7Baggers

Helmerich & Payne, Inc
(NYSE:HP) 

HP stock logo

Helmerich & Payne, Inc., together with its subsidiaries, provides drilling services and solutions for exploration and production companies. The company operates through three segments: North America Solutions, Offshore Gulf of Mexico, and International Solutions. The North America Solutions segment ...

Founded: 1920
Full Time Employees: 4,138
Sector: Energy
Industry: Oil & Gas Drilling

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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 2016-06-30 2016-03-31 2015-12-31 2015-06-30 2015-03-31 2014-12-31 2014-06-30 2014-03-31 2013-12-31 2013-06-30 2013-03-31 2012-12-31 2012-06-30 2012-03-31 2011-12-31 2011-06-30 2011-03-31 2010-12-31 2010-06-30 2010-03-31 2009-12-31 2009-06-30 2009-03-31 2008-12-31 2008-06-30 2008-03-31 2007-12-31 2007-06-30 2007-03-31 2006-12-31 2006-06-30 2006-03-31 2005-12-31 2005-06-30 2005-03-31 2004-12-31 2004-06-30 2004-03-31 2003-12-31 2003-09-30 
                                                                                  
      operating revenues
                                                                              147,498,000 143,463,000 134,870,000  
      drilling services
    906,426,000 981,125,000 953,777,000 1,037,876,000 1,012,394,000 674,613,000 691,293,000 695,139,000 685,131,000 674,565,000 657,258,000 721,567,000 766,682,000 717,170,000 629,031,000 547,906,000 465,370,000 407,534,000 342,219,000 329,774,000 294,026,000 244,781,000                                                         
      other
    25,936,000 35,901,000 57,971,000 3,048,000 3,645,000 2,689,000 2,500,000 2,585,000 2,812,000 2,582,000 2,348,000 2,389,000 2,540,000 2,467,000 2,301,000 2,327,000 2,227,000 2,248,000 1,588,000 2,439,000 2,145,000 1,596,000 2,646,000 2,959,000 3,349,000 3,259,000 3,291,000 3,186,000 3,215 3,240,000 11,713,000 11,324,000 9,313,000 5,867,000 5,286,000 4,262,000 3,324,000 3,111,000 2,983,000 3,231,000 3,968,000 3,208,000 3,741,000 4,180,000 3,987,000 2,830,000 3,083,000 3,544,000 2,902,000 3,557,000 3,900,000 3,669,000 3,282,000 4,103,000 3,677,000 4,003,000 3,219,000 2,840,000 3,086,000 2,514,000 2,626,000 2,884,000 2,879,000 180,000  120,000 66,000 64,000 1,085,000 27,000 -513,000 29,000 348,000 -2,000     
      operating revenues - sum
    932,362,000 1,017,026,000 1,011,748,000 1,040,924,000 1,016,039,000 677,302,000 693,793,000 697,724,000 687,943,000 677,147,000 659,606,000 723,956,000 769,222,000 719,637,000 631,332,000 550,233,000 467,597,000 409,782,000 343,807,000 332,213,000 296,171,000 246,377,000 208,267,000 317,364,000 633,639,000 614,657,000 649,050,000 687,974,000                                                   
      operating costs and expenses
                                                                                  
      drilling services operating expenses, excluding depreciation and amortization
    661,180,000 682,780,000 694,611,000 704,224,000 701,657,000 411,857,000 408,043,000 417,028,000 401,851,000 403,303,000 408,555,000 429,182,000 449,110,000 428,251,000 410,968,000 376,210,000 339,759,000 299,652,000 268,127,000 255,471,000 230,313,000 198,689,000                                                         
      other operating expenses
    24,799,000 31,260,000 20,319,000 31,059,000 3,485,000 1,156,000 1,176,000 1,144,000 1,026,000 1,137,000 1,160,000 1,003,000 1,188,000 1,126,000 1,222,000 1,053,000 1,181,000 1,182,000 1,021,000 1,481,000 1,274,000 1,362,000 1,491,000 1,549,000 1,315,000 11,545,000                                                     
      depreciation and amortization
    180,734,000 181,919,000 188,857,000 179,491,000 157,657,000 99,080,000 100,992,000 97,816,000 104,545,000 93,991,000 94,593,000 94,811,000 96,255,000 96,655,000 99,055,000 100,741,000 102,937,000 100,437,000 101,955,000 104,493,000 106,417,000 106,861,000 109,587,000 110,161,000 132,006,000 130,131,000 134,886,000 143,297,000 143,161 141,460,000 150,281,000 144,579,000 145,675,000 143,267,000                                             
      research and development
    7,016,000 6,646,000 7,567,000 7,777,000 9,421,000 9,359,000 8,862,000 10,555,000 12,942,000 8,608,000 7,326,000 7,085,000 8,702,000 6,933,000 7,138,000 6,511,000 6,387,000 6,527,000 5,197,000 5,610,000 5,334,000 5,583,000 4,915,000 3,638,000 6,214,000 6,878,000 6,120,000 7,066,000 7,262 7,019,000 5,018,000 5,479,000 4,436,000 3,234,000 3,462,000 3,058,000 2,719,000 2,808,000 2,707,000 2,315,000 2,919,000 3,329,000 4,857,000 4,158,000 3,864,000 3,625,000 4,257,000 4,373,000 3,696,000 3,353,000 4,299,000 3,830,000 3,249,000 4,399,000 3,640,000 3,470,000 3,254,000 3,342,000 1,815,000 2,777,000 2,176,000 1,677,000 522,000                
      selling, general and administrative
    71,080,000 70,444,000 77,645,000 65,506,000 80,802,000 63,062,000 59,393,000 66,870,000 62,037,000 56,577,000 56,076,000 49,271,000 52,855,000 48,455,000 46,667,000 44,933,000 47,051,000 43,715,000 51,824,000 41,719,000 39,349,000 39,303,000 32,619,000 43,108,000 41,978,000 49,808,000 49,812,000 46,590,000 43,506 54,508,000                                                 
      acquisition transaction and integration costs
    2,738,000                                                                              
      asset impairment charges
    26,101,000 103,086,000 18,928,000 173,258,000 1,844,000         12,097,000                                                                 
      restructuring charges
    2,882,000 1,591,000 7,450,000 4,681,000            33,000 63,000 742,000 2,070,000 2,110,000 1,608,000 138,000 552,000 15,495,000                                                       
      gain on reimbursement of drilling equipment
    -5,943,000 -6,120,000 -7,249,000 -6,773,000 -9,973,000 -9,403,000 -8,622,000 -9,732,000 -7,461,000 -7,494,000 -10,233,000 -10,642,000 -11,574,000 -15,724,000 -7,846,000 -9,895,000 -6,448,000 -5,254,000                                                             
      other loss on sale of assets
    -1,305,000 1,926,000 -595,000 1,347,000 -884,000 1,673,000 2,421,000 2,730,000 2,431,000  8,410,000 4,504,000 -2,519,000 -2,379,000 -2,670,000 -3,075,000 -716,000 1,029,000                                                             
      operating costs and expenses - sum
    969,282,000 1,076,937,000 1,013,210,000 1,169,193,000 973,876,000 587,319,000 587,247,000 586,411,000 577,371,000 553,679,000 565,887,000 575,214,000 594,017,000 575,414,000 554,534,000 516,511,000 490,214,000 452,393,000 440,843,000 409,580,000 457,094,000 339,600,000 283,697,000 374,948,000 1,152,180,000 583,289,000 610,029,000 855,848,000                                                   
      operating income
    -36,920,000 -59,911,000 -1,462,000 -128,269,000 42,163,000 89,983,000 106,546,000 111,313,000 110,572,000 123,468,000                                                79,544,000 102,386,000 91,432,000 183,338,000 222,420,000 177,807,000 155,670,000 168,633,000 154,672,000 164,284,000 146,654,000 114,137,000 100,251,000 79,931,000 50,818,000 37,586,000 30,919,000     
      yoy
    -187.56% -166.58% -101.37% -215.23% -61.87% -27.12%                                                    -64.24% -42.42% -41.27% 8.72% 43.80% 8.23% 6.15% 47.75% 54.28% 105.53% 188.59% 203.67% 224.24%         
      qoq
    -38.38% 3997.88% -98.86% -404.22% -53.14% -15.55% -4.28% 0.67% -10.44%                                                 -22.31% 11.98% -50.13% -17.57% 25.09% 14.22% -7.69% 9.03% -5.85% 12.02% 28.49% 13.85% 25.42% 57.29% 35.20% 21.56%      
      other income
                                                                                  
