761,000 11,077,000 51,235,000 61,950,000 50,000                                                                                
      net income attributable to common stockholder per common share:
                                                                                              
      basic
    -60 -20 -100 -130  -150 -2,500 30 130 197.5                                                                                 
      diluted
    -60 -20 -100 -130  -150 -2,500 30 130 197.5                                                                                 
      weighted-average number of common shares outstanding:
                                                                                              
      basic
    379,587,000 383,465,000 382,819,000 385,365,000 386,521,000 397,196,000 391,732,000 399,558,000 408,182,000 279,501,000 280,218,000 207,839,000 212,089,000 215,935,000 216,822,000 216,165,000 215,267,000 195,021,000 188,965,000 188,408,000 187,677,000 188,013,000 187,280,000 186,633,000 190,674,000 203,039,000 199,343,000 207,499,000 211,868,000 218,643,000 218,059,000 220,093,000 220,783,000 198,447,000 211,875,000 201,204,000 160,062,000 146,178,000 146,326,000 145,944,000 145,770,000 145,416,000 145,662,000 145,300,000 144,983,000 144,066,000 144,798,000 143,622,000 142,892,000 144,356,000 144,446,000 145,465,000 144,827,000 151,144,000 149,846,000 153,269,000 154,625,000 153,871,000 152,617,000 153,556,000 153,122,000 152,772,000 152,933,000 152,650,000 152,458,000 152,069,000 152,242,000 151,941,000 151,735,000 153,379,000 154,266,000 153,978,000 152,600,000 154,755,000 154,934,000 155,527,000 155,387,000 165,159,000 163,412,000 168,894,000 171,818,000  171,613,000 169,992,000 168,757,000  167,006,000 166,681,000   
      diluted
    379,587,000 383,465,000 382,819,000 385,365,000 387,044,000 397,196,000 391,732,000 399,558,000 409,819,000 280,061,000 281,984,000 208,984,000 215,866,000 219,496,000 220,454,000 219,676,000 215,267,000 195,021,000 188,965,000 188,408,000 187,677,000 188,013,000 187,280,000 186,633,000 190,674,000 203,039,000 199,343,000 207,499,000 211,868,000 218,643,000 218,059,000 220,093,000 220,783,000 199,882,000 211,875,000 201,204,000 160,062,000 146,178,000 146,326,000 145,944,000 145,770,000 145,416,000 145,662,000 145,984,000 145,745,000 145,376,000 146,991,000 146,029,000 145,099,000 145,303,000 145,432,000 146,374,000 146,783,000 151,699,000 150,522,000 153,655,000 155,401,000 155,304,000 154,120,000 155,581,000 154,653,000 153,276,000 154,109,000 152,871,000 153,122,000 152,069,000 152,242,000 151,941,000 151,829,000 154,717,000 155,919,000 156,437,000 155,055,000 156,997,000 157,339,000 157,912,000 157,742,000 167,413,000 165,742,000 171,522,000 174,313,000  174,587,000 173,162,000 171,742,000  169,664,000 169,062,000   
      cash dividends per common share
    100 60 80 80 80 60 80 80 80 60 80 80 80 30 40 40 40 15 20 20 20 20 20 20 40 30 40 40 40 25 40 40 20 20 20 20 20 20 20 20 100 100 100 100 100 100 100 100 100 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 160 160 160 120 120 120                
      impairment of goodwill
          885,240,000                  395,060,000  17,800,000                124,561,000                                                
      selling, general and administrative
     62,058,000 61,976,000 64,108,000 66,930,000 73,079,000 65,696,000 64,578,000 64,984,000 61,037,000 45,102,000 33,257,000 30,566,000 34,577,000 28,472,000 26,079,000 27,461,000 24,206,000 22,063,000 23,555,000 22,558,000 20,919,000 22,355,000 23,991,000 30,346,000 31,833,000 34,231,000 34,894,000 32,555,000 32,771,000 32,820,000 35,663,000 32,817,000 35,966,000 27,551,000 23,478,000 18,852,000 17,534,000 16,612,000 17,087,000 17,972,000 16,578,000 18,582,000 19,216,000 32,797,000 22,028,000 18,896,000 19,548,000 19,673,000 18,556,000 19,580,000 18,319,000 17,397,000 16,664,000 17,222,000 16,719,000 13,868,000 15,590,000 15,957,000 16,749,000 15,975,000 15,551,000 13,685,000 12,343,000 11,463,000 8,530,000 15,871,000 16,236,000 15,984,000 15,978,000 17,469,000 17,747,000 16,996,000 17,039,000 16,593,000 16,322,000 14,669,000 15,637,000 13,777,000 12,840,000 12,811,000 8,935,000 10,571,000 9,925,000 9,679,000      
      merger and integration expense
     6,000 90,000 488,000 432,000 3,460,000 6,699,000 10,645,000 12,233,000 19,532,000 70,188,000                                                                                
      total other expense
       -18,017,000 -14,265,000 -12,269,750 -17,961,000 -15,822,000 -15,296,000 -18,435,000 -14,112,000 -6,203,000 -6,100,000 -8,414,000 -12,691,000 -13,096,000 -8,968,000 -11,671,000 -10,632,000 -9,872,000 -9,856,000 -7,175,000 -10,538,000 -10,565,000 -10,482,000 -26,590,000 -18,927,000 -11,450,000 -11,835,000 -11,829,000 -11,278,000 -10,091,000 -12,033,000 -9,709,000 -9,405,000 -8,302,000 -7,847,000 -8,573,000 -10,162,000 -10,561,000 -10,674,000 -9,373,000 -8,915,000 -8,931,000 -8,258,000 -8,034,000 -6,759,000 -7,038,000 -7,012,000 -6,036,000 -6,830,000 -6,310,000 -6,574,000 -5,765,000 -6,434,000  -4,473,000 -4,352,000 -3,413,000                                
      credit loss expense
         1,419,750 721,000 -273,000 5,231,000               4,551,000 1,055,000                                                                  
      other operating income
           -10,786,000 -11,182,000 -2,498,500 -2,635,000 -1,793,000 -5,566,000 -2,641,250 -109,000 -9,238,000             -8,736,000 -7,248,000 -771,000 -7,129,000 -2,421,000 -4,625,250 -3,791,000 -1,806,000 -12,904,000                                                      
      net loss attributable to noncontrolling interest
             -12,000 -328,000                                                                                
      contract drilling
               432,375,000 419,026,000 399,402,000 356,044,000 304,586,000 256,640,000 230,872,000 157,925,000 141,732,000 133,501,000 115,574,000 115,054,000 171,134,000 267,364,000 270,785,000 317,035,000 348,138,000 372,392,000 387,487,000 365,280,000 349,922,000 327,803,000 309,580,000 301,614,000 270,111,000 158,728,000 136,085,000 123,684,000 115,235,000 168,659,000 202,276,000 261,817,000 288,321,000 401,478,000 492,132,000 482,212,000 438,583,000 425,903,000 412,667,000 457,871,000 389,979,000 419,094,000 425,247,000 446,735,000 460,249,000 489,482,000 468,917,000 436,827,000 386,479,000 377,358,000 340,428,000 290,759,000 239,966,000 210,745,000 159,573,000 112,294,000 101,716,000 225,704,000 468,532,000 498,510,000 416,835,000 420,149,000 426,642,000 428,316,000 419,191,000 467,498,000 553,270,000 577,047,000 530,349,000 508,704,000 459,746,000 401,046,000 329,503,000 295,389,000      
      pressure pumping
               250,241,000 293,268,000 306,783,000 287,664,000 238,376,000 189,590,000 183,292,000 152,634,000 111,991,000 75,839,000 79,498,000 71,973,000 59,533,000 125,107,000 161,448,000 208,637,000 251,008,000 247,601,000 319,703,000 421,606,000 425,303,000 406,784,000 406,652,000 362,441,000 290,044,000 141,174,000 105,642,000 78,165,000 73,950,000 96,313,000 131,702,000 154,407,000 176,624,000 249,721,000 397,735,000 348,692,000 306,577,000 240,261,000 234,177,000 259,209,000 254,620,000 231,160,000 211,913,000 181,963,000 206,173,000 241,722,000 240,849,000 225,164,000 200,131,000 179,659,000 156,389,000 81,104,000 59,364,000 53,751,000 48,033,000 41,687,000 33,616,000 38,105,000 56,918,000 60,618,000 57,094,000 42,864,000 54,138,000 58,498,000 51,592,000 38,584,000 37,871,000 40,462,000 36,010,000 31,328,000 26,786,000 27,640,000 22,025,000 16,693,000 -48,423,346 19,663,000 14,577,000 14,250,000  
      directional drilling
               55,141,000 56,263,000 59,468,000 58,871,000 54,825,000 43,334,000 35,214,000 31,728,000 24,869,000 19,670,000 16,858,000 10,271,000 11,742,000 34,485,000 38,572,000 47,037,000 50,218,000 52,959,000 56,398,000 51,556,000 52,705,000 48,616,000                                                          
      merger and integration expenses
               7,940,000   24,000 182,000 1,863,000 9,994,000 918,000 1,148,000            747,000 1,991,000 8,653,000 9,449,000 51,193,000                                                       
      net income per common share:
                                                                                              
      basic
               410 470 62.5 280 100                         -480 -390 -1,540 -130 60 400 110 370 240 292.5 510 280 380             -32.5 -120 -120 110 520 700 530 510 550 630 900 750 770 1,140 1,020 930 365 640 460 350      
      diluted
               400 460 62.5 280 100                         -480 -390 -1,540 -130 60 400 110 370 240 290 510 280 380             -32.5 -120 -120 110 520 700 520 500 550 620 880 730 757.5 1,120 1,000 910 357.5 630 450 350      
      other operating expenses
                    -1,218,000 -935,750 -1,219,000 -2,789,000 265,000                                             -2,890,000 700,000 2,000,000 4,000,000 2,500,000 1,250,000 300,000 300,000 950,000 600,000 400,000 802,000 5,456,000 2,563,000 1,056,000           
      net loss per common share:
                                                                                              
      basic
                    -130 -387.5 -440 -550 -570 -570 -600 -810 -2,280 -412.5 -1,310 -240 -140 -137.5 -340 -50 -160 -247.5 -160 -460 -400 -412.5 -580 -580                                                   
      diluted
                    -130 -387.5 -440 -550 -570 -570 -600 -810 -2,280 -412.5 -1,310 -240 -140 -137.5 -340 -50 -160 -247.5 -160 -460 -400 -412.5 -580 -580                                                   
      restructuring expenses
                           38,338,000                                                                   
      income tax benefit
                     -8,116,000 -17,643,000 -15,973,000 -20,970,000 -24,846,000 -12,993,000 -19,317,000 -70,170,000 -23,430,000 -64,513,000 -10,128,000  -21,370,000 -16,517,000 -8,382,000  -226,758,000 -13,652,000 -56,354,000 -36,947,000 -33,471,250 -49,428,000                                                    
      other operating expenses (income)
                         1,079,000 776,000 4,753,000 451,000 20,750 -252,000 9,071,000                                                               
      provision for bad debts
                             2,089,000  3,594,000                          -500,000   1,600,000     -500,000 -500,000                            
      acquisition related expenses
                                        5,156,000                                                      
      oil and natural gas
                                         3,243,250 4,284,000 4,722,000 3,967,000 4,588,000 6,027,000 7,816,000 6,500,000 11,352,000 14,724,000 12,116,000 12,004,000 11,928,000 13,827,000 14,717,000 16,785,000 15,590,000 14,933,000 14,690,000 14,717,000 14,881,000 11,837,000 13,454,000 10,387,000 8,861,000 6,800,000 7,662,000 7,102,000 5,963,000 5,690,000 5,165,000 4,400,000 6,090,000 13,670,000 13,609,000 8,991,000 9,430,000 9,840,000 12,108,000 10,259,000 10,104,000 9,986,000 10,577,000 8,520,000 11,470,000 10,234,000 8,807,000 9,105,000 -25,070,133 9,602,000 8,287,000 7,215,000  
      income tax expense:
                                                                                              
      current
                                           -2,000,000 -23,814,000 -37,869,000 -42,446,000 1,705,000 30,520,000 -53,287,000 48,618,000 25,680,000 26,935,000 22,039,000 25,916,000 2,335,000 7,573,000 6,880,000 2,199,000 -829,000 7,510,000 3,145,000 6,795,000 15,449,000 3,582,000 -70,404,000 -1,748,000 1,935,000 -4,417,000 -112,555,000 -3,659,000 -2,862,000 38,000 27,612,000 44,287,000 29,229,000 28,712,000 43,924,000 40,190,000 56,350,000 53,433,000 86,897,000 106,151,000 98,394,000 83,931,000 50,692,000 66,147,000 44,983,000 33,096,000 -31,160,312 11,996,000 14,655,000 4,549,000  
      deferred
                                           -47,027,000 -11,616,000 10,358,000 -70,006,000 -16,425,000 -23,800,000 94,503,000 -41,062,000 225,000 -9,993,000 -12,564,000 17,385,000 21,193,000 24,555,000 28,705,000 29,155,000 54,169,000 48,407,000 48,808,000 40,158,000 31,382,000 38,619,000 107,122,000 18,980,000 14,465,000 6,923,000 105,711,000 -6,213,000 -7,160,000 9,105,000 22,516,000 12,769,000 16,551,000 14,203,000 2,605,000 6,505,000 18,970,000 10,191,000 -1,132,000 -9,563,000 1,113,000 5,476,000 16,825,000 -1,864,000 361,000 1,779,000 -10,036,527 5,662,000 -3,141,000 7,539,000  
      total income tax benefit
                                           -49,027,000                        16,400,000  -6,844,000 -9,872,000 -10,022,000                       
      total income tax expense
                                            -35,430,000 -27,511,000 -112,452,000 -14,720,000 6,720,000 41,216,000 7,556,000 25,905,000 16,942,000 9,475,000 43,301,000 23,528,000 32,128,000 35,585,000 31,354,000 53,340,000 55,917,000 51,953,000 46,953,000 46,831,000 42,201,000 36,718,000 17,232,000  2,506,000                          
      net gain on asset disposals
                                             -3,337,000 -1,362,000 -2,998,000 -2,916,000 -7,076,000 -3,870,000 -3,091,000  -1,098,000 -1,378,000 -1,033,000  -1,111,000 -1,963,000 -28,332,000 -2,400,000 -1,014,500 -1,437,000 -1,017,000  -5,485,000 -250,000                            
      net loss on asset disposals
                                                    -1,744,000    125,000        -1,604,000                              
      interest expense, net of capitalized interest of 1,667 in 2014 and 2,281 in 2013
                                                    -7,188,000                                          
      interest expense
                                                     -7,149,000 -7,503,000 -6,941,000 -6,766,000 -5,910,000 -7,207,000 -5,051,000 -4,582,000 -4,414,000 -3,835,000 -3,514,000 -3,889,000 -3,761,000 -6,227,000 -1,383,000 -1,401,000 -1,414,000 -1,448,000 -839,000 -447,000 -174,000 -125,000 -63,000 -277,000 -236,000 -357,000 -831,000 -763,000 -1,126,000 -363,000 -55,000 -58,000 -337,000 -56,000 -57,000 -66,000 204,305 -75,000 -54,000 -76,000  
      income from continuing operations before income taxes
                                                         94,444,000 82,160,000 145,878,000 153,191,000 139,548,000 128,881,000 128,469,000                               
      income from continuing operations
                                                         58,859,000 50,806,000 92,538,000 97,274,000 87,595,000 81,928,000 81,638,000 71,619,000 54,810,000 29,374,000 29,528,000 4,186,000                          
      loss from discontinued operations, net of income taxes
                                                                -367,000                              
      basic income per common share:
                                                                                              
      diluted income per common share:
                                                                                              
      benefit from bad debts
                                                                   -1,000,000                           
      income tax benefit:
                                                                                              
      income from discontinued operations, net of income taxes
                                                                                              
      depreciation, depletion and impairment
                                                                 59,982,500 85,431,000 78,783,000 75,716,000 80,512,000 70,131,000 68,857,000 70,347,000 49,349,250 67,998,000 65,673,000 63,726,000 66,805,000 66,523,000 59,947,000 55,931,000 56,125,000 49,215,000 47,481,000 43,549,000 45,818,000 39,216,000 36,959,000 34,400,000      
      net (gain) loss on asset disposals
                                                                   -21,939,000                           
      net income on asset disposals
                                                                    249,000                          
      drilling and completion fluids
                                                                     16,146,250 16,488,000 20,267,000 27,830,000 38,217,000 35,734,000 38,745,000 32,550,000 30,323,000 27,348,000 39,667,000 30,760,000 37,137,000 46,163,000 59,877,000 49,181,000 33,199,000 29,819,000 29,587,000 29,406,000 -64,927,443 23,455,000 23,424,000 18,139,000  
      net gain on asset disposals/retirements
                                                                     -137,000 -898,000                        
      net income (gain) on asset disposals/retirements
                                                                       176,000                       
      net loss on asset disposals/retirements
                                                                        174,000                      
      embezzlement recoveries
                                                                                              
      gain on disposal of assets
                                                                         -760,000 -505,000 -2,721,000  -4,150,750 -330,000                
      embezzlement costs
                                                                             -875,000 -1,145,000 -41,935,000               
      loss on disposal of assets
                                                                            186,000                  
      income before income taxes and cumulative effect of change in accounting principle
                                                                             131,635,000 144,876,000 214,871,000 179,425,000 242,083,000 282,578,000 271,197,000 247,976,000     -111,341,106 47,622,000 31,121,000 32,770,000  
      income before cumulative effect of change in accounting principle
                                                                             85,106,000 98,181,000 139,551,000 115,801,000 156,318,000 185,990,000 171,690,000 158,569,000     -70,144,267 29,964,000 19,607,000 20,682,000  
      cumulative effect of change in accounting principle, net of related income tax expense of 398
                                                                                    687,000          
      income before cumulative effect of change in accounting principle:
                                                                                              
      basic
                                                                             550 630 900 750 767.5 1,140 1,020           
      diluted
                                                                             550 620 880 730 757.5 1,120 1,000           
      (gain) loss on disposal of assets
                                                                               -16,475,000               
      embezzlement costs, net of recoveries
                                                                                 140,000 -1,512,000            
      bad debt expense
                                                                                   600,000 600,000 815,000 50,000 143,000 223,000 -498,103 192,000 217,000 90,000  
      embezzled funds and related expenses
                                                                                   673,000 3,780,000          
      (gain) loss on sale of assets
                                                                                    -871,000          
      drilling
                                                                                         143,462,750 206,454,000 188,222,000 179,175,000  
      cumulative effect of change in accounting principle, net of related income tax benefit of approximately 287
                                                                                              
      net income per common share:
                                                                                              
      basic:
                                                                                              
      cumulative effect of change in accounting principle
                                                                                              
      diluted:
                                                                                              
      depreciation, depletion and amortization
                                                                                            27,283,000  
      diluted:
                                                                                              
      basic
                                                                                            81,874,000  
      diluted
                                                                                            83,617,000  
    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 2023-12-31 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 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 2006-12-31 2006-09-30 2006-06-30 2006-03-31 2005-12-31 2005-09-30 2005-06-30 2005-03-31 2004-12-31 2004-09-30 2004-06-30 2004-03-31 2003-12-31 
                                                                                                
        assets
                                                                                                
        current assets:
                                                                                                
        cash, cash equivalents and restricted cash
      337,244,000 420,642,000 186,913,000 185,891,000 225,204,000 241,293,000 115,482,000 75,036,000 170,247,000 192,680,000 67,048,000                                                                                
        accounts receivable
      742,379,000 723,277,000 800,448,000 770,901,000 800,291,000 763,806,000 863,779,000 866,931,000 872,773,000 971,091,000 1,010,034,000 491,049,000 493,038,000 565,520,000 546,436,000 473,153,000 377,572,000 356,083,000 263,186,000 196,654,000 181,092,000 160,214,000 131,329,000 157,981,000 319,072,000 339,699,000 411,145,000 501,206,000 547,993,000 558,817,000 648,414,000 602,748,000 596,888,000 580,354,000 544,509,000 433,366,000 210,431,000 148,091,000 146,013,000 128,551,000 182,781,000 219,672,000 301,710,000 331,922,000 484,986,000 663,404,000 593,373,000 507,930,000 485,925,000 451,517,000 488,804,000 501,824,000 491,230,000 465,517,000 470,786,000 528,808,000 559,548,000 518,109,000 472,227,000 406,247,000 383,328,000 337,167,000 251,646,000 200,938,000 178,574,000 164,498,000 120,914,000 118,475,000 198,946,000 414,531,000 445,541,000 391,652,000 372,085,000 373,279,000 398,649,000 393,448,000 415,230,000 484,106,000 511,001,000 507,850,000 466,485,000  362,976,000 298,802,000 272,740,000  196,287,000 183,505,000 169,182,000  
        inventory
      150,592,000 160,280,000 155,933,000 163,687,000 167,767,000 167,023,000 172,750,000 172,405,000 183,178,000 180,805,000 186,514,000 68,036,000 65,275,000 58,038,000 55,216,000 53,528,000 45,302,000 42,359,000 34,924,000 33,763,000 34,369,000 33,085,000 33,693,000 34,977,000 34,142,000 36,357,000 37,334,000 68,611,000 65,871,000 65,579,000 69,412,000 81,158,000 72,069,000 69,167,000 40,672,000 36,132,000 20,754,000 20,191,000 19,851,000 11,532,000 13,220,000 14,716,000 17,422,000 22,672,000 28,346,000 32,251,000 29,162,000 28,525,000 22,663,000 21,248,000 24,274,000 23,960,000 22,954,000 26,889,000 25,709,000 27,390,000 28,585,000 31,306,000 25,556,000 23,486,000 18,387,000 17,215,000 9,530,000 9,821,000 9,354,000 6,941,000 34,913,000 40,486,000 42,695,000 41,999,000 40,313,000 39,888,000 40,956,000 44,416,000 43,941,000 42,664,000 44,415,000 43,947,000 36,083,000 32,386,000 33,233,000 27,907,000 20,916,000 21,920,000 18,164,000 17,738,000 16,382,000 15,025,000 14,673,000 15,206,000 
        other current assets
      92,057,000 113,892,000 134,207,000 120,644,000 124,148,000 123,193,000 150,239,000 165,003,000 128,504,000 141,122,000 160,677,000 91,954,000 64,212,000                                                                              
        total current assets
      1,322,272,000 1,418,091,000 1,277,501,000 1,241,123,000 1,317,410,000 1,295,315,000 1,302,250,000 1,279,375,000 1,354,702,000 1,485,698,000 1,424,273,000 801,327,000 780,268,000 829,419,000 712,949,000 621,218,000 532,909,000 583,653,000 543,532,000 508,100,000 487,602,000 477,956,000 532,110,000 517,535,000 584,707,000 631,815,000 677,560,000 897,744,000 927,731,000 950,197,000 1,006,819,000 1,007,958,000 1,038,975,000 746,855,000 678,297,000 571,749,000 729,944,000 283,321,000 280,293,000 455,723,000 494,211,000 486,536,000 505,741,000 515,794,000 687,620,000 909,092,000 748,096,000 758,731,000 851,251,000 808,650,000 792,280,000 773,279,000 741,313,000 699,991,000 695,235,000 760,565,000 767,404,000 764,950,000 691,278,000 630,150,000 613,247,000 557,410,000 451,494,000 383,532,000 442,725,000 457,268,000 435,729,000 449,785,000 537,742,000 641,374,000 632,096,000 609,659,000 551,968,000 522,785,000 543,205,000 586,330,000 574,294,000 652,670,000 661,964,000 623,490,000 802,951,000  561,529,000 437,119,000 400,013,000  330,521,000 293,347,000 309,876,000  
        property and equipment
      2,627,928,000 2,711,037,000 2,785,428,000 2,835,432,000 2,937,063,000 3,010,342,000 3,095,070,000 3,236,056,000 3,319,345,000 3,340,412,000 3,388,002,000 2,263,581,000 2,253,468,000 2,260,576,000 2,278,639,000 2,289,371,000 2,305,530,000 2,331,755,000 2,424,725,000 2,511,977,000 2,627,912,000 2,761,041,000 2,893,172,000 3,033,829,000 3,187,159,000 3,306,677,000 3,433,495,000 3,769,258,000 3,898,518,000 4,002,549,000 4,080,900,000 4,208,697,000 4,217,049,000 4,254,730,000 4,198,285,000 4,232,194,000 3,328,788,000 3,408,963,000 3,511,740,000 3,640,894,000 3,786,835,000 3,920,708,000 4,023,199,000 4,246,147,000 4,222,404,000 4,131,071,000 3,907,331,000 3,873,610,000 3,716,572,000 3,635,541,000 3,651,574,000 3,665,753,000 3,682,750,000 3,615,383,000 3,522,904,000 3,402,413,000 3,308,263,000 3,167,266,000 3,025,606,000 2,890,668,000 2,706,213,000 2,620,900,000 2,397,218,000 2,289,929,000 2,189,972,000 2,110,402,000 2,115,132,000 2,093,609,000 1,994,881,000 1,937,112,000 1,926,063,000 1,873,511,000 1,839,592,000 1,841,404,000 1,782,576,000 1,688,868,000               
        operating lease right of use asset
      37,978,000 42,982,000 43,216,000 41,686,000 42,787,000 44,385,000 47,424,000 48,769,000 51,272,000 47,599,000 48,045,000                                                                                
        finance lease right of use asset
      7,822,000 14,932,000 22,028,000 22,671,000 24,258,000 27,018,000 33,874,000 29,858,000 32,888,000 63,228,000 57,139,000                                                                                
        goodwill
      487,388,000 487,388,000 487,388,000 487,388,000 487,388,000 487,388,000 487,388,000 1,377,448,000 1,379,741,000 1,379,741,000 1,372,997,000                                                    86,234,000 86,234,000 86,234,000 86,234,000 86,234,000 86,234,000 86,234,000 86,234,000 96,198,000 96,198,000 96,198,000 96,198,000 96,198,000 96,198,000 96,198,000 99,056,000 99,056,000 99,056,000 99,056,000 99,056,000 101,326,000 101,326,000 101,326,000 101,326,000 102,525,000 101,360,000 101,360,000  
        intangible assets
      784,217,000 814,810,000 842,972,000 871,950,000 900,959,000 929,610,000 962,595,000 992,189,000 1,023,004,000 1,051,697,000 1,074,958,000 5,140,000 5,488,000 5,845,000 6,112,000 7,166,000 7,343,000 7,537,000 21,052,000 24,057,000 27,065,000                                                                      
        deposits on equipment purchases
      14,207,000 11,757,000 11,147,000 19,017,000 19,895,000 15,699,000 10,982,000 37,067,000 41,857,000 28,305,000 28,966,000 14,222,000 19,123,000 13,051,000 8,405,000 5,212,000 6,895,000 849,000 1,782,000 1,599,000 1,958,000 1,716,000 4,728,000 6,676,000 6,730,000 8,066,000 7,253,000 7,312,000 10,505,000 12,040,000 19,058,000 21,770,000 18,645,000 16,351,000 15,027,000 12,917,000 19,106,000 16,050,000 17,700,000 17,970,000 18,395,000 22,367,000 35,863,000 47,741,000 80,159,000 112,379,000 112,288,000 78,118,000 57,237,000 52,560,000 41,027,000 29,987,000 35,913,000 43,776,000 54,781,000 88,573,000 97,643,000 99,543,000 80,932,000 66,303,000 71,587,000 51,084,000 49,860,000 32,940,000 17,713,000 914,000  13,327,000 23,527,000 43,944,000 26,374,000   1,650,000                 
        other assets
      78,707,000 69,469,000 63,430,000 56,353,000 35,666,000 23,709,000 24,094,000 21,569,000 18,595,000 19,424,000 18,497,000 10,128,000                                                                               
        total assets
      5,360,519,000 5,570,466,000 5,533,110,000 5,575,620,000 5,765,426,000 5,833,466,000 5,963,677,000 7,022,331,000 7,226,188,000 7,420,031,000 7,420,574,000 3,117,196,000 3,092,345,000 3,143,823,000 3,041,999,000 2,959,977,000 2,888,964,000 2,957,848,000 3,017,463,000 3,073,306,000 3,171,842,000 3,299,069,000 3,491,225,000 3,624,805,000 3,870,284,000 4,439,615,000 4,609,093,000 5,191,783,000 5,367,752,000 5,469,866,000 5,819,942,000 5,953,990,000 6,015,724,000 5,758,856,000 5,472,975,000 5,404,056,000 4,178,619,000 3,804,606,000 3,908,873,000 4,211,471,000 4,398,170,000 4,533,317,000 4,678,166,000 5,049,528,000 5,230,907,000 5,394,011,000 4,968,349,000 4,908,367,000 4,812,895,000 4,687,127,000 4,677,522,000 4,663,716,000 4,657,232,000 4,556,911,000 4,469,975,000 4,442,615,000 4,363,832,000 4,221,901,000 3,986,693,000 3,777,589,000 3,582,966,000 3,423,031,000 2,997,408,000 2,799,992,000 2,743,498,000 2,662,152,000 2,644,971,000 2,651,351,000 2,651,682,000 2,712,817,000 2,658,549,000 2,583,957,000 2,492,442,000 2,465,199,000 2,426,900,000 2,376,880,000 2,228,669,000 2,192,503,000 2,094,889,000 1,942,195,000 2,029,210,000  1,716,481,000 1,517,518,000 1,437,068,000  1,249,828,000 1,193,774,000 1,179,948,000  
        liabilities and stockholders’ equity
                                                                                                