      interest and dividend income
    2,155,000 2,758,000 3,353,000 2,856,000 7,257,000 21,741,000 11,979,000 11,888,000 6,567,000 10,734,000 7,885,000 10,748,000 5,055,000 4,705,000 6,789,000 5,313,000 3,399,000 2,589,000 2,029,000 1,527,000 4,819,000 1,879,000 753,000 771,000 3,566,000 2,214,000 2,607,000 2,349,000 2,061 2,450,000 2,337,000 2,109,000 1,847,000 1,724,000 1,887,000 1,700,000 1,338,000 990,000 778,000 799,000 733,000 1,602,000 2,549,000 285,000 373,000 490,000 453,000 341,000 315,000 426,000 329,000 356,000 336,000 903,000 356,000 314,000 940,000 329,000 439,000 542,000 2,150,000 1,786,000 1,034,000 1,220,000 1,115,000 962,000 1,034,000 1,244,000 2,633,000 2,456,000 2,530,000 1,671,000 1,193,000 961,000     
      interest expense
    -25,814,000 -25,607,000 -27,972,000 -29,200,000 -28,338,000 -22,298,000 -16,124,000 -4,336,000 -4,261,000 -4,372,000 -4,365,000 -4,324,000 -4,239,000 -4,355,000 -4,327,000 -4,372,000 -4,390,000 -6,114,000 -6,094,000 -5,963,000 -5,759,000 -6,139,000 -6,154,000 -6,125,000 -6,095,000 -6,100,000 -8,043,000 -6,257,000 -6,167 -4,720,000 -6,471,000 -5,993,000 -6,028,000 -5,773,000 -2,244,000 -6,364,000 -6,084,000                                  -2,580,000 -3,127,000 -3,246,000 -3,309,000     
      gain on investment securities
    14,391,000 929,000 -36,461,000 -337,000 27,788,000  13,851,000 389,000 3,747,000  5,176,000 -18,538,000 39,752,000 -15,091,000 2,253,000 -14,310,000 22,132,000 47,862,000 -1,126,000 2,409,000 2,520,000 2,924,000 -1,395,000 2,267,000 -12,413,000 2,821,000   5,878                                                  
      foreign currency exchange gain
    2,952,000 27,000                                                                             
      other income - sum
    -9,643,000 -23,819,000 -60,610,000 -4,639,000 2,285,000 -13,564,000 9,808,000 11,075,000 6,453,000 1,785,000 19,865,000 -12,799,000 39,825,000 -15,401,000 -4,234,000 -14,517,000 20,665,000 -16,288,000 -7,821,000 -2,997,000 1,003,000 -2,816,000 -8,469,000 -6,001,000 -15,340,000 13,499,000 -10,241,000 -18,778,000                                                   
      income before income taxes
    -46,563,000 -83,730,000 -62,072,000 -132,908,000 44,448,000 76,419,000 116,354,000 122,388,000 117,025,000 125,253,000                                                                     
      income tax expense
    9,298,000 11,201,000 -6,265,000 28,991,000 41,462,000 21,647,000 40,878,000 33,703,000 32,194,000 30,080,000 35,092,000 40,663,000 51,129,000 32,395,000 27,532,000 1,730,000 2,672,000                                                              
      net income
    -55,861,000 -94,931,000 -55,807,000 -161,899,000 2,986,000 54,772,000 75,476,000 88,685,000 84,831,000 95,173,000 77,622,000 95,293,000 164,040,000 97,145,000 45,539,000 17,752,000 -4,976,000 -51,362,000 -79,161,000 -55,555,000 -121,003,000 -70,431,000 -58,963,000 -45,599,000 -420,540,000 30,605,000 41,177,000 -154,683,000 60,891 18,959,000 2,453,000 -8,008,000 -11,879,000 500,106,000 -22,532,000 -21,799,000 -48,818,000 -35,063,000 -21,200,000 21,205,000 16,002,000 90,860,000 149,537,000 203,042,000 192,279,000 174,570,000 173,182,000 266,159,000 151,080,000 159,603,000 149,925,000 129,719,000 144,286,000 109,826,000 98,790,000 104,150,000 -36,715,000 46,747,000 63,235,000 53,044,000 103,738,000 145,275,000 125,369,000 102,054,000 107,830,000 115,204,000 106,861,000 110,786,000 79,975,000 64,573,000 50,814,000 29,825,000 22,350,000 39,310,000 4,347,000 6,048,000 5,629,000  
      yoy
    -1970.76% -273.32% -173.94% -282.56% -96.48% -42.45% -2.76% -6.93% -48.29% -2.03% 70.45% 436.80% -3396.62% -289.14% -157.53% -131.95% -95.89% -27.07% 34.26% 21.83% -71.23% -330.13% -243.19% -70.52% -690743.94% 61.43% 1578.64% 1831.61% -100.51% -96.21% -110.89% -63.26% -75.67% -1526.31% 6.28% -202.80% -405.07% -138.59% -114.18% -89.56% -91.68% -47.95% -13.65% -23.71% 27.27% 9.38% 15.51% 105.18% 4.71% 45.32% 51.76% 24.55% -492.99% 134.94% 56.23% 96.35% -135.39% -67.82% -49.56% -48.02% -3.79% 26.10% 17.32% -7.88% 34.83% 78.41% 110.30% 271.45% 257.83% 64.27% 1068.94% 393.14% 297.05%      
      qoq
    -41.16% 70.11% -65.53% -5521.94% -94.55% -27.43% -14.89% 4.54% -10.87% 22.61% -18.54% -41.91% 68.86% 113.32% 156.53% -456.75% -90.31% -35.12% 42.49% -54.09% 71.80% 19.45% 29.31% -89.16% -1474.09% -25.67% -126.62% -254132.62% -99.68% 672.89% -130.63% -32.59% -102.38% -2319.54% 3.36% -55.35% 39.23% 65.39% -199.98% 32.51% -82.39% -39.24% -26.35% 5.60% 10.14% 0.80% -34.93% 76.17% -5.34% 6.46% 15.58% -10.10% 31.38% 11.17% -5.15% -383.67% -178.54% -26.07% 19.21% -48.87% -28.59% 15.88% 22.85% -5.36% -6.40% 7.81% -3.54% 38.53% 23.85% 27.08% 70.37% 33.45% -43.14% 804.30% -28.13% 7.44%   
      net income attributable to non-controlling interest
    2,748,000 1,775,000 1,556,000 859,000 1,332,000                                                                          
      net income attributable to helmerich & payne, inc.
    -58,609,000 -96,706,000 -57,363,000 -162,758,000 1,654,000                                                                          
      earnings per share attributable to helmerich & payne, inc.:
                                                                                  