        current liabilities:
                                                                                                
        accounts payable
      442,423,000 470,782,000 461,265,000 426,509,000 513,963,000 421,318,000 493,360,000 476,460,000 544,864,000 534,420,000 579,724,000 245,562,000 271,442,000 237,056,000 263,761,000 252,692,000 206,798,000 190,219,000 165,779,000 120,853,000 101,165,000 91,622,000 74,367,000 72,958,000 140,102,000 170,475,000 208,801,000 242,166,000 260,378,000 288,962,000 349,213,000 371,518,000 359,582,000 319,621,000 303,522,000 255,327,000 158,226,000 125,667,000 82,163,000 66,343,000 81,975,000 82,771,000 165,547,000 223,001,000 315,746,000 382,438,000 370,127,000 319,311,000 263,820,000 173,150,000 181,191,000 198,114,000 233,576,000 188,823,000 215,516,000 224,917,000 274,788,000 241,610,000 267,990,000 230,495,000 193,409,000 162,400,000 181,134,000 172,352,000 164,401,000 83,700,000 89,634,000 111,100,000 108,657,000 169,958,000 158,659,000 151,674,000                   
        accrued liabilities
      256,326,000 366,488,000 283,880,000 261,653,000 273,678,000 385,751,000 326,794,000 329,226,000 323,984,000 446,268,000 389,934,000 204,006,000 204,047,000 304,143,000 188,246,000 189,203,000 182,381,000 238,511,000 167,128,000 166,295,000 164,179,000 175,004,000 181,560,000 190,372,000 204,346,000 219,850,000 220,638,000 218,632,000                                                               
        operating lease liability
      15,846,000 18,652,000 17,220,000 15,083,000 13,590,000 13,322,000 13,846,000 13,608,000 13,914,000 13,541,000 12,626,000                                                                                
        finance lease liability
      5,656,000 7,720,000 15,408,000 13,227,000 13,840,000 15,214,000 14,889,000 19,312,000 21,733,000 43,980,000 42,801,000                                                                                
        total current liabilities
      720,251,000 863,642,000 777,773,000 716,472,000 818,288,000 841,993,000 858,402,000 851,197,000 916,901,000 1,050,435,000 1,037,134,000 454,321,000 486,824,000 550,966,000 459,996,000 448,421,000 396,180,000 435,853,000 338,849,000 293,482,000 272,260,000 273,722,000 263,397,000 272,139,000 354,282,000 400,602,000 438,858,000 470,044,000 511,158,000 526,316,000 607,696,000 601,369,000 601,486,000 546,250,000 549,348,000 472,848,000 294,166,000 264,815,000 236,391,000 291,986,000 313,384,000 308,132,000 396,077,000 448,107,000 560,616,000 568,404,000 587,449,000 501,886,000 457,691,000 354,277,000 345,555,000 352,965,000 389,854,000 359,863,000 372,195,000 378,299,000 445,471,000 418,712,000 431,145,000 397,503,000 341,979,000 315,965,000 312,003,000 296,305,000 269,421,000 193,308,000 198,567,000 219,703,000 216,932,000 302,613,000 299,373,000 274,502,000 294,645,000 295,208,000 353,649,000 346,094,000 355,494,000 317,618,000 339,927,000 270,033,000 327,761,000  240,646,000 169,479,000 197,830,000  134,520,000 118,167,000 117,483,000  
        long-term operating lease liability
      25,084,000 27,607,000 29,140,000 29,591,000 32,060,000 34,305,000 36,794,000 38,137,000 40,227,000 37,848,000 38,895,000                                                                                
        long-term finance lease liability
      928,000 5,453,000 5,850,000 8,573,000 9,187,000 10,216,000 17,771,000 10,848,000 11,550,000 12,953,000 12,959,000                                                                                
        long-term debt
      1,221,363,000 1,221,038,000 1,220,716,000 1,220,398,000 1,220,083,000 1,219,770,000 1,219,461,000 1,219,156,000 1,221,058,000 1,224,941,000 1,228,209,000 822,408,000 822,196,000 830,937,000 852,949,000 877,739,000 852,530,000 852,323,000 902,104,000 901,896,000 901,689,000 901,484,000 967,366,000 967,140,000 966,768,000 966,540,000 969,909,000 1,119,648,000 1,119,426,000 1,119,205,000 1,119,002,000 1,118,918,000 1,118,836,000 598,783,000 598,697,000 598,610,000 598,524,000 598,437,000 598,351,000 741,169,000 764,559,000      675,000,000 677,500,000 680,000,000 682,500,000 685,000,000 687,500,000 690,000,000      385,000,000 387,500,000 390,000,000                              
        deferred tax liabilities
      212,032,000 215,818,000 232,803,000 240,142,000 238,512,000 238,097,000 245,687,000 280,432,000 268,421,000 248,107,000 217,681,000 58,635,000 47,401,000 28,738,000 23,027,000 25,464,000 29,234,000 29,234,000 22,922,000 40,603,000 56,703,000 77,676,000 102,747,000 115,740,000 134,765,000 202,959,000 226,663,000 291,294,000 299,557,000 306,161,000 324,924,000 340,718,000 348,250,000 350,836,000 576,312,000 588,594,000 614,361,000 682,976,000 724,564,000 768,556,000 822,364,000 863,833,000 826,163,000 892,239,000 914,711,000 935,660,000 836,404,000 873,106,000 878,771,000 887,864,000 896,655,000 885,807,000 871,403,000 857,302,000 846,926,000 828,415,000 808,857,000 786,632,000 718,927,000 630,737,000 576,060,000 511,422,000 448,645,000 388,672,000 380,966,000 381,656,000 339,763,000 305,500,000 290,124,000 277,717,000 259,803,000 247,597,000 232,173,000 219,490,000 216,199,000 208,382,000 197,807,000 187,960,000 186,507,000 179,122,000 175,219,000 169,188,000 171,542,000 169,809,000 163,071,000 162,040,000 160,472,000 149,747,000 152,637,000 143,490,000 
        other liabilities
      15,158,000 12,193,000 11,743,000 11,771,000 11,891,000 13,241,000 13,604,000 14,047,000 16,174,000 25,066,000 26,082,000 44,376,000                                                                               
        total liabilities
      2,194,816,000 2,345,751,000 2,278,025,000 2,226,947,000 2,330,021,000 2,357,622,000 2,391,719,000 2,413,817,000 2,474,331,000 2,599,350,000 2,560,960,000 1,397,027,000 1,419,388,000 1,478,300,000 1,407,614,000 1,383,896,000 1,312,265,000 1,348,361,000 1,291,818,000 1,265,589,000 1,259,696,000 1,283,010,000 1,371,662,000 1,395,932,000 1,491,391,000 1,605,995,000 1,666,107,000 1,913,472,000 1,964,383,000 1,964,443,000 2,064,515,000 2,073,651,000 2,081,183,000 1,776,363,000 1,879,773,000 1,786,253,000 1,517,010,000 1,555,882,000 1,584,747,000 1,809,641,000 1,908,688,000 1,972,186,000 2,047,069,000 2,181,516,000 2,332,369,000 2,488,201,000 2,108,889,000 2,060,923,000 2,023,225,000 1,931,130,000 1,933,647,000 1,932,876,000 1,957,899,000 1,916,254,000 1,825,807,000 1,813,332,000 1,749,357,000 1,705,270,000 1,559,960,000 1,426,529,000 1,324,096,000 1,235,424,000 863,269,000 691,570,000 656,296,000 580,452,000 543,796,000 530,731,000 512,636,000 585,875,000 564,984,000 527,668,000 532,384,000 569,169,000 584,307,000 574,036,000 558,005,000 630,037,000 595,860,000 453,545,000 507,172,000  416,310,000 343,639,000 364,134,000  299,924,000 272,820,000 274,976,000  
        commitments and contingencies
                                                                                                
        stockholders’ equity:
                                                                                                
        common stock
      5,240,000 5,236,000 5,235,000 5,234,000 5,216,000 5,206,000 5,207,000 5,205,000 5,180,000 5,166,000 5,158,000 3,049,000 3,024,000 3,023,000 3,023,000 3,023,000 2,994,000 2,993,000 2,729,000 2,728,000 2,712,000 2,710,000 2,708,000 2,706,000 2,695,000 2,694,000 2,692,000 2,688,000 2,673,000 2,673,000 2,671,000 2,667,000 2,663,000 2,662,000 2,574,000 2,569,000 2,097,000 1,915,000 1,915,000 1,911,000 1,904,000 1,904,000 1,904,000 1,904,000 1,893,000 1,893,000 1,892,000 1,890,000 1,870,000 1,865,000 1,865,000 1,864,000 1,852,000 1,841,000 1,840,000 1,840,000 1,833,000 1,833,000 1,831,000 1,830,000 1,816,000 1,815,000 1,814,000 1,815,000 1,808,000 1,808,000 1,808,000 1,808,000 1,801,000 1,801,000 1,802,000 1,802,000 1,776,000 1,773,000 1,773,000 1,773,000 1,767,000 1,766,000 1,766,000 1,762,000 1,761,000  1,758,000 1,748,000 1,725,000  1,701,000 1,700,000 847,000  
        additional paid-in capital
      6,497,270,000 6,492,862,000 6,484,104,000 6,475,445,000 6,465,885,000 6,453,606,000 6,443,043,000 6,430,119,000 6,419,331,000 6,407,294,000 6,395,867,000 3,208,927,000 3,202,214,000 3,202,973,000 3,197,334,000 3,191,678,000 3,176,177,000 3,171,536,000 2,919,090,000 2,914,043,000 2,908,125,000 2,902,236,000 2,895,753,000 2,889,163,000 2,884,839,000 2,875,680,000 2,866,412,000 2,856,746,000 2,836,492,000 2,827,154,000 2,814,748,000 2,805,575,000 2,795,672,000 2,785,823,000 2,588,327,000 2,575,401,000 1,521,438,000 1,042,696,000 1,034,768,000 1,023,001,000 1,018,699,000 1,011,811,000 1,006,306,000 999,622,000 991,495,000 984,674,000 977,425,000 961,854,000 930,205,000 913,505,000 906,639,000 899,802,000 890,809,000 863,558,000 856,981,000 850,951,000 846,550,000 840,731,000 831,869,000 824,725,000 801,681,000 796,641,000 791,265,000 788,421,000 785,691,000 781,635,000 777,272,000 773,617,000 769,652,000 765,512,000 760,459,000 755,124,000 712,043,000 703,581,000 697,415,000 691,472,000 685,344,000 681,069,000 674,903,000 671,333,000 665,704,000 672,151,000 671,303,000 651,615,000 609,720,000 597,280,000 578,194,000 579,314,000 570,212,000 506,018,000 
        retained earnings
      -1,320,377,000 -1,257,691,000 -1,217,668,000   -1,039,338,000 -956,173,000 54,209,000 75,295,000 57,035,000 28,921,000 62,899,000      -198,316,000 167,860,000 254,696,000 361,792,000 472,014,000 582,360,000 698,286,000 852,426,000 1,294,902,000 1,388,691,000 1,658,417,000 1,716,334,000 1,753,557,000 1,963,546,000 2,047,379,000 2,067,007,000 2,105,897,000 1,914,966,000 1,953,023,000 2,049,476,000 2,116,341,000 2,197,424,000 2,284,520,000 2,373,339,000 2,458,554,000 2,531,923,000 2,772,613,000 2,806,300,000 2,811,815,000 2,768,868,000 2,767,526,000 2,727,805,000 2,707,439,000 2,698,056,000 2,630,867,000 2,597,460,000 2,548,542,000 2,497,029,000 2,453,741,000 2,368,853,000 2,279,367,000 2,199,560,000 2,125,409,000 2,051,543,000 1,987,999,000 1,941,854,000 1,920,184,000 1,898,362,000 1,901,853,000 1,927,699,000 1,953,954,000 1,979,372,000 1,970,824,000 1,915,890,000 1,831,947,000 1,775,536,000 1,716,620,000 1,649,998,000 1,570,507,000 1,449,816,000 1,346,542,000 1,202,744,000 1,029,740,000 871,463,000 719,113,000 642,596,000 539,365,000 468,490,000 415,489,000 381,148,000 354,522,000 339,101,000 316,329,000 
        accumulated other comprehensive income
      -1,694,000 -1,155,000 -1,825,000   -2,584,000 -51,000 -648,000 -521,000 472,000       6,030,000 5,915,000 5,853,000 6,085,000 5,830,000 5,412,000 5,005,000 4,787,000 4,092,000 5,478,000 5,133,000 4,279,000 3,431,000 2,487,000 4,828,000 3,308,000 4,838,000 6,822,000 5,461,000 1,854,000   675,000 3,054,000 2,585,000 -4,093,000 -1,991,000 918,000 -2,115,000 6,463,000 10,310,000 15,209,000 10,721,000 14,076,000 18,099,000 15,716,000 19,464,000 21,767,000 23,263,000 18,847,000 22,013,000 19,459,000 18,137,000 23,757,000 24,295,000 21,597,000 19,646,000 18,027,000 20,321,000 14,996,000 12,988,000 9,388,000 5,406,000 5,774,000 16,424,000 18,126,000 17,201,000 20,207,000 19,400,000 14,808,000 9,038,000  11,581,000 11,103,000 8,400,000  8,669,000 6,383,000 11,080,000  8,000,000 5,043,000 6,467,000 8,554,000 
        treasury stock
      -2,021,064,000 -2,020,714,000 -2,021,041,000 -1,987,133,000 -1,971,362,000 -1,951,067,000 -1,929,899,000 -1,889,775,000 -1,756,288,000 -1,657,675,000 -1,578,077,000 -1,554,706,000 -1,527,386,000 -1,453,079,000 -1,395,906,000 -1,395,906,000 -1,372,654,000 -1,372,641,000 -1,369,887,000 -1,369,835,000 -1,366,313,000 -1,366,313,000 -1,366,263,000 -1,366,069,000 -1,365,159,000 -1,345,134,000 -1,319,942,000 -1,243,819,000 -1,155,561,000 -1,080,448,000 -1,030,366,000 -978,590,000 -935,639,000 -918,711,000 -918,126,000 -915,044,000 -911,317,000 -911,094,000 -910,656,000 -910,656,000 -907,045,000 -907,045,000 -907,045,000 -907,045,000 -899,035,000 -899,035,000 -899,035,000 -899,035,000 -880,931,000 -880,888,000 -880,784,000 -817,409,000 -810,252,000 -795,051,000 -734,945,000 -696,096,000 -624,774,000 -624,759,000 -624,664,000 -624,661,000 -620,465,000 -620,445,000 -620,440,000 -620,025,000 -618,980,000 -618,592,000 -618,592,000 -618,147,000 -617,185,000 -616,969,000 -601,010,000 -550,710,000 -546,498,000 -546,151,000 -525,993,000 -475,716,000 -475,301,000 -475,301,000 -391,965,000 -225,288,000 -25,290,000  -13,137,000 -13,137,000 -13,137,000  -13,137,000 -13,137,000 -11,655,000 -11,655,000 
        total stockholders’ equity attributable to controlling interests
      3,159,375,000 3,218,538,000 3,248,805,000 3,342,345,000 3,426,991,000 3,465,823,000 3,562,127,000 4,599,110,000 4,742,997,000 4,812,292,000 4,851,213,000                                                                                
        noncontrolling interest
      6,328,000 6,177,000 6,280,000 6,328,000 8,414,000 10,021,000 9,831,000 9,404,000 8,860,000 8,389,000 8,401,000                                                                                
        total equity
      3,165,703,000 3,224,715,000 3,255,085,000 3,348,673,000 3,435,405,000 3,475,844,000 3,571,958,000 4,608,514,000 4,751,857,000 4,820,681,000 4,859,614,000                                                                                
        total liabilities and stockholders’ equity
      5,360,519,000 5,570,466,000 5,533,110,000 5,575,620,000 5,765,426,000 5,833,466,000 5,963,677,000 7,022,331,000 7,226,188,000 7,420,031,000 7,420,574,000   3,143,823,000    2,957,848,000    3,299,069,000    4,439,615,000    5,469,866,000    5,758,856,000    3,804,606,000    4,533,317,000    5,394,011,000  4,908,367,000 4,812,895,000 4,687,127,000 4,677,522,000 4,663,716,000 4,657,232,000 4,556,911,000 4,469,975,000 4,442,615,000 4,363,832,000 4,221,901,000 3,986,693,000 3,777,589,000 3,582,966,000 3,423,031,000 2,997,408,000 2,799,992,000 2,743,498,000 2,662,152,000 2,644,971,000 2,651,351,000 2,651,682,000 2,712,817,000 2,658,549,000 2,583,957,000 2,492,442,000 2,465,199,000 2,426,900,000 2,376,880,000 2,228,669,000 2,192,503,000 2,094,889,000 1,942,195,000 2,029,210,000  1,716,481,000 1,517,518,000 1,437,068,000  1,249,828,000 1,193,774,000 1,179,948,000  
        current maturities of long-term debt
          3,217,000 6,388,000 9,513,000 12,591,000 12,406,000 12,226,000 12,049,000                                                                                
        preferred stock, par value 0.01; authorized 1,000,000 shares, no shares issued
                                                                                                
        retained deficit
         -1,150,176,000 -1,069,875,000        -4,895,000 -87,394,000 -170,066,000 -222,714,000 -235,848,000                                                                          
        accumulated other comprehensive loss
         -1,025,000 -2,873,000      -656,000                          -85,000 -1,134,000                                                     
        deferred tax assets
              4,784,000 3,927,000 7,697,000 4,027,000 3,570,000 3,210,000 3,567,000 2,819,000 3,812,000 3,975,000             2,580,000 1,857,000 1,007,000 3,875,000 2,562,000 1,339,000 4,771,000 36,439,000 34,897,000 28,487,000 35,268,000 65,121,000 37,809,000 33,879,000 39,926,000 37,075,000 32,322,000 27,962,000 33,852,000 32,952,000 29,179,000 35,716,000 42,505,000 52,959,000 71,288,000 81,932,000 116,543,000 142,725,000 123,828,000 75,796,000 52,501,000 26,815,000 62,313,000 21,320,000 28,079,000 32,877,000 98,058,000 59,671,000 39,443,000 35,928,000 34,355,000 33,930,000 35,593,000 35,370,000 35,153,000 36,504,000 48,244,000 48,868,000 44,528,000 27,740,000 26,635,000 26,382,000 19,688,000 17,919,000 15,243,000 15,991,000 25,983,000 21,645,000 21,239,000 16,449,000 
        cash and cash equivalents
                 150,288,000 157,218,000 137,553,000 42,735,000 19,636,000 48,264,000 117,524,000 191,284,000 216,682,000 214,144,000 224,915,000 303,741,000 246,781,000 152,200,000 174,185,000 164,829,000 255,514,000 248,901,000 245,029,000 214,032,000 241,908,000 304,251,000 42,828,000 37,839,000 40,132,000 466,608,000 35,152,000 36,972,000 209,627,000 186,557,000 113,346,000 76,465,000 76,506,000 86,917,000 43,012,000 38,594,000 120,837,000 257,746,000 249,509,000 204,636,000 148,877,000 144,031,000 110,723,000 83,473,000 75,299,000 17,825,000 23,946,000 10,645,000 64,584,000 37,670,000 27,612,000 73,916,000 95,979,000 63,884,000 49,877,000 119,243,000 167,665,000 192,288,000 81,223,000 25,019,000 62,232,000 50,327,000 17,434,000 20,516,000 27,475,000 16,930,000 13,385,000 16,945,000 18,992,000 253,404,000 136,398,000 131,211,000 70,077,000 68,296,000 112,371,000 69,766,000 63,353,000 92,192,000 100,483,000 
        right of use asset
                 18,771,000 19,897,000 20,841,000 21,893,000 22,815,000 19,697,000 19,024,000 15,376,000 16,312,000 15,900,000 16,850,000 17,679,000 18,699,000 29,570,000 31,275,000 23,613,000 26,665,000 28,405,000                                                              
        liabilities and stockholders' equity
                                                                                                
        lease liability
                 4,753,000 5,045,000 5,123,000 5,421,000 5,723,000 6,432,000 6,891,000 5,942,000 6,334,000 6,916,000 7,096,000 7,470,000 8,809,000 9,493,000 9,935,000 8,884,000 8,977,000 9,217,000                                                              
        long-term lease liability
                 17,287,000 18,390,000 19,594,000 20,591,000 21,607,000 18,280,000 18,108,000 15,798,000 17,150,000 17,497,000 19,118,000 20,738,000 23,556,000 25,512,000 26,644,000 20,395,000 22,355,000 23,903,000                                                              
        stockholders' equity:
                                                                                                
        total stockholders' equity
                 1,720,169,000 1,672,957,000  1,634,385,000 1,576,081,000 1,576,699,000  1,725,645,000 1,807,717,000 1,912,146,000  2,119,563,000 2,228,873,000 2,378,893,000  2,942,986,000 3,278,311,000 3,403,369,000  3,755,427,000 3,880,339,000 3,934,541,000  3,593,202,000 3,617,803,000 2,661,609,000  2,324,126,000 2,401,830,000 2,489,482,000  2,631,097,000 2,868,012,000 2,898,538,000  2,859,460,000                                            
        total liabilities and stockholders' equity
                 3,117,196,000 3,092,345,000  3,041,999,000 2,959,977,000 2,888,964,000  3,017,463,000 3,073,306,000 3,171,842,000  3,491,225,000 3,624,805,000 3,870,284,000  4,609,093,000 5,191,783,000 5,367,752,000  5,819,942,000 5,953,990,000 6,015,724,000  5,472,975,000 5,404,056,000 4,178,619,000  3,908,873,000 4,211,471,000 4,398,170,000  4,678,166,000 5,049,528,000 5,230,907,000  4,968,349,000                                            
        federal and state income taxes receivable
                  525,000 399,000 275,000 187,000 67,000 67,000 64,000 72,000 169,000 4,428,000 4,778,000 8,725,000 8,374,000 6,397,000 5,991,000 5,954,000 4,083,000 4,110,000  1,169,000 1,128,000 1,152,000 630,000 3,666,000 1,878,000 2,126,000 3,838,000 36,671,000 37,321,000 33,454,000 30,952,000   81,726,000  2,845,000    2,373,000   764,000 1,905,000    1,310,000 72,731,000 75,062,000 4,635,000 5,160,000 122,479,000 118,869,000 10,465,000 6,765,000 13,002,000 10,175,000 985,000                  6,961,000 12,667,000 
        other
                  10,531,000 67,909,000 68,287,000 74,714,000 61,704,000 67,620,000 54,074,000 60,929,000 57,828,000 55,314,000 58,569,000 69,071,000 70,919,000 75,177,000 58,261,000 66,459,000 60,883,000 76,662,000 74,961,000 80,975,000 64,639,000 53,354,000 54,647,000 58,453,000 30,273,000 41,322,000 38,722,000 40,855,000 39,064,000 40,227,000 41,383,000 50,815,000 47,445,000 51,624,000 54,645,000 70,632,000 51,065,000 53,424,000 45,387,000 60,529,000 40,593,000 43,903,000 43,215,000 45,231,000 44,903,000 48,864,000 59,022,000 58,727,000 48,630,000 50,169,000 49,454,000 50,314,000 40,355,000 41,782,000 52,136,000 56,723,000 51,368,000 57,518,000 59,509,000 63,512,000 53,007,000 50,636,000 42,813,000 38,998,000 34,041,000 32,170,000 53,407,000 34,539,000 23,194,000 25,168,000 26,738,000 28,401,000 25,570,000 26,836,000 22,103,000 9,819,000 5,629,000 6,910,000 
        federal and state income taxes payable
                  6,290,000 4,644,000 2,568,000 803,000 569,000 232,000       341,000 342,000 535,000 269,000 1,367,000 1,408,000 2,128,000             11,153,000 30,994,000  24,378,000  24,855,000 10,670,000 699,000  7,261,000 6,158,000   8,241,000 2,473,000 854,000                                
        total stockholders’ equity
                   1,665,523,000    1,609,487,000    2,016,059,000    2,833,620,000    3,505,423,000    3,982,493,000    2,248,724,000    2,561,131,000    2,905,810,000  2,847,444,000 2,789,670,000 2,755,997,000 2,743,875,000 2,730,840,000 2,699,333,000 2,640,657,000 2,644,168,000 2,629,283,000 2,614,475,000 2,516,631,000 2,426,733,000 2,351,060,000 2,258,870,000 2,187,607,000 2,134,139,000 2,108,422,000 2,087,202,000 2,081,700,000 2,101,175,000 2,120,620,000 2,139,046,000 2,126,942,000 2,093,565,000 2,056,289,000 1,960,058,000 1,896,030,000 1,842,593,000 1,802,844,000 1,670,664,000 1,562,466,000 1,499,029,000 1,488,650,000 1,522,038,000  1,300,171,000 1,173,879,000 1,072,934,000  949,904,000 920,954,000 904,972,000  
        goodwill and intangible assets
                           30,087,000 33,151,000 38,336,000 43,640,000 444,004,000 449,308,000 472,413,000 476,078,000 477,640,000 681,365,000 684,528,000 689,398,000 687,072,000 533,682,000 540,273,000 88,055,000 88,966,000 89,877,000 90,788,000 91,698,000 92,609,000 93,520,000 218,992,000 219,902,000 220,813,000 180,223,000 177,303,000 166,559,000 167,470,000 168,380,000 169,408,000 170,435,000 171,463,000 172,491,000 173,518,000 174,546,000 175,573,000 176,601,000 177,628,000 178,656,000 179,683,000                             
        preferred stock, par value .01; authorized 1,000,000 shares, no shares issued
                                                                                                