      basic
    -0.59 -0.98 -0.58 -1.64 0.01                                                                          
      diluted
    -0.59 -0.98 -0.58 -1.64 0.01                                                                          
      weighted-average shares outstanding:
                                                                                  
      basic
    99,878 99,544 99,272 99,422 99,360 98,867,000 98,857,000 98,752,000 98,774,000 99,143,000 102,447,000 101,163,000 103,968,000 105,248,000 105,891,000 105,289,000 105,393,000 107,571,000 107,818,000 107,896,000 107,861,000 107,617,000 108,009,000 107,439,000 108,557,000 108,555,000 109,216,000 109,425,000 109,406 109,142,000 108,851,000 108,905,000 108,868,000 108,683,000 108,500,000 108,572,000 108,565,000 108,276,000 108,047,000 108,014,000 107,852,000 107,652,000 107,646,000 107,973,000 108,137,000 107,692,000 107,149,000 106,430,000 106,326,000 105,867,000 107,016,000 107,385,000 107,186,000 106,962,000 106,515,000 106,031,000 105,743,000 105,711,000 105,575,000  105,317,000 105,249,000 104,530,000 103,883,000 103,509,000 103,323,000 103,239,000 103,312,000 105,019,000 52,314,000 51,993,000 51,233,000 50,955,000 50,543,000     
      diluted
    99,878 99,544 99,272 99,422 99,381 99,159,000 99,067,000 99,007,000 99,046,000 99,628,000 102,852,000 101,550,000 104,363,000 106,104,000 106,555,000 106,021,000 105,393,000 107,571,000 107,818,000 107,896,000 107,861,000 107,617,000 108,009,000 107,439,000 108,557,000 108,724,000 109,216,000 109,425,000 109,503 109,425,000 109,387,000 108,905,000 108,868,000 109,095,000 108,500,000 108,572,000 108,565,000 108,276,000 108,047,000 108,466,000 108,409,000 108,469,000 108,370,000 108,843,000 109,285,000 109,081,000 108,577,000 107,826,000 107,786,000 107,412,000 108,425,000 109,042,000 108,788,000 108,784,000 108,595,000 107,852,000 107,444,000 107,484,000 107,238,000  106,372,000 106,431,000 106,689,000 106,090,000 105,615,000 105,313,000 104,832,000 104,776,000 106,419,000 53,057,000 53,087,000 52,236,000 51,891,000 51,256,000     
      acquisition transaction costs
     3,405,000 5,677,000 8,623,000 29,867,000 10,535,000                                                                         
      foreign currency exchange loss
      6,455,000 -9,216,000 -6,018,000                                                                          
      loss on investment securities
         -13,367,000    -4,034,000                 -12,557,000 -13,271,000  -42,844,000                                                 
      basic earnings per common share
         550 750 890 850 950                                                                     
      diluted earnings per common share:
         540 667.5 880 840 940                                                                     
      other gain on sale of assets
             -2,443,000                                                                     
      operating income from continuing operations
              117,042,500 148,742,000 175,205,000 144,223,000 76,798,000 33,722,000      -93,223,000   -518,541,000 31,368,000 39,021,000 -167,874,000 95,146 54,289,000 23,118,000 6,217,000 -1,253,000 3,520,000 -29,677,000 -28,028,000 -65,672,000   41,621,000 38,670,000 132,780,000 227,172,000 331,819,000 271,912,000 255,342,000 264,031,000 239,960,000 232,920,000 240,547,000 232,655,000 207,025,000 230,539,000 174,418,000 164,265,000 170,726,000 111,474,000                      
      loss on extinguishment of debt
                     -60,083,000                                                             
      income from continuing operations before income taxes
              119,948,750 135,943,000 215,030,000 128,822,000 72,564,000 19,205,000      -96,039,000   -533,881,000 44,867,000 28,780,000 -186,652,000 96,935 9,716,000 19,034,000 2,361,000  1,000 -27,909,000 -33,603,000 -70,244,000   37,352,000 34,618,000 127,843,000 227,305,000 331,857,000 295,078,000 275,427,000 262,945,000 390,365,000 232,152,000 246,333,000 230,882,000 204,918,000 228,435,000 172,823,000 159,340,000 166,755,000                       
      income from continuing operations
              88,902,000 95,280,000 163,901,000 96,427,000 45,032,000 17,475,000      -77,924,000   -420,468,000 30,729,000 41,890,000 -154,621,000 71,857 8,364,000 2,175,000 -8,174,000 -1,633,000 500,642,000 -21,711,000 -23,125,000 -48,473,000 -330 -200 25,174,000 15,898,000 90,887,000 149,536,000 203,057,000 192,290,000 174,589,000 173,182,000 250,978,000 151,067,000 159,611,000 149,943,000 129,763,000 144,297,000 109,828,000 98,961,000 104,365,000 64,883,000                      
      income from discontinued operations before income taxes
              217,500 13,000 139,000 718,000 507,000 277,000 -352,000 -31,000 373,000 1,150,000 2,293,000 7,493,000 7,905,000 9,151,000 6,067,000 7,457,000 10,050,000 7,244,000 2,889 12,665,000 14,262,000 8,383,000 1,263,000  580,000 3,223,000 -94,000  2,193,000  104,000     2,786,000  15,181,000                               
      income from discontinued operations
              217,500 13,000 139,000 718,000 507,000 277,000 -352,000 -31,000 373,000 1,150,000 2,293,000 7,493,000 1,683,000 408,000  -124,000 -108,250 -62,000  10,595,000 -2,654,000 166,000   -821,000 1,326,000     104,000  1,000     15,181,000 13,000        -960                      
      basic earnings per common share:
                                                                                  
      asset impairment charge
                  1,090,750   4,363,000 14,436,000 2,130,000 54,284,000    563,234,000   224,327,000           6,250,000                                        
      income tax provision
                         -18,115,000 6,222,000 8,743,000 -113,413,000 14,138,000 39,596,000 -32,031,000 25,078 1,352,000 527,755,000 10,535,000 11,509,000 17,000 -12,634,250 -10,478,000 -21,771,000 85,000 2,842,000 12,178,000 18,720,000 36,956,000 77,769,000 128,800,000 102,788,000 100,838,000 89,763,000 139,387,000 81,085,000 86,722,000 80,939,000 75,155,000 84,138,000 62,995,000 60,379,000 62,390,000 43,785,000 28,487,000 34,911,000 36,651,000 83,390,000 81,248,000 70,187,000 58,784,000 60,146,000 64,960,000 59,338,000 64,098,000 47,636,000 38,240,000 32,802,000 20,627,000 15,153,000 27,130,000     
      operating loss from continuing operations
                    -22,617,000 -42,611,000 -82,878,250 -77,367,000 -160,923,000  -136,189,250 -57,584,000                                                       
      loss from continuing operations before income taxes
                    -1,952,000 -58,899,000 -104,857,000 -80,364,000 -159,920,000  -138,149,750 -63,585,000         -5,555,000                                              
      loss from continuing operations
                    -4,624,000 -51,331,000 -79,534,000 -56,705,000 -123,296,000  -108,936,500 -46,007,000                                                       
      income tax benefit
                     -7,568,000 -25,323,000 -23,659,000 -36,624,000  -23,253,000 -17,578,000         -3,922,000 -500,641,000                                             
      loss on sale of assets
                      686,250 -3,434,000 18,515,000                                                          
      gain on sale of subsidiary
                             14,963,000                                                     
      gain on sale of assets
                         -12,336,000 -27,985,000 -4,201,000 -10,310,000 -4,279,000 -12,641,000 -9,960,000 -11,546 -5,545,000                                                 
      basic income per common share:
                                                                                  
      diluted income per common share:
                                                                                  
      contract drilling services
                          389,023,250 314,405,000 630,290,000 611,398,000                                                     
      contract drilling services operating expenses, excluding depreciation and amortization
                          255,567,500 205,198,000 417,743,000 389,206,000                                                     
      basic loss per common share:
                                                                                  
      loss from discontinued operations
                            -72,000    -10,966    -10,246,000 -536,000   -345,000                                          
      diluted loss per common share:
                                                                                  
      contract drilling
                              534,949,500 684,788,000 717,653 737,358,000                                                 
      contract drilling operating expenses, excluding depreciation and amortization
                              343,106,500 443,114,000 441,719 487,593,000                                                 
      operating expenses applicable to other revenues
                              1,074,000 1,414,000 1,620 1,274,000                                                 
      weighted-average shares outstanding
                                                                                  
      basic
    99,878 99,544 99,272 99,422 99,360 98,867,000 98,857,000 98,752,000 98,774,000 99,143,000 102,447,000 101,163,000 103,968,000 105,248,000 105,891,000 105,289,000 105,393,000 107,571,000 107,818,000 107,896,000 107,861,000 107,617,000 108,009,000 107,439,000 108,557,000 108,555,000 109,216,000 109,425,000 109,406 109,142,000 108,851,000 108,905,000 108,868,000 108,683,000 108,500,000 108,572,000 108,565,000 108,276,000 108,047,000 108,014,000 107,852,000 107,652,000 107,646,000 107,973,000 108,137,000 107,692,000 107,149,000 106,430,000 106,326,000 105,867,000 107,016,000 107,385,000 107,186,000 106,962,000 106,515,000 106,031,000 105,743,000 105,711,000 105,575,000  105,317,000 105,249,000 104,530,000 103,883,000 103,509,000 103,323,000 103,239,000 103,312,000 105,019,000 52,314,000 51,993,000 51,233,000 50,955,000 50,543,000     
      diluted
    99,878 99,544 99,272 99,422 99,381 99,159,000 99,067,000 99,007,000 99,046,000 99,628,000 102,852,000 101,550,000 104,363,000 106,104,000 106,555,000 106,021,000 105,393,000 107,571,000 107,818,000 107,896,000 107,861,000 107,617,000 108,009,000 107,439,000 108,557,000 108,724,000 109,216,000 109,425,000 109,503 109,425,000 109,387,000 108,905,000 108,868,000 109,095,000 108,500,000 108,572,000 108,565,000 108,276,000 108,047,000 108,466,000 108,409,000 108,469,000 108,370,000 108,843,000 109,285,000 109,081,000 108,577,000 107,826,000 107,786,000 107,412,000 108,425,000 109,042,000 108,788,000 108,784,000 108,595,000 107,852,000 107,444,000 107,484,000 107,238,000  106,372,000 106,431,000 106,689,000 106,090,000 105,615,000 105,313,000 104,832,000 104,776,000 106,419,000 53,057,000 53,087,000 52,236,000 51,891,000 51,256,000     
      drilling - u.s. land
                                  370,237,750 536,582,000 482,729,000 461,640,000 439,404,000 405,516,000 330,967,000                                          
      drilling - offshore
                                  26,004,500 37,669,000 32,983,000 33,366,000 32,505,000 33,711,000 36,235,000                                          
      drilling - international land
                                  44,742,500 63,297,000 52,459,000 63,214,000 55,109,000 55,075,000 34,757,000                                          
      operating costs, excluding depreciation and amortization
                                  300,787,500 444,511,000 385,556,000 373,083,000                                             
      general and administrative
                                  36,818,000 52,399,000 48,325,000 46,548,000 40,331,000 42,890,000 33,519,000 34,262,000 46,496,000 33,811,000 32,074,000 29,404,000 34,902,000 32,907,000 34,222,000 34,431,000 32,243,000 31,090,000 32,836,000 32,421,000 25,576,000 27,805,000 26,163,000 24,071,000 24,406,000 19,889,000 20,114,000 20,844,000 20,844,000 14,225,000 16,434,000 15,148,000 14,723,000 14,090,000 13,903,000 11,538,000 13,350,000 10,613,000 13,049,000 13,957,000 11,938,000 11,680,000 9,593,000 9,246,000 9,516,000 9,789,000 9,102,000  
      gain on sale of property, plant and equipment
                                  -3,783,250 -4,313,000                                               
      dividends declared per common share
                                  527.5 710 700 700 525 700 700 700 700 687.5 687.5 687.5 687.5 687.5 690 625 625 500 150 150 70 70 70 70 60 60 60 50 50 50 50 50 50 45 45 45 45 45 45 82.5 82.5 82.5 82.5 82.5     
      income from asset sales
                                    -5,255,000 -5,565,000 -3,034,000 -1,862,000 -14,889,000                                  973,000 603,000 971,000 10,816,000     
      loss from discontinued operations before income taxes
                                     -519,000                                             
      operating costs, excluding depreciation
                                      220,492,750 337,463,000 296,829,000 247,679,000 186,146,000 221,611,000 276,644,000 351,670,000 469,328,000 554,243,000 515,239,000 480,167,000 474,048,000 450,990,000 461,737,000 466,871,000 463,935,000 448,208,000 391,032,000 365,586,000 340,039,000 330,046,000 285,583,000 271,509,000 212,693,000 220,339,000 263,294,000 330,928,000 274,168,000 253,958,000 235,795,000 229,025,000 199,456,000 199,467,000 169,429,000 156,800,000         
      depreciation
                                      107,916,750 145,043,000 152,777,000 133,847,000 138,690,000 141,517,000 142,129,000 144,295,000 149,708,000 137,613,000 128,978,000 123,963,000 120,237,000 117,790,000 112,433,000 106,599,000 95,182,000 90,934,000 86,288,000 79,109,000 76,161,000 73,180,000 65,208,000 65,795,000 62,803,000 61,043,000 57,113,000 54,772,000 51,210,000 51,872,000 43,984,000 38,125,000 32,952,000 30,151,000 25,076,000 23,385,000 22,923,000 23,419,000 23,950,000 23,262,000 23,934,000 23,402,000 22,268,000  
      operating revenues:
                                                                                  
      drilling — u.s. land
                                         263,636,000 285,028,000 349,283,000 369,805,000 494,615,000 718,463,000 890,047,000 802,279,000 741,791,000 731,674,000 695,816,000 685,710,000 696,030,000 706,786,000 658,804,000 617,779,000 539,372,000 495,459,000 476,818,000 366,989,000 324,439,000       347,644,000   269,900,000 214,864,000  172,754,000 138,720,000 122,394,000      
      drilling — offshore
                                         33,812,000 30,492,000 34,325,000 41,880,000 55,673,000 62,626,000 69,473,000 64,554,000 63,276,000 59,054,000 53,859,000 55,605,000 57,718,000 41,617,000 43,421,000 50,792,000 54,569,000 50,586,000 44,867,000 53,131,000 47,765,000       27,281,000              
      drilling — international land
                                         68,031,000 47,983,000 51,352,000 72,194,000 106,198,000 98,222,000 92,885,000 81,267,000 85,533,000 95,341,000 86,978,000 94,092,000 87,267,000 67,482,000 64,088,000 60,735,000 46,051,000 54,684,000 68,954,000 60,045,000 64,681,000       78,602,000              
      operating revenues: - sum
                                         368,590,000 366,486,000 438,191,000 487,847,000               594,642,000    387,767,000              174,679,000     
      operating costs and other:
                                                                                  
      operating income (loss) from continuing operations
                                                                                  
      gain from sale of investment securities
                                                23,882,000 21,352,000  153,369,000                               
      other income:
                                                                                  