        accrued expenses
                                  240,196,000 235,946,000 256,355,000 229,851,000 241,904,000 226,629,000 245,826,000 217,521,000 135,940,000 139,148,000 154,228,000 139,922,000 154,439,000 161,611,000 180,530,000 171,453,000 178,876,000 173,466,000 182,944,000 172,575,000 159,016,000 160,457,000 153,665,000 146,101,000 141,517,000 158,632,000 156,679,000 153,382,000 152,442,000 164,629,000 152,301,000 158,258,000 141,070,000 147,315,000 125,869,000 123,953,000 105,020,000 109,608,000 108,933,000 108,603,000 108,275,000 132,655,000 140,714,000 122,828,000 123,000,000 136,834,000 131,806,000 123,874,000 121,044,000 145,463,000 150,669,000 124,536,000 119,324,000 112,476,000 102,493,000 85,280,000 85,475,000 79,163,000 67,985,000 51,658,000 52,473,000 52,066,000 
        borrowings under revolving credit facility
                                       268,000,000 144,000,000 115,000,000   15,000,000       303,000,000           108,500,000 110,000,000 15,800,000                                
        current portion of long-term debt, net of debt issuance cost of 483 at december 31, 2015
                                                                                                
        current portion of long-term debt, net of debt issuance cost of 529 and 483 at june 30, 2016 and december 31, 2015, respectively
                                             85,721,000                                                   
        current portion of long-term debt, net of debt issuance cost of 530 and 483 at march 31, 2016 and december 31, 2015, respectively
                                              76,970,000                                                  
        current portion of long-term debt
                                               63,750,000 50,000,000 42,500,000 35,000,000 12,500,000 10,000,000 10,000,000 10,000,000 10,000,000 10,000,000 8,750,000 7,500,000 6,250,000   10,000,000 10,000,000 10,000,000 8,750,000 7,500,000                              
        other long-term debt
                                               791,250,000 815,000,000 830,000,000 845,000,000 670,000,000        692,500,000 600,000,000 600,000,000 380,000,000 382,500,000                                 
        assets held for sale
                                                                   23,370,000    42,424,000                         
        current portion of long term debt
                                                                   6,250,000 5,000,000                            
        long term debt
                                                                   392,500,000 95,000,000                            
        borrowings under line of credit
                                                                               50,000,000 10,000,000 15,000,000  120,000,000 65,000,000            
        accrued federal and state income taxes receivable
                                                                             18,445,000      5,448,000             
        accrued federal and state income taxes payable
                                                                              27,713,000 1,458,000 1,011,000 831,000 41,472,000  15,519,000  66,574,000 11,034,000 30,854,000 10,278,000 25,991,000 2,754,000     
        accounts payable:
                                                                                                
        trade
                                                                              131,028,000 133,330,000 193,454,000 190,129,000 163,523,000 138,372,000 152,573,000 123,511,000 119,085,000  89,964,000 58,717,000 66,109,000  43,355,000 45,180,000 44,928,000  
        accrued revenue distributions
                                                                              3,277,000 4,221,000 15,136,000 18,161,000 16,680,000 15,359,000 14,512,000 14,131,000 10,864,000  14,379,000 11,388,000 10,434,000  11,591,000 11,863,000 11,650,000  
        deposits on equipment purchase contracts
                                                                                2,133,000 4,741,000 15,434,000              
        embezzlement recovery receivable
                                                                                 42,500,000               
        property and equipment, at cost
                                                                                  1,553,307,000 1,435,804,000 1,328,795,000 1,214,789,000 1,122,265,000 1,053,845,000 1,048,561,000 973,938,000 931,768,000 828,875,000 802,851,000 785,153,000 766,357,000 693,631,000 
        deposit on equipment purchase contract
                                                                                   24,746,000             
        deferred compensation
                                                                                       -9,287,000 -11,018,000 -12,095,000 -4,944,000 -5,420,000 -6,002,000 -6,488,000   
        accumulated other comprehensive income, net of tax
                                                                                   8,390,000    8,565,000    11,611,000     
        prepaid federal and state income taxes
                                                                                     1,983,000           
        investment in equity securities
                                                                                               20,274,000 
        accrued federal income taxes payable
                                                                                            9,149,000 4,301,000   
        goodwill and other intangible assets
                                                                                               51,179,000 
      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 2023-12-31 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 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 2006-12-31 2006-09-30 2006-06-30 2006-03-31 2005-12-31 2005-09-30 2005-06-30 2005-03-31 2004-12-31 2004-09-30 2004-06-30 2004-03-31 
                                                                                                 
          cash flows from operating activities:
                                                                                                 
          net income
        -24,476,000 -9,197,000 -36,450,000 -48,697,000 1,290,000 -51,392,000 -978,334,000 11,621,000 51,706,000 61,938,000 -278,000 84,614,000 99,678,000 100,097,000                           -70,503,000 -58,658,000 -225,978,000 -18,975,000 9,125,000 57,583,000 15,976,000 54,283,000 34,822,000 16,591,000 74,420,000 40,768,000 56,230,000 58,859,000 50,806,000 92,538,000 97,274,000 87,595,000 81,928,000 81,638,000 71,252,000 53,854,000 29,374,000 29,528,000 4,186,000 -18,170,000 -18,580,000 -17,743,000 16,203,000 79,492,000 108,746,000 81,422,000 77,409,000 85,106,000 98,181,000 139,551,000 115,801,000 156,318,000 185,990,000 171,690,000 159,256,000 125,192,000 110,135,000 77,665,000 59,748,000 38,480,000 29,964,000 19,607,000 20,682,000 
          adjustments to reconcile net income to net cash from operating activities:
                                                                                                 
          depreciation, depletion, amortization and impairment
        218,394,000 220,942,000 225,598,000 261,858,000 231,866,000 254,599,000 374,680,000 267,638,000 274,956,000 278,787,000 197,635,000 126,814,000 128,180,000 123,304,000 122,150,000 121,553,000 116,938,000 411,194,000 141,065,000 144,037,000 152,882,000 153,709,000 157,319,000 173,085,000 186,797,000 180,011,000 400,764,000 208,688,000 214,410,000 212,390,000 281,652,000 212,384,000 209,892,000 211,154,000 196,642,000 219,328,000 156,217,000 157,225,000 163,464,000 170,975,000 176,770,000 175,302,000 332,151,000 181,924,000 175,382,000 180,157,000 237,825,000 153,426,000 147,322,000 183,118,000 140,734,000 137,182,000 136,435,000 132,791,000 142,393,000 128,477,000 122,953,000 127,602,000 110,713,000 102,749,000 96,215,000                         30,872,000 30,789,000   
          deferred income tax expense
        -3,792,000 -16,078,000 -7,303,000 1,345,000 359,000 -7,589,000 -30,428,000 16,745,000 19,507,000 29,543,000 -6,757,000 10,777,000 18,303,000 6,068,000 526,000 404,000            -6,604,000    282,000            -23,800,000 94,503,000 -41,062,000 225,000 -9,993,000 -12,564,000 17,385,000 21,193,000 24,555,000 28,705,000 29,155,000 54,169,000 48,407,000 48,808,000 40,158,000 31,382,000 38,619,000 107,122,000 18,980,000 14,465,000 6,923,000 105,711,000 -6,213,000 -7,160,000 9,105,000 22,516,000 12,769,000 16,551,000 14,203,000 2,605,000 6,505,000 18,970,000 10,191,000   1,113,000 5,874,000 16,825,000 -1,864,000 361,000 1,779,000 13,413,000 5,662,000 -3,141,000 7,539,000 
          stock-based compensation
        4,412,000 8,759,000 8,660,000 9,578,000 12,289,000 10,562,000 12,926,000 10,813,000 12,051,000 13,412,000 27,358,000 6,738,000 -758,000                                                                             
          net loss on asset disposals
        1,861,000        -2,668,000    538,000                                    -1,744,000    125,000        -1,604,000                             
          other
        -1,600,000 710,000 1,999,000 -1,806,000 -166,000 6,268,000 539,000 516,000 613,000 135,000 -972,000 903,000 -7,000 -100,000 -62,000 -226,000 -2,116,000 -177,000 -122,000 -118,000 -105,000 -303,000                                                                    
          changes in operating assets and liabilities:
                                                                                                 
          accounts receivable
        -17,796,000 77,560,000 -30,080,000 29,642,000 -36,544,000 99,961,000 2,046,000 6,526,000 95,119,000 39,337,000 -29,264,000 1,989,000 72,482,000 -19,084,000 -73,283,000 -95,607,000 -21,252,000 -44,115,000 -66,803,000 -15,561,000 -20,877,000 -28,871,000 26,661,000 156,582,000 19,490,000 69,378,000 90,022,000 43,259,000 10,929,000 91,490,000 -45,612,000 -5,895,000 -16,468,000 6,925,000 -110,865,000 -73,251,000 -62,291,000 -2,415,000 -16,817,000 54,197,000 37,362,000 81,580,000 29,128,000 153,504,000 176,672,000 -71,020,000 -86,076,000 -21,529,000 -35,434,000 35,669,000 12,363,000 -10,805,000 -25,220,000 5,123,000 57,937,000 27,661,000 -38,109,000 -49,794,000 -61,955,000 -23,264,000 -48,152,000 -80,989,000 -50,073,000 -21,650,000 -25,732,000 -74,376,000 -2,312,000 79,319,000 211,182,000 24,959,000 -55,917,000 -19,442,000 -167,000 25,293,000 -3,643,000 22,209,000 68,494,000 24,652,000 -5,884,000 -41,051,000 -45,134,000  -63,408,000 -26,426,000 -58,991,000  -12,511,000 -14,862,000 -7,107,000 
          inventory
        -5,658,000 -6,843,000 2,752,000 270,000 2,046,000 3,623,000 -5,307,000 806,000 -10,585,000 -1,438,000 -17,053,000                                                                               
          other current assets
        21,824,000 19,875,000 -1,884,000 -14,496,000 12,516,000 27,056,000 14,707,000 -36,498,000 14,334,000 19,693,000 -5,769,000                                                                               
          other assets
        4,897,000 6,695,000 6,589,000 288,000 2,948,000 10,363,000 7,398,000 7,609,000 8,390,000 8,226,000 12,935,000                                                                               
          accounts payable
        -18,630,000 24,389,000 29,772,000 -80,906,000 98,038,000 -87,536,000 20,374,000 -81,097,000 35,401,000 -40,341,000 -25,174,000 -28,543,000 24,329,000 -20,483,000 16,808,000 28,703,000 13,958,000 -8,416,000 24,892,000 25,082,000 9,383,000 9,186,000 8,127,000 -42,916,000 -22,999,000 -33,416,000 -27,329,000 917,000 -17,858,000 -37,518,000 -8,503,000 -918,000 -22,514,000 12,573,000 33,127,000 47,120,000 11,252,000 31,676,000 6,086,000 -10,850,000 -14,888,000 -10,909,000 -12,316,000 -43,228,000 -65,196,000 14,756,000 21,853,000 27,748,000 22,264,000 -10,876,000 -3,295,000 4,117,000 21,385,000 -12,097,000 -4,636,000 -38,884,000 30,418,000 -16,025,000 47,371,000 -3,404,000 14,053,000 17,902,000 13,233,000 -1,024,000 19,465,000 15,684,000 6,557,000 6,392,000 -81,306,000 6,293,000 -10,881,000 360,000 14,569,000 -23,498,000 -23,695,000 -19,583,000 26,459,000 -13,096,000 29,418,000 7,507,000 3,355,000  34,087,000 -6,317,000 10,798,000  -2,218,000 551,000 3,894,000 
          accrued liabilities
        -110,254,000 82,564,000 21,314,000 -12,293,000 -113,103,000 57,978,000 -3,213,000 3,844,000 -125,191,000 48,205,000 34,857,000 -5,466,000 -101,080,000 115,632,000 -1,054,000 6,712,000 -56,199,000 58,280,000 776,000 2,097,000 -10,882,000 -14,633,000 -7,370,000 -21,645,000 -15,592,000  1,891,000                                                               
          other liabilities
        -5,324,000 -12,896,000 -4,398,000 -4,770,000 -2,689,000 -4,648,000 -5,793,000 -6,707,000 -12,973,000 -2,640,000 -33,243,000 -1,181,000 -5,019,000 -4,451,000 38,756,000 -7,038,000 935,000 -2,854,000 -3,487,000 -122,000 -1,349,000 -1,946,000 -4,078,000 -2,421,000 -2,341,000 -4,130,000 -2,038,000 -2,056,000 -915,000 -401,000 269,000 9,000 67,000 692,000 183,000 -519,000 261,000 1,991,000 -343,000 -460,000 -628,000 -905,000 -1,380,000 -920,000 857,000 1,137,000 1,563,000 1,626,000 221,000 52,000 -167,000 -38,000 53,000 -97,000 68,000 89,000 -897,000 -1,662,000 -1,701,000 -5,268,000 520,000 1,016,000 1,028,000 684,000 506,000 -13,000 -62,000 -52,000 35,000 -263,000 14,372,000 -4,397,000 -8,638,000 7,122,000 -921,000 674,000 -5,404,000 11,803,000 -1,165,000 -3,861,000 6,639,000  -1,089,000 628,000 1,974,000  -2,696,000 -3,220,000 -813,000 
          net cash from operating activities
        63,858,000 397,526,000 215,803,000 139,749,000 208,141,000 315,834,000 296,289,000 197,522,000 365,891,000 452,632,000 156,076,000 162,857,000 234,349,000 302,941,000 178,230,000 51,343,000 33,674,000 43,898,000 7,401,000 35,575,000 8,622,000 -4,427,000 63,952,000 146,042,000 73,291,000 112,362,000 218,542,000 181,467,000 183,832,000 241,924,000 188,511,000 150,270,000 149,965,000 169,446,000 115,880,000 9,828,000 5,557,000 52,328,000 70,779,000 68,194,000 113,733,000 193,398,000 165,378,000 235,676,000 404,985,000 162,393,000 206,154,000 180,682,000 179,497,000 232,171,000 273,357,000 173,626,000 209,717,000 222,990,000 286,881,000 231,804,000 263,665,000 212,700,000 220,624,000 262,166,000 173,107,000 123,231,000 108,886,000 205,835,000 87,746,000 37,449,000 61,460,000 139,873,000 214,895,000 215,363,000 186,365,000 91,419,000 181,857,000 168,030,000 197,610,000 137,555,000 309,029,000 223,058,000 261,284,000 117,689,000 235,139,000  165,779,000 70,961,000 84,907,000  55,577,000 36,853,000 53,831,000 
          capital expenditures
        -123,534,000 -146,170,000 -139,697,000 -150,228,000 -166,917,000 -135,771,000 -180,338,000 -117,800,000 -225,677,000 -210,301,000 -183,225,000 -129,731,000 -107,544,000 -125,466,000 -131,959,000 -79,457,000 -91,962,000 -58,891,000 -34,264,000 -38,050,000 -18,362,000 -10,438,000 -14,860,000 -79,202,000 -79,293,000 -69,140,000 -74,034,000 -116,090,000 -129,105,000 -185,194,000 -177,272,000 -182,318,000 -60,433,000 -268,927,000 -128,080,000 -105,709,000 -47,143,000 -27,246,000 -21,076,000 -35,313,000 -7,238,000 -189,471,000 -242,350,000 -256,625,000 27,341,000 -101,570,000 -179,177,000 -164,335,000 -150,122,000 -244,190,000 -237,238,000 -260,850,000 -310,410,000 -293,520,000 -204,479,000 -165,331,000 -262,042,000 -219,274,000 -180,883,000 -46,703,000 -102,020,000 -104,077,000 -156,751,000 -89,798,000 -119,631,000 -153,100,000 -91,556,000 -84,606,000 -146,242,000 -135,852,000 -149,761,000 -175,831,000 -174,497,000 -166,675,000 -142,531,000 -114,216,000  -105,949,000 -81,149,000 -77,800,000  -47,112,000 -51,778,000 -37,945,000 
          free cash flows
        -59,676,000 251,356,000 76,106,000 -10,479,000 41,224,000 180,063,000 115,951,000 79,722,000 140,214,000 242,331,000 -27,149,000 33,126,000 126,805,000 177,475,000 46,271,000 -28,114,000 -58,288,000 -14,993,000 -26,863,000 -2,475,000 -9,740,000 -14,865,000 49,092,000 66,840,000 -6,002,000 43,222,000 144,508,000 65,377,000 54,727,000 56,730,000 11,239,000 -32,048,000 89,532,000 -99,481,000 -12,200,000 -95,881,000 -41,586,000 25,082,000 49,703,000 32,881,000 106,495,000 193,398,000 -24,093,000 235,676,000 162,635,000 162,393,000 -50,471,000 208,023,000 77,927,000 52,994,000 109,022,000 173,626,000 59,595,000 -21,200,000 49,643,000 231,804,000 2,815,000 -97,710,000 -72,896,000 57,687,000 7,776,000 -138,811,000 -110,388,000 24,952,000 41,043,000 -64,571,000 -42,617,000 -16,878,000 125,097,000 95,732,000 33,265,000 -137,000 97,251,000 21,788,000 61,758,000 -12,206,000 133,198,000 48,561,000 94,609,000 -24,842,000 120,923,000  59,830,000 -10,188,000 7,107,000  8,465,000 -14,925,000 15,886,000 
          cash flows from investing activities:
                                                                                                 