      gain on sale of investment securities
                                                     8,752,000    913,000         16,388,000 5,476,000 130,000 25,298,000 177,000 26,337,000 9,390,000  2,720,000  -36,000 26,349,000     
      gain from involuntary conversion of long-lived assets
                                                                                  
      income from continuing operations before income taxes and equity in income of affiliate
                                                            108,668,000                      
      equity in income of affiliate net of income taxes
                                                                4,222,000 5,889,000 4,912,000 3,065,000  2,372,000 2,551,000 1,504,000 1,647,000 2,025,000 555,000 458,000 687,000 706,000     
      income before income taxes and equity in income of affiliate
                                                             75,234,000 98,146,000 89,695,000 182,906,000 220,634,000 190,644,000 157,773,000 164,431,000 177,792,000 163,648,000 173,380,000 125,964,000 100,788,000 83,061,000 49,994,000 36,816,000 65,734,000     
      earnings per common share:
                                                                                  
      basic
                                                             440 600 500 990 1,380 1,200 980 1,040 1,110 1,040 1,070 760 1,230 980 580 440 780 90 120 110  
      diluted
                                                             430 590 500 980 1,360 1,180 960 1,020 1,090 1,020 1,060 750 1,220 960 570 430 770 90 120 110  
      drilling – u.s. land
                                                              285,069,000 282,358,000 414,514,000 475,204,000 391,755,000 365,263,000  303,514,000 269,145,000   193,668,000    109,188,000     
      drilling – offshore
                                                              52,290,000 55,605,000 51,331,000 50,488,000 47,298,000 29,789,000               
      drilling – international land
                                                              59,398,000 47,290,000 51,829,000 95,178,000 80,585,000 75,757,000               
      acquired in-process research and development
                                                                  11,129,000                
      weighted average shares outstanding:
                                                                                  
      basic
                                                               105,425,000                   
      diluted
                                                               106,829,000                   
      real estate
                                                                   2,835,000 3,136,000 2,777,000 2,738,000 2,899,000 2,533,000 2,342,000 2,857,000 2,732,000 2,608,000 2,664,000     
      equity in income of affiliate, net of income taxes
                                                                    3,545,000              
      drilling – u.s. offshore
                                                                     24,910,000 24,062,000   33,703,000    20,356,000     
      drilling – international
                                                                     90,073,000 76,591,000   61,117,000    42,471,000     
      drilling — u.s. offshore
                                                                       30,986,000 34,568,000  29,520,000 19,905,000 18,649,000      
      drilling — international
                                                                       82,614,000 67,831,000  50,257,000 46,030,000 41,799,000      
      operating costs and expenses:
                                                                                  
      operating costs
                                                                          140,596,000 121,470,000 114,321,000 111,252,000     
      operating costs and expenses: - sum
                                                                             143,760,000     
      other income: - sum
                                                                             34,815,000     
      revenues
                                                                                  
      income from investments
                                                                              376,000 7,723,000 4,024,000  
      cost and expenses
                                                                                  
      direct operating costs
                                                                              105,302,000 104,660,000 93,527,000  
      interest
                                                                              3,114,000 3,112,000 3,222,000  
      income before income taxes and equity in income of affiliates
                                                                              6,008,000 10,223,000 10,775,000  
      benefit from income taxes
                                                                              2,522,000    
      equity in income of affiliates net of income taxes
                                                                              861,000 309,000 -620,000  
      cash dividends
                                                                              82.5 80 80  
      average common shares outstanding:
                                                                                  
      basic
                                                                              50,404,000 50,263,000 50,154,000  
      diluted
                                                                              50,880,000 50,903,000 50,667,000  
      provision for income taxes
                                                                               4,484,000 4,526,000  
    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 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-06-30 2013-03-31 2012-12-31 2012-06-30 2012-03-31 2011-12-31 2011-06-30 2011-03-31 2010-12-31 2010-06-30 2010-03-31 2009-12-31 2009-06-30 2009-03-31 2008-12-31 2008-06-30 2008-03-31 2007-12-31 2007-06-30 2007-03-31 2006-12-31 2006-06-30 2006-03-31 2005-12-31 2005-06-30 2005-03-31 2004-12-31 2004-06-30 2004-03-31 2003-12-31 2003-09-30 
                                                                                      
        assets
                                                                                      
        current assets:
                                                                                      
        cash and cash equivalents
      177,196,000 247,195,000 196,848,000 166,074,000 174,763,000 391,179,000 217,341,000 203,633,000 193,636,000 214,104,000 257,174,000 220,609,000 159,672,000 229,186,000 232,131,000 188,663,000 202,206,000 234,196,000 917,534,000 370,553,000 427,243,000 373,980,000 487,884,000 426,245,000 336,089,000 355,010,000 347,943,000 334,775,000 243,912,000 228,462,000 284,355,000 306,426,000 334,764,000 383,664,000  572,787,000 741,746,000 825,893,000 898,013,000 907,032,000 898,013,000 848,230,000 848,230,000 719,127,000 251,636,000 360,909,000 549,928,000 584,979,000 581,414,000 480,480,000 172,993,000 241,146,000 148,866,000 324,385,000 347,859,000 288,065,000 240,685,000 173,824,000 77,717,000 125,712,000 153,053,000 141,705,000 126,378,000 138,024,000 99,018,000 90,736,000 97,507,000 70,562,000 89,140,000 73,088,000 114,101,000 195,155,000 301,578,000 236,285,000 208,453,000 177,524,000 24,447,000 30,558,000 35,497,000 38,189,000 
        restricted cash
      25,521,000 30,884,000 27,412,000 59,412,000 68,672,000 73,216,000 68,902,000 78,369,000 68,547,000 65,137,000 59,064,000 61,364,000 53,231,000 42,472,000 36,246,000                                                                  
        short-term investments
      21,951,000 21,775,000 21,496,000 21,325,000 20,819,000 135,317,000 292,919,000 86,088,000 83,390,000 84,121,000 93,600,000 72,609,000 85,090,000 118,457,000 117,101,000 144,331,000 148,377,000 207,068,000 198,700,000 187,256,000 134,491,000 149,822,000 89,335,000 65,787,000 45,655,000 57,044,000 52,960,000 45,748,000 26,118,000 41,072,000 41,461,000 44,279,000 45,270,000 42,541,000  39,894,000 48,012,000 45,263,000 45,526,000 49,565,000 45,526,000 47,708,000 47,708,000                  12,516,000 12,500,000 12,500,000                  
        accounts receivable
      810,613,000 726,819,000 782,644,000 782,625,000 786,343,000 426,933,000 418,604,000 415,395,000 431,681,000 435,819,000 404,188,000 449,588,000 525,611,000 512,681,000 458,713,000 397,880,000 329,572,000 282,381,000 228,894,000 233,632,000 209,402,000 233,623,000 192,623,000 302,194,000 531,556,000 500,947,000 495,602,000 508,183,000 552,737,000 545,731,000 565,202,000 565,321,000                                               89,598,000  
        inventories of materials and supplies
      330,542,000 324,814,000 324,326,000 329,985,000 321,620,000 127,288,000 117,884,000 115,312,000 107,210,000 101,419,000 94,227,000 101,299,000 99,408,000 90,761,000 87,957,000 86,091,000 83,588,000 87,272,000 84,057,000 90,537,000 96,504,000 99,353,000 104,180,000 113,034,000 112,474,000 148,688,000 149,653,000 150,126,000 161,526,000 159,992,000 158,134,000                                                  
        prepaid expenses and other
      82,357,000 85,030,000 97,518,000 116,853,000 120,971,000 70,898,000 76,419,000 71,522,000 64,316,000 88,080,000 97,727,000 86,371,000 80,090,000 83,506,000 66,463,000 103,589,000 97,380,000 80,956,000 85,928,000 91,477,000 97,857,000 95,946,000 89,305,000 83,284,000 94,342,000 92,955,000 68,928,000 77,406,000 63,711,000 67,490,000 66,398,000 65,343,000 62,424,000 65,802,000 12,200,638,336,979,000 58,425,000 70,067,000 75,926,000 56,233,000 79,021,000 56,233,000 71,151,000 71,151,000 79,132,000 90,118,000 80,912,000 69,324,000 59,091,000 61,222,000 68,277,000 50,450,000 48,557,000 90,681,000 72,910,000 77,707,000 74,253,000 61,406,000 62,051,000 66,041,000 71,455,000 77,488,000 64,107,000 49,331,000 60,151,000 59,804,000 40,963,000 36,224,000 29,453,000 32,726,000 30,829,000 17,196,000 26,630,000 30,406,000 22,685,000 25,785,000 26,403,000 14,778,000 14,449,000 58,170,000 45,721,000 
        assets held-for-sale
      24,506,000 25,820,000 15,231,000 14,238,000       645,000 988,000 1,349,000 1,551,000 4,333,000 25,604,000 57,373,000 62,821,000 71,453,000 10,088,000 13,076,000                                                            
        total current assets
      1,472,686,000 1,462,337,000 1,465,475,000 1,490,512,000 1,493,188,000 1,224,831,000 1,192,069,000 970,319,000 948,780,000 988,680,000 1,006,625,000 992,828,000 1,004,451,000 1,078,614,000 1,002,944,000 946,158,000 918,496,000 954,694,000 1,586,566,000 983,543,000 978,573,000 952,724,000 963,327,000 990,544,000 1,120,116,000 1,154,644,000 1,115,086,000 1,116,238,000 1,048,004,000 1,042,747,000 1,115,550,000 1,133,478,000 1,130,983,000 1,166,346,000 123,791,073,034,150,300,000 1,250,388,000 1,363,887,000 1,445,283,000 1,460,377,000 1,537,672,000 1,460,377,000 1,476,676,000 1,476,676,000 1,568,369,000 1,209,992,000 1,277,001,000 1,450,421,000 1,388,984,000 1,391,290,000 1,280,490,000 931,976,000 979,432,000 942,577,000 999,360,000 1,003,428,000 882,609,000 803,587,000 710,424,000 549,250,000 550,370,000 580,496,000 592,074,000 704,868,000 716,341,000 611,399,000 543,985,000 541,282,000 463,627,000 464,022,000 472,325,000 509,353,000 528,157,000 547,251,000 435,283,000 392,932,000 352,239,000 197,325,000 212,861,000   
        investments
      85,611,000 70,538,000 68,198,000 102,448,000 132,048,000 101,652,000 100,567,000 292,229,000 274,446,000 263,443,000 264,947,000 246,059,000 261,960,000 220,892,000 218,981,000 213,956,000 219,295,000 193,624,000 135,444,000 36,886,000 34,569,000 34,018,000 31,585,000 25,280,000 20,300,000 35,149,000 31,991,000 48,291,000 60,247,000 54,731,000 98,696,000 92,702,000 73,356,000 83,943,000 1,385,370,173,000 76,986,000 88,299,000 105,177,000 83,363,000 99,898,000 83,363,000 85,276,000 85,276,000 164,648,000 165,581,000 236,644,000 279,428,000 284,670,000 312,455,000 287,634,000 501,383,000 441,794,000 382,527,000 444,365,000 399,995,000 453,046,000 480,939,000 397,793,000 274,620,000 355,654,000 366,672,000 267,554,000 176,156,000 173,549,000 218,869,000 205,660,000 222,971,000 206,437,000 206,013,000 191,119,000 229,599,000 234,046,000 192,166,000 165,500,000 157,076,000 149,667,000 172,785,000 173,195,000 168,157,000 158,770,000 
        property, plant and equipment
      3,977,180,000 4,100,077,000 4,313,074,000 4,408,156,000 4,485,344,000 3,009,360,000 3,016,277,000 3,014,345,000 2,993,825,000 2,970,371,000 2,921,695,000 2,932,593,000 2,931,301,000 2,942,059,000 2,960,809,000 2,987,107,000 3,022,335,000 3,066,326,000 3,127,287,000 3,281,082,000 3,374,235,000 3,552,107,000 3,646,341,000 3,754,206,000 3,840,213,000 4,412,359,000 4,502,084,000 4,583,673,000 4,886,948,000 4,900,339,000 4,857,382,000 4,883,378,000   498,514,609,144,342,050,000   5,102,679,000 5,446,352,000 5,306,434,000 5,446,352,000 5,530,817,000 5,530,817,000 5,572,818,000 5,400,016,000 5,188,544,000 4,943,660,000 4,801,236,000 4,693,770,000 4,613,301,000 4,560,562,000 4,491,051,000 4,170,303,000 3,975,239,000 3,832,001,000 3,553,743,000 3,420,635,000 3,336,624,000 3,235,863,000 3,285,139,000 3,273,643,000 3,209,344,000 3,086,714,000 2,885,454,000 2,534,931,000 2,395,862,000 2,283,982,000 2,009,182,000 1,807,965,000 1,603,978,000 1,242,769,000 1,118,529,000 1,018,971,000 967,153,000 959,487,000 970,443,000 1,057,597,000 1,063,923,000 1,065,268,000  
        other noncurrent assets:
                                                                                      