          purchases of property and equipment
        -116,628,000 -138,513,000 -144,479,000 -144,206,000 -161,831,000 -140,350,000 -180,587,000 -130,508,000 -226,941,000 -205,273,000 -160,422,000 -132,394,000 -117,601,000 -119,244,000 -126,355,000 -96,370,000 -94,828,000 -75,483,000 -34,264,000 -38,050,000 -18,523,000 -10,438,000 -13,442,000 -49,673,000 -71,928,000 -64,224,000 -68,028,000 -96,919,000 -118,341,000 -160,890,000 -162,785,000 -194,862,000 -122,921,000 -237,236,000 -143,061,000 -118,350,000 -68,440,000 -39,288,000 -28,677,000 -30,533,000 -21,301,000    -241,466,000    -170,372,000 -179,177,000 -150,686,000   -229,640,000 -232,283,000   -300,142,000 -283,818,000 -245,066,000 -182,552,000 -224,411,000 -214,834,000 -189,907,000 -108,938,000 -102,020,000 -104,077,000 -156,751,000 -89,798,000 -119,631,000 -153,100,000 -91,556,000 -84,606,000 -146,242,000 -135,852,000 -149,761,000 -175,831,000 -174,497,000 -166,675,000 -142,531,000 -114,216,000 -115,196,000 -105,949,000 -81,149,000 -77,800,000 -54,725,000 -47,112,000 -51,778,000 -37,945,000 
          proceeds from disposal of assets, including insurance recoveries
        12,220,000 10,962,000 4,811,000                                                                                       
          net cash from investing activities
        -106,026,000 -130,312,000 -147,634,000 -124,703,000 -164,504,000 -129,929,000 -175,311,000 -122,019,000 -227,485,000 -203,954,000 -571,424,000 -125,867,000 -116,345,000 -113,575,000 -121,458,000 -84,826,000 -93,368,000 -60,970,000 -28,973,000 -25,736,000 -15,915,000 -7,604,000 -3,036,000 -46,688,000 -67,648,000 -50,897,000 -67,110,000 -87,457,000 -96,300,000 -151,952,000 -155,782,000 -160,391,000 -116,427,000 -283,723,000 -140,906,000 -543,408,000 -42,579,000 -35,783,000 -22,488,000 -23,283,000 -16,201,000 -130,662,000 -139,395,000 -217,266,000 -235,639,000 -444,117,000 -278,245,000 -309,265,000 -163,782,000 -177,073,000 -146,997,000 -154,551,000 -173,454,000 -227,308,000 -227,533,000 -194,368,000 -258,752,000 -286,701,000 -282,238,000 -239,546,000 -155,098,000 -460,256,000 -212,841,000 -164,964,000 -66,004,000 -102,019,000 -101,486,000 -156,479,000 -89,357,000 -116,711,000 -148,832,000 -88,408,000 -83,325,000 -173,208,000 -130,465,000 -125,141,000 -173,648,000 -171,546,000 -162,956,000 -141,293,000 -111,190,000  -110,462,000 -84,113,000 -129,632,000  -46,467,000 -62,368,000 -69,199,000 
          cash flows from financing activities:
                                                                                                 
          purchases of treasury stock
        -350,000 -212,000 -33,575,000 -15,554,000 -20,295,000 -20,479,000 -39,746,000 -132,420,000 -97,782,000 -76,424,000 -23,371,000 -27,329,000 -73,586,000 -57,173,000 -12,884,000 -13,000 -2,754,000 -52,000   -50,000 -194,000 -910,000 -20,025,000 -25,192,000 -76,123,000 -79,039,000 -75,113,000 -50,082,000 -51,776,000 -42,951,000 -16,928,000 -3,082,000   1,000     -13,511,000 -43,000 -104,000 -63,375,000   -60,106,000 -38,849,000   -95,000 -3,000 -4,196,000 -20,000 -5,000 -415,000 -1,045,000 -388,000 -445,000 -962,000 -216,000 -15,959,000 -50,300,000 -4,212,000 -347,000 -20,158,000 -50,277,000    -152,395,000           
          dividends paid
        -37,960,000 -30,339,000 -30,495,000 -30,742,000 -30,877,000 -31,198,000 -31,225,000 -31,815,000 -32,553,000 -33,310,000 -33,217,000 -16,591,000 -16,916,000 -17,160,000 -8,673,000 -8,652,000 -8,611,000 -4,302,000 -3,780,000 -3,769,000 -3,754,000 -3,752,000 -3,746,000 -3,735,000 -7,629,000 -7,738,000 -7,847,000 -8,344,000 -8,499,000 -8,629,000 -8,685,000 -8,832,000 -4,443,000 -4,449,000 -4,271,000 -4,269,000 -3,326,000 -2,961,000 -2,953,000 -2,953,000 -14,712,000 -14,711,000 -14,712,000 -14,712,000 -14,640,000 -14,636,000 -14,634,000 -14,562,000 -14,456,000 -7,208,000 -7,231,000 -7,361,000 -7,312,000 -7,346,000 -7,518,000 -7,650,000 -7,788,000 -7,788,000 -7,777,000 -7,772,000 -7,708,000 -7,709,000 -7,704,000 -7,706,000 -7,677,000 -7,676,000 -7,675,000 -7,675,000 -7,655,000 -24,558,000 -24,803,000 -25,011,000 -18,493,000 -18,484,000 -18,690,000 -18,860,000 -12,527,000 -12,520,000 -12,986,000 -13,413,000 -6,906,000 -6,898,000 -6,904,000 -6,790,000 -6,747,000 -3,347,000 -3,338,000   
          payments of finance leases
        -1,959,000 -1,607,000 -1,784,000 -1,800,000 -2,632,000  -4,730,000 -4,676,000 -27,229,000                                                                                 
          net cash from financing activities
        -40,269,000 -32,158,000 -65,854,000 -53,847,000 -58,873,000 -63,660,000 -78,794,000 -170,949,000 -161,589,000 -122,744,000 330,570,000 -43,920,000 -98,339,000 -94,548,000 -33,673,000 3,464,000 -8,624,000 -57,056,000 -3,832,000 -7,291,000 -3,754,000 -66,766,000 -3,940,000 -4,790,000 -27,654,000 -52,045,000 -242,181,000 -87,383,000 -83,612,000 -58,731,000 -60,597,000 -51,918,000 228,110,000 119,674,000 21,647,000 107,004,000 468,244,000 -17,692,000 -221,310,000 -21,564,000 -24,712,000 -25,169,000 -22,883,000 -29,132,000 -122,080,000 286,027,000 -8,547,000 -9,746,000 -7,005,000 -9,809,000 -71,927,000 -12,979,000 -2,404,000 31,922,000 -52,284,000 20,813,000 -11,442,000 87,143,000 8,399,000 4,297,000 -8,244,000 290,820,000 81,553,000 -8,624,000 -7,902,000 -4,766,000 -8,965,000 -10,200,000 -13,973,000 -40,452,000 -74,775,000 8,865,000 -65,493,000 2,139,000 -73,587,000 -2,968,000 -131,840,000 -54,442,000 -100,492,000 -211,305,000 -6,906,000  6,081,000 15,214,000 563,000  -2,743,000 -3,166,000 7,046,000 
          effect of foreign exchange rate changes on cash, cash equivalents and restricted cash
        -961,000 -1,327,000 -1,293,000 -512,000 -853,000 3,566,000 -1,738,000 235,000 750,000 -302,000                                                                                
          net change in cash, cash equivalents and restricted cash
        -83,398,000 233,729,000                                                                                        
          cash, cash equivalents and restricted cash at beginning of period
        420,642,000  241,293,000  192,680,000                                                                                 
          cash, cash equivalents and restricted cash at end of period
        337,244,000  1,022,000 -39,313,000 225,204,000  40,446,000 -95,211,000 170,247,000                                                                                 
          supplemental disclosure of cash flow information:
                                                                                                 
          net cash received during the period for:
                                                                                                 
          interest, net of capitalized interest of 61 in 2026 and 315 in 2025
        -9,984,000                                                                                         
          income taxes
        15,401,000 -2,680,000 -2,336,000 -4,543,000 1,437,000 -439,000 -1,587,000 -12,358,000 -383,000 285,000 -9,788,000 -17,331,000 -335,000 -360,000 -286,000 -732,000 -148,000 -30,000 -30,000 4,256,000 159,000 3,952,000 -400,000 -2,000 -591,000 266,000 -1,112,000 -15,000 -105,000 3,256,000 21,000 81,000 2,899,000 719,000 248,000 7,729,000 25,384,000 -22,000 19,625,000 33,548,000 45,000 -19,395,000 83,135,000 -51,701,000 -20,163,000 -44,088,000 -10,001,000 -11,239,000 -18,123,000 -9,695,000 -3,543,000 156,000 -870,000 -5,860,000 -1,390,000 -782,000 -1,318,000 61,530,000 -179,000 5,000 -66,000 114,815,000 912,000 6,275,000 -321,000 7,811,000 264,000 -216,146,000 29,790,000 59,161,000 864,000 -310,087,000 37,047,000 93,707,000 3,052,000 -650,388,000 457,042,000 -163,220,000 -21,281,000  134,409,000 -47,185,000 -1,400,000  -8,500,000 -2,000,000 10,000,000 
          non-cash investing and financing activities:
                                                                                                 
          net decrease in payables for purchases of property and equipment
        -9,784,000 -14,937,000 5,017,000 -6,695,000 -5,420,000                  -1,418,000 -29,529,000 -7,365,000                          -13,649,000                                       
          purchases of property and equipment through exchange of lease right of use asset
        2,878,000 7,280,000 -235,000 673,000 334,000 4,579,000 249,000 26,133,000                                                                                
          derecognition of right of use asset
        -6,367,000 -7,258,000 -39,000 -421,000 -334,000 -4,579,000 -359,000 -31,179,000                                                                                
          impairment of goodwill
                            395,060,000                                                               
          net gain on asset disposals
           -264,000 -709,000         -1,517,000 -150,000 -9,295,000 -1,113,000 4,169,000 -1,543,000 -3,212,000 -840,000 278,000 -896,000 -1,222,000 -1,239,000 -2,751,000 -637,000 -3,971,000 -6,545,000 -7,772,000 -3,714,000 -7,062,000 -10,410,000 -14,431,000 -3,712,000 -1,807,000 -13,560,000 -4,963,000 -2,541,000 -4,822,000 -2,445,000 -3,337,000 -1,362,000 -2,998,000 -2,916,000 -7,076,000 -3,870,000   -1,098,000 -1,378,000   -1,111,000 -1,963,000 -28,332,000 -2,400,000  -1,437,000                               
          acquisitions, net of cash acquired - nextier
                                                                                                
          acquisitions, net of cash acquired - ulterra
                                                                                               
          investment in unconsolidated affiliate
                                                                                                
          proceeds from borrowings under revolving credit facility
                   60,000,000 45,000,000               79,000,000 317,000,000 121,000,000 151,000,000 10,000,000 105,500,000    54,000,000                                             
          repayment of borrowings under revolving credit facility
                   -60,000,000 -70,000,000               -347,000,000 -193,000,000 -92,000,000 -36,000,000 -10,000,000 -120,500,000    -357,000,000                                             
          proceeds from issuance of senior notes
                                                                                                
          repayment of senior notes
                 -7,837,000                                                                             
          cash, cash equivalents and restricted cash at beginning of year
                                                                                                 
          cash, cash equivalents and restricted cash at end of year
                                                                                                 
          net cash received during the year for:
                                                                                                 
          interest, net of capitalized interest of 734 in 2025, 1,334 in 2024, and 1,692 in 2023
                                                                                                 
          net decrease in deposits on equipment purchases
         -610,000    -4,716,000    662,000        933,000 -183,000 359,000 -242,000 3,012,000 1,948,000 54,000 1,336,000 -813,000 59,000 3,193,000 1,535,000 7,018,000 2,712,000   -1,324,000 -2,110,000 6,189,000 -3,056,000 1,650,000 270,000 425,000 3,972,000 -166,528,000 11,878,000 32,418,000 32,220,000  -34,170,000 -20,881,000 -4,677,000 -11,533,000 -11,040,000 5,926,000 7,863,000 11,005,000   1,900,000     -1,224,000                            
          issuance of common stock for business acquisitions
                                                                                                 
          net cash paid during the period for:
                                                                                                 
          interest, net of capitalized interest of 723 in 2025 and 938 in 2024
                                                                                                 
          net decrease in cash, cash equivalents and restricted cash
           -39,313,000 -16,089,000                                                                                     
          interest, net of capitalized interest of 443 in 2025 and 527 in 2024
                                                                                                 
          proceeds from disposal of assets
            4,342,000 11,147,000 5,364,000 6,932,000 2,389,000  11,774,000 6,529,000 1,263,000  4,959,000 11,770,000 3,576,000             19,349,000 7,003,000 10,711,000 10,294,000 21,273,000 4,675,000 9,136,000 25,861,000 3,505,000 6,034,000 7,250,000 5,100,000 4,894,000 5,192,000 4,901,000 5,827,000 10,734,000 7,508,000 8,401,000 6,590,000 2,104,000 3,689,000 3,886,000 707,000 2,332,000 4,750,000 54,294,000 4,651,000 13,441,000 1,580,000 5,520,000 1,954,000 2,185,000 1,993,000 24,943,000 288,000 55,000 2,591,000 272,000 441,000 2,920,000 4,268,000 3,148,000 1,281,000                 
          interest, net of capitalized interest of 315 in 2025 and 216 in 2024
            -23,998,000                                                                                     
          net increase in deposits on equipment purchases
            -4,196,000   4,790,000 -13,552,000   4,901,000 -6,072,000    -6,046,000                -2,294,000                         -18,611,000 -14,629,000 5,284,000 -20,503,000   -15,228,000 -16,798,000 -915,000                        
          payments on finance leases
                                                                                                 
          net increase in cash, cash equivalents and restricted cash
               -95,211,000 -22,433,000                                                                                 
          interest, net of capitalized interest of 1,334 in 2024, 1,692 in 2023, and 976 in 2022
                                                                                                 
          net increase in payables for purchases of property and equipment
               12,708,000 -24,869,000 -5,028,000 -22,803,000 2,663,000 10,057,000 -6,222,000 -5,604,000 16,913,000 2,866,000 16,592,000   161,000     -4,916,000 -6,006,000 -19,171,000 -10,764,000 -24,304,000 -14,487,000 12,544,000 62,488,000 -31,691,000 14,981,000 12,641,000 21,297,000 12,042,000 7,601,000 -4,780,000 14,063,000    -884,000         -14,550,000 -4,955,000   -10,268,000 -9,702,000 40,587,000 17,221,000 -37,631,000 -4,440,000 9,024,000 62,235,000                         
          cashless exercise of stock options
                                                                                             
          credit loss expense
              721,000 -273,000 5,231,000             4,551,000 1,055,000                                                                 
          interest, net of capitalized interest of 938 in 2024 and 1,350 in 2023
                                                                                                 
          issuance of common stock for business combinations
                                                                                                 
          interest, net of capitalized interest of 527 in 2024 and 836 in 2023
                                                                                                 
          interest, net of capitalized interest of 216 in 2024 and 351 in 2023
                -10,037,000                                                                                 
          gain on early debt extinguishment
                 -1,112,000                                                                             
          net cash from operating activities of discontinued operations
                                                                 -339,000 -297,000 10,687,000                         
          acquisitions, net of cash acquired - pioneer
                                                                                                 
          proceeds from disposal of assets and insurance claims
                         2,781,000 5,413,000 12,432,000 2,713,000 3,137,000 10,527,000 2,985,000 4,280,000 13,327,000 918,000 9,462,000 22,054,000                                                             
          net cash from investing activities of discontinued operations
                                                                 25,500,000 -8,000 42,646,000                         
          repayment of term loan
                                                                                                 
          debt issuance costs
                 -442,000            -439,000   -702,000    -20,000 -136,000 -135,000 -4,198,000        -39,000 -1,940,000         -50,000 -5,982,000       -451,000                            
          interest, net of capitalized interest of 1,692 in 2023, 976 in 2022, and 260 in 2021
                                                                                                 
          interest, net of capitalized interest of 1,350 in 2023 and 689 in 2022
                                                                                                 
          effect of foreign exchange rate changes on cash
                     1,391,000 -942,000 368,000 6,000 -10,000 276,000 -29,000 -16,000 17,000 26,000 -64,000 64,000 -14,000 -48,000 -244,000 -8,000 -304,000 -225,000 -408,000 1,086,000 100,000 234,000 -673,000 364,000 -277,000 391,000 -686,000 -3,141,000 311,000 -3,361,000 115,000 -1,605,000 1,420,000 -473,000 -416,000 1,326,000 -1,250,000 -551,000 -354,000 1,110,000 -775,000 408,000 159,000 -724,000 -3,000 293,000 -99,000 339,000 -152,000 167,000 -30,000 569,000 2,183,000 -500,000 -1,996,000 29,000 29,000 -146,000 -43,000 -517,000 1,099,000 4,000 -630,000 117,000 497,000 -37,000  -264,000 -281,000 87,000     
          net increase in cash and cash equivalents
                   -6,930,000 19,665,000     -73,760,000 -25,398,000   -78,826,000 56,960,000 94,581,000 -21,985,000 9,356,000 -90,685,000 6,613,000 3,872,000 30,997,000 -27,876,000 -62,343,000 261,423,000 4,989,000 -2,293,000 -426,476,000 431,456,000 -1,820,000 -172,655,000 23,070,000 73,211,000 36,881,000 -41,000 -10,411,000 43,905,000 4,418,000 -82,243,000 -136,909,000 8,237,000 44,873,000 55,759,000 4,846,000 33,308,000 27,250,000 8,174,000 57,474,000 -6,121,000  -53,939,000 26,914,000 10,058,000 -46,304,000 -22,063,000 32,095,000 14,007,000 -69,366,000 -48,422,000 -24,623,000 111,065,000 56,204,000 -37,213,000 11,905,000 32,893,000 -3,082,000 -6,959,000 10,545,000 3,545,000 -3,560,000 -2,047,000 -234,412,000 117,006,000      6,367,000   
          cash and cash equivalents at beginning of period
                   137,553,000  117,524,000  224,915,000  174,185,000  245,029,000  42,828,000  35,152,000  113,346,000  43,012,000  249,509,000  110,723,000  23,946,000  27,612,000  49,877,000  81,223,000  17,434,000  13,385,000  136,398,000  112,371,000  100,483,000 
          cash and cash equivalents at end of period
                   -6,930,000 157,218,000  23,099,000 -28,628,000 48,264,000  -25,398,000 2,538,000 214,144,000  56,960,000 94,581,000 152,200,000  -90,685,000 6,613,000 248,901,000  -27,876,000 -62,343,000 304,251,000  -2,293,000 -426,476,000 466,608,000  -172,655,000 23,070,000 186,557,000  -41,000 -10,411,000 86,917,000  -82,243,000 -136,909,000 257,746,000  55,759,000 4,846,000 144,031,000  8,174,000 57,474,000 17,825,000  -53,939,000 26,914,000 37,670,000  -22,063,000 32,095,000 63,884,000  -48,422,000 -24,623,000 192,288,000  -37,213,000 11,905,000 50,327,000  -6,959,000 10,545,000 16,930,000  -2,047,000 -234,412,000 253,404,000  61,134,000 1,781,000 68,296,000  6,413,000 -28,839,000 92,192,000 
          interest, net of capitalized interest of 836 in 2023 and 400 in 2022
                                                                                                 
          dry holes and abandonments
                    68,000 1,000 1,000 117,000 1,000 6,000 24,000 147,000 29,000 18,000 1,064,000 174,000 15,000 73,000 21,000 346,000 7,000 466,000 96,000 1,486,000 415,000       1,065,000 45,000 68,000 46,000 213,000 16,000 38,000 283,000 35,000 39,000 5,000 10,000 191,000 32,000 29,000 56,000 992,000 71,000 102,000 48,000 40,000 -7,000 136,000 350,000 9,000 2,000 -9,000 127,000 723,000 294,000 685,000 -85,000 478,000 45,000 87,000 699,000 629,000 608,000        -222,000   
          amortization of debt discount and issuance costs
                    396,000 209,000 210,000 209,000 207,000 219,000 208,000 207,000 205,000 239,000 226,000 219,000 228,000 269,000 225,000 222,000 221,000 223,000 220,000 217,000 170,000                                                         
          income taxes receivable/payable
                    1,520,000 1,952,000 1,677,000 100,000 442,000 138,000 9,000 96,000 4,273,000 350,000 3,948,000 -685,000 -1,978,000 -599,000 218,000 -2,958,000 -14,000           1,017,000 -3,346,000 -2,142,000 -41,490,000 -19,184,000 112,711,000   -27,653,000 14,180,000 10,033,000 2,894,000 -9,747,000 1,267,000 6,821,000 1,143,000 -10,265,000 5,807,000 1,600,000 2,269,000 71,417,000 2,332,000 -70,687,000 519,000 117,307,000 -3,617,000   4,747,000 -1,152,000 -9,001,000 17,666,000 -46,153,000 26,230,000                 
          inventory and other assets
                    -3,176,000 -1,964,000 5,481,000 -21,043,000 3,372,000 -7,336,000 7,909,000 -3,598,000 -2,825,000 4,942,000 5,327,000 8,531,000 8,392,000 -12,698,000 46,059,000 -10,559,000 6,592,000 6,552,000 17,255,000 -27,986,000 2,709,000 2,949,000 2,788,000 -39,117,000 9,931,000 -2,212,000 4,081,000 822,000 2,973,000 12,659,000 15,502,000 2,353,000 9,724,000 682,000 15,477,000 -24,409,000 2,513,000 -2,520,000 15,895,000 -19,477,000 6,672,000 -3,581,000 2,749,000 776,000 5,332,000 -2,866,000 3,094,000 -14,924,000 1,205,000 -1,908,000 6,419,000 -11,035,000 -2,248,000 -970,000 11,117,000 -1,795,000 5,826,000                    2,608,000 
          interest, net of capitalized interest of 351 in 2023 and 146 in 2022
                    -8,871,000                                                                             
          stock-based compensation expense
                     5,639,000 5,656,000 5,162,000 4,642,000 4,685,000 5,048,000 5,934,000 5,891,000 6,485,000 6,592,000 4,335,000 9,160,000 9,270,000 9,670,000 11,050,000 9,338,000 9,476,000 9,177,000 9,907,000 9,365,000 9,382,000 12,931,000 15,039,000 7,131,000 7,194,000 6,938,000 6,981,000 7,211,000 7,324,000 7,355,000 6,976,000 6,855,000 7,087,000 6,986,000 6,248,000 6,711,000 6,863,000 6,909,000 6,216,000 5,903,000 5,982,000 5,963,000 5,782,000 5,458,000 5,538,000 5,516,000 5,543,000 4,307,000 4,898,000 3,894,000 3,861,000 4,126,000 4,106,000 4,500,000 4,914,000 4,694,000 4,987,000 5,007,000 5,019,000 5,118,000                 
          net gain on insurance reimbursement
                                                                                               
          write-down of capacity reservation contract
                                                                                                
          restructuring expenses, non-cash
                             999,000 -6,818,000                                                                   
          acquisitions, net of cash acquired
                                 -13,000 -10,411,000                                                   -8,176,000 -3,610,000 -61,791,000 -32,514,000 
          cash and cash equivalents at beginning of year
                                                                                                 
          cash and cash equivalents at end of year
                                                                                                 
          interest, net of capitalized interest of 976 in 2022, 260 in 2021 and 431 in 2020
                                                                                                 
          net decrease in cash and cash equivalents
                      23,099,000 -28,628,000 -69,260,000    -10,771,000                                                               1,781,000 -44,075,000    -8,322,000 
          interest, net of capitalized interest of 689 in 2022 and 117 in 2021
                                                                                                 
          net loss
                       21,886,000 -28,777,000 -361,825,000 -82,998,000 -103,309,000 -106,413,000 -106,527,000 -112,111,000 -150,332,000 -434,722,000  -261,719,000 -49,447,000 -28,614,000  -75,042,000 -10,713,000 -34,417,000  -33,769,000 -92,184,000 -63,539,000  -84,143,000                                                   
          adjustments to reconcile net loss to net cash from operating activities:
                                                                                                 
          interest, net of capitalized interest of 400 in 2022 and 56 in 2021
                                                                                                 
          interest, net of capitalized interest of 146 in 2022 and 24 in 2021
                        -10,574,000                                                                         
          deferred income tax benefit
                         -8,226,000 -17,681,000 -16,100,000 -20,973,000 -25,071,000 -12,993,000 -19,025,000 -68,194,000 -23,704,000 -64,631,000   -16,568,000 -16,517,000   -226,156,000 -13,506,000 -53,737,000 -36,947,000  -50,402,000 -47,027,000 -11,616,000  -70,006,000                                               
          loss on early debt extinguishment
                                 15,776,000                                                                
          proceeds from long-term debt
                                 346,969,000    521,194,000         200,000,000                                             
          repayment of long-term debt
                                 -365,382,000            -230,000,000 -15,000,000 -10,000,000 -10,000,000 -7,500,000 -7,500,000 -2,500,000 -2,500,000 -2,500,000 -2,500,000 -2,500,000 -2,500,000 -1,250,000 -1,250,000 -1,250,000     -2,500,000 -1,250,000 -1,250,000 -1,250,000                             
          interest, net of capitalized interest of 260 in 2021, 431 in 2020 and 732 in 2019
                                                                                                 