        goodwill
      183,795,000 182,576,000 182,854,000 166,559,000 343,817,000 45,653,000 45,653,000 45,653,000 45,653,000 45,653,000 45,653,000 45,653,000 45,653,000 45,653,000 45,653,000 45,653,000 45,653,000 45,653,000 45,653,000 45,653,000 45,653,000 45,653,000 45,653,000 45,653,000 45,653,000 82,786,000 82,786,000 67,902,000 67,902,000 67,902,000 64,777,000 69,496,000 69,496,000 69,347,000  51,967,000                                             
        intangible assets
      444,059,000 463,082,000 485,540,000 493,795,000 511,295,000 52,547,000 54,147,000 55,752,000 57,360,000 58,968,000 60,575,000 62,183,000 63,790,000 65,398,000 67,154,000 68,950,000 70,246,000 72,042,000 73,838,000 75,634,000 77,430,000 79,226,000 81,027,000 82,740,000 84,533,000 86,329,000 86,716,000 69,093,000 70,531,000 71,969,000 73,207,000 75,564,000                                                 
        operating lease right-of-use assets
      111,801,000 117,294,000 123,598,000 120,213,000 113,667,000 67,510,000 67,076,000 57,315,000 59,730,000 62,254,000 50,400,000 36,972,000 37,150,000 38,539,000 39,064,000 40,539,000 45,325,000 47,356,000                                                               
        other assets
      61,135,000 61,763,000 65,359,000 78,680,000 161,285,000 72,944,000 63,692,000 49,369,000 45,054,000 31,959,000 32,061,000 24,528,000 21,428,000 20,693,000 20,926,000 20,247,000 13,000,000 12,559,000 16,153,000 19,371,000 21,170,000 20,105,000 17,105,000 16,369,000 17,209,000 18,053,000 20,852,000 12,182,000 10,930,000 6,653,000 5,255,000 11,254,000 12,431,000 13,424,000 495,538,398,360,000 20,067,000 24,630,000 24,498,000 35,013,000 32,515,000 35,013,000 37,505,000 37,505,000 38,315,000 25,930,000 18,809,000 19,573,000 13,391,000 13,072,000 16,186,000 18,531,000 22,011,000 22,894,000 22,108,000 22,463,000 21,638,000 20,551,000 20,778,000 13,921,000 14,476,000 14,803,000 10,882,000 12,078,000 12,667,000 13,322,000 10,611,000 10,554,000 8,076,000 6,537,000 4,584,000 3,173,000 3,288,000 3,387,000 2,652,000 662,000 743,000 21,177,000 1,021,000 1,315,000 1,329,000 
        total other noncurrent assets
      800,790,000 826,144,000 858,991,000 860,887,000 1,131,683,000 1,480,778,000 1,472,985,000 208,089,000 207,797,000 198,834,000 188,689,000 169,336,000 168,021,000 170,283,000 172,797,000 175,389,000 174,224,000 177,610,000 184,831,000 193,774,000 200,727,000 187,904,000 188,368,000 192,296,000 196,125,000 239,358,000 190,354,000 149,177,000 149,363,000 146,524,000                                                   
        total assets
      6,336,267,000 6,459,096,000 6,705,738,000 6,862,003,000 7,242,263,000 5,816,621,000 5,781,898,000 4,484,982,000 4,424,848,000 4,421,328,000 4,381,956,000 4,340,816,000 4,365,733,000 4,411,848,000 4,355,531,000 4,322,610,000 4,334,350,000 4,392,254,000 5,034,128,000 4,495,285,000 4,588,104,000 4,726,753,000 4,829,621,000 4,962,326,000 5,176,754,000 5,841,510,000 5,839,515,000 5,897,379,000 6,144,562,000 6,144,341,000 6,214,867,000 6,265,872,000 6,261,792,000 6,362,096,000 56,419,737,686,234,850,000,000 6,513,891,000 6,538,184,000 6,677,637,000 7,025,105,000 6,976,519,000 7,025,105,000 7,130,274,000 7,130,274,000 7,344,150,000 6,801,519,000 6,720,998,000 6,693,082,000 6,488,281,000 6,410,587,000 6,197,611,000 6,012,452,000 5,934,288,000 5,518,301,000 5,441,072,000 5,257,887,000 4,911,036,000 4,725,712,000 4,465,619,000 4,073,654,000 4,205,639,000 4,235,614,000 4,079,854,000 3,979,816,000 3,788,011,000 3,378,521,000 3,156,118,000 3,058,789,000 2,687,322,000 2,484,537,000 2,272,006,000 1,984,894,000 1,884,020,000 1,761,775,000 1,570,588,000 1,510,157,000 1,473,092,000 1,448,884,000 1,451,000,000  1,415,835,000 
        liabilities & shareholders' equity
                                                                                      
        current liabilities:
                                                                                      
        accounts payable
      177,213,000 188,312,000 217,923,000 240,864,000 272,802,000 148,752,000 135,084,000 158,896,000 158,296,000 157,302,000 130,852,000 151,671,000 160,101,000 145,784,000 126,966,000 119,972,000 105,123,000 109,032,000 71,996,000 64,193,000 63,934,000 46,617,000 36,468,000 36,181,000 144,794,000 122,609,000 123,146,000 134,077,000 130,721,000 141,406,000 132,664,000 143,732,000 123,012,000 126,936,000 82,360,486,794,589,000 137,206,000 127,116,000 111,638,000 91,437,000 92,692,000 91,437,000 96,442,000 96,442,000 172,373,000 168,346,000 182,031,000 139,396,000 135,300,000 130,490,000 134,153,000 94,653,000 107,553,000 88,855,000 98,007,000 122,232,000 74,312,000 71,108,000 58,009,000 54,137,000 55,994,000 58,981,000 110,640,000 160,654,000 184,872,000 156,559,000 110,865,000 108,080,000 126,429,000 116,612,000 116,472,000 62,672,000 65,002,000 45,310,000 29,249,000 24,500,000 21,689,000 24,941,000 22,830,000 30,361,000 29,630,000 
        dividends payable
      25,421,000 25,417,000 25,199,000 25,204,000 25,210,000 25,154,000 25,024,000 42,045,000 42,047,000 41,993,000 25,194,000 48,878,000 50,409,000 51,540,000 26,693,000 26,693,000 26,697,000 26,819,000 27,332,000 27,324,000 27,327,000 27,378,000 27,226,000 27,244,000                                                         
        accrued liabilities
      514,422,000 501,264,000 564,855,000 536,842,000 582,798,000 261,807,000 286,841,000 255,851,000 238,494,000 269,691,000 262,885,000 232,947,000 203,211,000 272,247,000 241,151,000 254,611,000 245,778,000 263,125,000 283,492,000 173,784,000 160,342,000 154,266,000 155,442,000 178,742,000 232,625,000 296,738,000 287,092,000 256,449,000 242,986,000 244,507,000 244,504,000 237,935,000 217,095,000 228,732,000 2,669,814,849,133,941,000 196,643,000 174,261,000 174,920,000 240,665,000 194,645,000 240,665,000 269,946,000 269,946,000 176,256,000 234,932,000 282,278,000 244,539,000 184,847,000 229,998,000 254,732,000 166,237,000 274,475,000 204,578,000 167,519,000 186,446,000 182,427,000 138,758,000 147,893,000 149,153,000 126,939,000 156,366,000 118,152,000 137,916,000 150,201,000 113,290,000 100,131,000 123,119,000 102,581,000 106,120,000 140,735,000 71,364,000 50,611,000 70,917,000 35,956,000 31,221,000 36,653,000 26,843,000 28,203,000 28,110,000 28,988,000 
        current portion of long-term debt
      146,257,000 6,859,000 6,859,000 6,859,000 6,755,000              483,486,000                                                              
        total current liabilities
      863,313,000 721,852,000 814,836,000 809,769,000 887,565,000 435,713,000 446,949,000 456,792,000 438,837,000 468,986,000 418,931,000 433,496,000 413,721,000 469,571,000 394,810,000 401,276,000 377,598,000 398,976,000 866,306,000 265,301,000 251,603,000 228,261,000 219,136,000 242,167,000 377,419,000 419,347,000 410,238,000 390,526,000 373,707,000 385,913,000 377,168,000 381,668,000 340,185,000 355,762,000 10,905,819,717,038,604,000 333,929,000 301,417,000 286,628,000 371,328,000 326,609,000 371,328,000 408,790,000 408,790,000 391,145,000 447,456,000 507,161,000 502,111,000 438,488,000 478,737,000 432,854,000 304,537,000 427,233,000 413,589,000 385,724,000 428,849,000 261,909,000 215,748,000 211,820,000 210,978,000 182,933,000 320,347,000 358,792,000 428,570,000 360,073,000 272,108,000 210,996,000 231,199,000 254,010,000 247,732,000 295,928,000 136,362,000 115,613,000 116,227,000 65,584,000 55,721,000 58,342,000 54,784,000 76,033,000   
        noncurrent liabilities:
                                                                                      