          writedown of capacity reservation contract
                                                                                                
          interest, net of capitalized interest of 117 in 2021 and 425 in 2020
                                                                                                 
          interest, net of capitalized interest of 56 in 2021 and 406 in 2020
                                                                                                 
          receivable from property and equipment insurance
                                     15,000,000                                                         
          interest, net of capitalized interest of 24 in 2021 and 252 in 2020
                            -10,232,000                                                                     
          collection of note receivable
                                                                                               
          proceeds from exercise of stock options
                                                     116,000 8,461,000 14,232,000 8,033,000 -11,663,000 18,622,000 674,000 65,000 195,000 2,771,000 1,032,000 12,609,000 399,000 235,000 127,000 163,000 190,000 108,000 234,000 37,000 9,000 172,000 22,561,000 2,806,000 750,000 366,000 447,000 487,000  153,000    12,985,000       
          interest, net of capitalized interest of 431 in 2020, 732 in 2019 and 1,435 in 2018
                                                                                                 
          interest, net of capitalized interest of 425 in 2020 and 548 in 2019
                                                                                                 
          interest, net of capitalized interest of 406 in 2020 and 380 in 2019
                                                                                                 
          interest, net of capitalized interest of 252 in 2020 and 257 in 2019
                                -11,401,000                                                                 
          provision for bad debts
                                 2,089,000                           -500,000   1,600,000     -500,000       4,000,000                     
          accrued expenses
                                    2,871,000 -21,344,000 26,022,000 -11,716,000 11,174,000 -30,107,000 28,919,000 -9,769,000 -3,233,000 -16,957,000 14,042,000 -14,462,000 -7,196,000 -17,577,000 9,168,000 -7,453,000 5,559,000 -9,576,000 10,292,000 13,770,000 -1,648,000 6,868,000 7,558,000 5,245,000 -17,698,000 1,982,000 3,232,000 972,000 -12,234,000 11,853,000 -5,403,000 17,212,000 -5,349,000 -155,000 1,889,000 18,970,000 -2,632,000 2,706,000 229,000 227,000 -24,340,000 -7,735,000 17,945,000 -189,000 -13,771,000 4,992,000 7,768,000 2,704,000 -21,568,000 9,174,000 11,839,000 5,116,000 6,843,000  17,606,000 -182,000 5,238,000  7,917,000 -786,000 -12,547,000 
          other investments
                                                                                                
          proceeds from equity offering
                                         471,570,000                                                     
          interest, net of capitalized interest of 732 in 2019, 1,435 in 2018 and 1,175 in 2017
                                                                                                 
          proceeds from exercise of options
                                      485,000                                                         
          interest, net of capitalized interest of 548 in 2019 and 1,094 in 2018
                                                                                                 
          interest, net of capitalized interest of 380 in 2019 and 722 in 2018
                                                                                                 
          interest, net of capitalized interest of 257 in 2019 and 340 in 2018
                                    -10,689,000                                                             
          tax expense related to stock-based compensation
                                                             -78,000 2,000       244,000 -1,051,000 -1,251,000 -233,000                         
          interest, net of capitalized interest of 1,435 in 2018, 1,175 in 2017 and 398 in 2016
                                                                                                 
          income taxes receivable
                                      3,297,000 -41,000 19,000  2,640,000 -1,389,000 248,000                                                     
          proceeds of equity offering
                                                                                                 
          interest, net of capitalized interest of 1,094 in 2018 and 781 in 2017
                                                                                                 
          interest, net of capitalized interest of 722 in 2018 and 409 in 2017
                                                                                                 
          acquisition
                                        -3,800,000                                                         
          interest, net of capitalized interest of 340 in 2018 and 155 in 2017
                                        -2,206,000                                                         
          amortization of debt issuance costs
                                         86,000 87,000 86,000 87,000 86,000 1,461,000 361,000 362,000                                                 
          interest, net of capitalized interest of 1,175 in 2017, 398 in 2016 and 6,332 in 2015
                                                                                                 
          issuance of common stock for business acquisition
                                         187,494,000                                                      
          tax expense on stock-based compensation
                                              -1,900,000                                                   
          acquisition, net of cash acquired
                                                                                                
          interest, net of capitalized interest of 781 in 2017 and 327 in 2016
                                                                                                 
          interest, net of capitalized interest of 409 in 2017 and 286 in 2016
                                                                                                 
          interest, net of capitalized interest of 155 in 2017 and 185 in 2016
                                            -634,000                                                     
          acquisitions
                                                                                                 
          tax benefit related to stock-based compensation
                                                  -671,000   47,000 126,000 6,595,000 1,961,000 3,000 -71,000 2,125,000 2,737,000    166,000 555,000 597,000 4,906,000 335,000        -591,000 56,000 156,000 15,527,000 541,000  14,000               
          interest, net of capitalized interest of 398 in 2016, 6,332 in 2015 and 6,883 in 2014
                                                                                                 
          cash acquired in acquisition
                                                                                                 
          interest, net of capitalized interest of 327 in 2016 and 4,946 in 2015
                                                                                                 
          interest, net of capitalized interest of 286 in 2016 and 3,343 in 2015
                                                                                                 
          tax expense on stock based compensation
                                                -323,000    -34,000                                             
          interest, net of capitalized interest of 185 in 2016 and 1,667 in 2015
                                                -3,773,000                                                 
          interest, net of capitalized interest of 6,332 in 2015, 6,883 in 2014 and 7,775 in 2013
                                                                                                 
          purchases of property and equipment and acquisitions
                                                  -144,587,000    -285,753,000                                           
          interest, net of capitalized interest of 4,946 in 2015 and 5,268 in 2014
                                                                                                 
          net increase in payables for purchase of property and equipment
                                                  -44,884,000              2,553,000                                 
          interest, net of capitalized interest of 3,343 in 2015 and 3,326 in 2014
                                                                                                 
          interest, net of capitalized interest of 1,592 in 2015 and 1,667 in 2014
                                                    -783,000                                             
          benefit from bad debts
                                                                         -2,890,000 700,000   2,500,000 1,250,000 300,000 300,000 950,000 600,000 400,000 600,000 1,200,000 3,000,000 600,000 600,000 815,000 50,000 143,000 223,000 398,000 192,000 217,000 90,000 
          net cash paid during the year for:
                                                                                                 
          interest, net of capitalized interest of 6,883 in 2014, 7,775 in 2013 and 8,673 in 2012
                                                                                                 
          adjustments to reconcile net income to net cash provided by operating activities:
                                                                                                 
          income taxes payable
                                                                                        55,452,000  20,840,000 -15,720,000 23,253,000     
          interest, net of capitalized interest of 5,268 in 2014 and 6,016 in 2013
                                                                                                 
          supplemental non-cash investing and financing information:
                                                                                                 
          net increase in current liabilities for purchases of property and equipment
                                                      29,128,000 27,341,000 68,802,000                                         
          interest, net of capitalized interest of 3,326 in 2014 and 4,358 in 2013
                                                                                                 
          interest, net of capitalized interest of 1,667 in 2014 and 2,281 in 2013
                                                                                                 
          supplemental investing and financing information:
                                                                                                 
          interest, net of capitalized interest of 7,775 in 2013, 8,673 in 2012 and 8,415 in 2011
                                                                                                 
          proceeds from senior notes
                                                                                                
          proceeds from borrowing under revolving credit facility
                                                              68,900,000 54,500,000                                 
          repayment of borrowing under revolving credit facility
                                                              -177,400,000 -56,000,000                                 
          interest, net of capitalized interest of 6,016 in 2013 and 6,391 in 2012
                                                                                                 
          interest, net of capitalized interest of 4,358 in 2013 and 4,065 in 2012
                                                                                                 
          purchase of property and equipment
                                                            -174,161,000    -263,403,000                                 
          purchase of treasury stock
                                                            -15,201,000    -15,000                               
          interest, net of capitalized interest of 2,281 in 2013 and 1,968 in 2012
                                                                                                 
          net increase in current liabilities for purchase of property and equipment
                                                            24,039,000                                     
          interest, net of capitalized interest of 8,673 in 2012, 8,415 in 2011 and 2,288 in 2010
                                                                                                 
          repayment of other long-term debt
                                                              -90,000,000 -2,500,000                                 
          interest, net of capitalized interest of 6,391 in 2012 and 6,575 in 2011
                                                                                                 
          net cash (paid) received during the period for:
                                                                                                 
          interest, net of capitalized interest of 4,065 in 2012 and 4,468 in 2011
                                                                                                 
          interest, net of capitalized interest of 1,968 in 2012 and 2,043 in 2011
                                                                -364,000                                 
          net (gain) loss on asset disposals
                                                                                                 
          net cash (paid) received during the year for:
                                                                                                 
          interest, net of capitalized interest of 8,415 in 2011, 2,288 in 2010 and 0 in 2009
                                                                                                 
          borrowings under revolving credit facility
                                                                                                 
          interest expense, net of capitalized interest of 6,575 in 2011 and 0 in 2010
                                                                                                 
          interest expense, net of capitalized interest of 4,468 in 2011 and 0 in 2010
                                                                                                 
          interest expense, net of capitalized interest of 2,043 in 2011 and 0 in 2010
                                                                                                 
          proceeds from long term debt
                                                                     300,000,000                            
          repayment of long term debt
                                                                                                 
          interest expense, net of capitalized interest of 2,288 in 2010, 0 in 2009 and 0 in 2008
                                                                                                 
          depreciation, depletion and impairment
                                                                      85,431,000 78,783,000 75,716,000 80,512,000 70,131,000 68,857,000 70,347,000  67,998,000 65,673,000 63,726,000 66,805,000 66,523,000 59,947,000 55,931,000 56,125,000 49,215,000 47,481,000 43,549,000 45,818,000 39,216,000 36,959,000 34,400,000     
          interest expense
                                                                      -1,298,000 -33,000 -1,700,000 -364,000 -923,000 -532,000 15,000 -785,000 18,000 157,000 287,000 -3,569,000 567,000 535,000 659,000 -1,754,000 589,000 -55,000 -58,000  302,000 -57,000 -66,000     
          line of credit issuance costs
                                                                          -621,000 -5,548,000                     
          net income on asset disposals
                                                                        249,000                         
          revolving credit facility issuance costs
                                                                                                 
          net gain on asset disposals/retirements
                                                                          -898,000                       
          tax benefit (expense) related to stock-based compensation
                                                                          -953,000                       
          repayment of borrowings under line of credit
                                                                             -50,000,000 -10,000,000 -15,000,000 -51,500,000 -136,000,000             
          net loss on asset disposals/retirements
                                                                            174,000                     
          goodwill impairment
                                                                                                 
          depreciation, depletion and other impairment
                                                                                                 
          inventory and other current assets
                                                                             783,000 7,621,000 -5,689,000 2,777,000 -7,706,000 -1,793,000 7,267,000 7,085,000 -11,320,000   -3,266,000  2,946,000 -7,770,000 780,000  -4,791,000   
          proceeds from borrowings under line of credit
                                                                                 50,000,000 10,000,000 66,500,000 16,000,000 209,000,000            
          gain on disposal of assets
                                                                              -505,000    -330,000               
          embezzlement recovery receivable
                                                                                                 
          loss on disposal of assets
                                                                                186,000                 
          stock based compensation expense
                                                                                 5,385,000 5,563,000 4,827,000 3,589,000 5,469,000 3,344,000 3,524,000 2,842,000         
          (gain) loss on disposal of assets
                                                                                    202,000             
          change in other assets
                                                                                         1,766,000     
          income taxes payable/receivable
                                                                                  307,000 -40,523,000 46,950,000  17,350,000           
          proceeds from disposal of property and equipment
                                                                                  5,387,000 24,620,000 2,183,000 2,951,000 3,719,000           
          tax benefit related to exercise of stock options
                                                                                    200,000     701,000 6,777,000 12,131,000 5,139,000 3,984,000 -1,714,000 702,000 7,694,000 
          changes in operating assets and liabilities, net of business acquired:
                                                                                                 
          federal income taxes receivable/payable
                                                                                                 
          repayments on line of credit
                                                                                                 
          proceeds from exercise of stock options and warrants
                                                                                            7,310,000 15,226,000 595,000 1,652,000 7,046,000 
          acquisitions, net of cash received
                                                                                                 
          (gain) loss on sale of assets
                                                                                        -871,000    90,000     
          proceeds from sales of property and equipment
                                                                                        3,026,000 172,000 3,663,000   672,000 645,000 726,000 1,260,000 
          amortization of deferred compensation expense
                                                                                         704,000 1,013,000 632,000 476,000     
          gain on sale of assets
                                                                                         330,000 -530,000       
          cumulative effect of change in accounting principle, net of tax
                                                                                                 
          net cash received (paid) during the year for:
                                                                                                 
          restricted cash deposited to collateralize retained insurance losses
                                                                                                
          net cash received (paid) during the period for:
                                                                                                 
          proceeds from sales and pending sales of property and equipment
                                                                                            8,193,000     
          purchase of investment equity securities
                                                                                                 
          amortization of deferred compensation
                                                                                              486,000   
          gain on sale of property and equipment
                                                                                              -153,000 -187,000 -1,188,000 
          changes in operating assets and liabilities, net of acquired assets and liabilities assumed:
                                                                                                 
          federal and state income taxes
                                                                                              4,872,000   
          foreign currency translation adjustment
                                                                                              46,000 -158,000 31,000 
          interest
                                                                                              -75,000 -206,000 76,000 
          depreciation, depletion and amortization
                                                                                                27,283,000 
          federal and state income taxes receivable
                                                                                                5,696,000 
          depreciation, depletion, and amortization
                                                                                                 
          proceeds from issuance of notes payable
                                                                                                 
          payments of notes payable