        long-term debt
      1,856,176,000 2,026,314,000 2,057,084,000 2,184,836,000 2,233,619,000 1,781,674,000 1,782,182,000 545,589,000 545,441,000 545,292,000 545,144,000 544,996,000 542,734,000 542,932,000 542,610,000 542,290,000 541,969,000 542,236,000 541,997,000 481,002,000 481,647,000 481,187,000 480,727,000 480,269,000 479,811,000 479,355,000 479,356,000 491,651,000 491,227,000 490,805,000 493,968,000              40,000,000  80,000,000 80,000,000 80,000,000 195,000,000 195,000,000 195,000,000 235,000,000 235,000,000 235,000,000 350,000,000 350,000,000 350,000,000 390,000,000 440,000,000 380,000,000 430,000,000                   
        deferred income taxes
      617,911,000 631,121,000 624,000,000 614,633,000 646,213,000 485,682,000 495,481,000 494,412,000 502,088,000 510,015,000 517,809,000 541,424,000 540,316,000 537,264,000 537,712,000 527,545,000 552,263,000 545,869,000 563,437,000 584,633,000 604,536,000 635,443,000 650,675,000 685,589,000 700,360,000 798,802,000 806,611,000 827,027,000 861,440,000 853,187,000 853,136,000 833,738,000 816,669,000 830,494,000  1,325,250,000 1,308,794,000 1,332,269,000      14,649,000 15,739,000 16,519,000 12,170,000 13,998,000 17,323,000 18,282,000 18,497,000 23,218,000 20,686,000 21,890,000 15,789,000 19,535,000 14,198,000 10,146,000 17,480,000 18,652,000 20,560,000 8,250,000 13,985,000 492,885,000 435,912,000 404,534,000 385,675,000 322,481,000 294,755,000 271,453,000 279,035,000 273,720,000 253,388,000 233,319,000 221,148,000 212,945,000 218,765,000 206,431,000 195,451,000 181,737,000 
        retirement benefit obligations
      99,790,000 104,795,000  119,603,000 108,117,000                                                                            
        other
      269,220,000 272,738,000 270,616,000 266,435,000 314,486,000 166,771,000 140,134,000 131,344,000 135,408,000 137,389,000 128,129,000 112,819,000 113,156,000 116,136,000 113,387,000 116,770,000 125,754,000 126,551,000 147,757,000 154,049,000 163,063,000 151,070,000 147,180,000 143,162,000 142,664,000 153,026,000 115,746,000 78,490,000 84,989,000 84,565,000 93,606,000 99,727,000 93,661,000 87,852,000 254,574,347,132,481,000 108,946,000 83,552,000 86,359,000 95,984,000 93,221,000 95,984,000 97,783,000 97,783,000 93,180,000 71,356,000 64,110,000 57,465,000 57,458,000 60,078,000 80,608,000 85,560,000 92,861,000 99,394,000 102,603,000 97,494,000 91,661,000 102,270,000 99,665,000 73,227,000 77,240,000 78,028,000 49,145,000 54,399,000 58,608,000 49,329,000 46,508,000 42,896,000 46,308,000 42,919,000 41,307,000 47,921,000 51,025,000 49,688,000 45,405,000 43,588,000 41,636,000 38,626,000 31,544,000 30,106,000 87,570,000 
        total noncurrent liabilities
      2,843,097,000 3,034,968,000 3,061,564,000 3,185,507,000 3,302,435,000 2,434,127,000 2,417,797,000 1,171,345,000 1,182,937,000 1,192,696,000 1,191,082,000 1,199,239,000 1,196,206,000 1,197,132,000 1,195,249,000 1,188,666,000 1,222,342,000 1,216,687,000 1,255,204,000 1,222,077,000 1,252,805,000 1,273,574,000 1,291,971,000 1,324,102,000 1,338,329,000 1,446,626,000 1,417,054,000 1,411,799,000 1,452,235,000 1,432,190,000 1,454,964,000 1,441,713,000 1,418,454,000 1,415,984,000 13,683,242,033,577,615,000,000 1,930,058,000 1,889,373,000 1,915,094,000 1,871,677,000 1,948,448,000 1,871,677,000 1,891,191,000 1,891,191,000 1,950,629,000 1,432,841,000 1,322,860,000 1,371,884,000 1,361,720,000 1,363,238,000 1,469,733,000 1,533,283,000 1,516,660,000 1,470,122,000 1,453,252,000 1,383,230,000 1,428,889,000 1,382,970,000 1,290,457,000 1,157,149,000 1,227,911,000 1,159,285,000 1,127,120,000 1,065,189,000 1,041,493,000 940,241,000 931,042,000 913,571,000 748,789,000 667,674,000 517,760,000 526,956,000 524,745,000 503,076,000 478,724,000 464,736,000 454,581,000 457,391,000 437,975,000   
        commitments and contingencies
                                                                                      
        shareholders' equity:
                                                                                      
        common stock
      11,222,000 11,222,000 11,222,000 11,222,000 11,222,000 11,222,000 11,222,000 11,222,000 11,222,000 11,222,000 11,222,000 11,222,000 11,222,000 11,222,000 11,222,000 11,222,000 11,222,000 11,222,000 11,222,000 11,222,000 11,222,000 11,222,000 11,215,000 11,215,000 11,215,000 11,215,000 11,208,000 11,208,000 11,208,000 11,208,000 11,201,000 11,201,000 11,201,000 11,201,000 11,196,100,000 11,190,000 11,188,000 11,188,000 11,136,000 11,138,000 11,136,000 11,130,000 11,130,000 11,085,000 11,083,000 11,051,000 11,048,000 11,032,000 10,962,000 10,848,000 10,843,000 10,826,000 10,759,000 10,756,000 10,749,000 10,714,000 10,706,000 10,706,000 10,706,000 10,706,000 10,706,000 10,706,000 10,706,000 10,706,000 10,706,000 10,706,000 10,706,000 10,706,000 10,706,000 10,706,000 10,706,000 5,353,000  5,353,000 5,353,000 5,353,000   5,353,000 5,353,000 
        preferred stock, no par value, 1,000,000 shares authorized, no shares issued
                                                                                      
        additional paid-in capital
      506,523,000 499,943,000 513,050,000 505,657,000 497,981,000 501,516,000 518,083,000 510,379,000 502,586,000 506,672,000 525,369,000 517,259,000 509,205,000 512,928,000 528,278,000 521,439,000 514,771,000 514,969,000 529,903,000 523,281,000 516,870,000 511,956,000 521,628,000 514,673,000 509,928,000 499,277,000 510,305,000 501,585,000 493,421,000 484,122,000 500,393,000 494,604,000 487,135,000 479,914,000 487,248,524,371,039,000 478,231,000 470,918,000 463,859,000 436,117,000 442,883,000 436,117,000 427,590,000 427,590,000 402,442,000 395,325,000 383,972,000 376,465,000 359,995,000 322,889,000 273,287,000 265,943,000 254,689,000 231,044,000 225,917,000 218,724,000 205,009,000 200,095,000 193,341,000 188,786,000 185,349,000 182,121,000 174,008,000 172,213,000 170,197,000 167,456,000 152,040,000 146,819,000 141,279,000 138,934,000 137,225,000 133,888,000 130,876,000 118,202,000 100,033,000 97,016,000 92,240,000 85,339,000 85,038,000 83,609,000 83,302,000 
        retained earnings
      2,412,788,000 2,496,928,000 2,619,090,000 2,701,649,000 2,889,608,000 2,913,211,000 2,883,590,000 2,833,136,000 2,786,495,000 2,743,794,000 2,707,715,000 2,655,287,000 2,608,100,000 2,494,106,000 2,473,572,000 2,454,726,000 2,463,665,000 2,495,206,000 2,573,375,000 2,679,859,000 2,762,735,000 2,911,006,000 3,010,012,000 3,096,168,000 3,168,966,000 3,666,260,000 3,714,307,000 3,750,785,000 3,979,708,000 3,997,283,000 4,027,779,000 4,103,418,000 4,189,497,000 4,278,326,000 38,556,865,396,212,200,000,000 3,954,705,000 4,052,974,000 4,178,235,000 4,536,047,000 4,438,748,000 4,536,047,000 4,589,597,000 4,589,597,000 4,729,390,000 4,654,349,000 4,525,797,000 4,431,974,000 4,314,571,000 4,208,074,000 3,996,530,000 3,783,890,000 3,648,872,000 3,355,603,000 3,213,113,000 3,090,946,000 2,840,315,000 2,738,008,000 2,645,662,000 2,471,238,000 2,514,320,000 2,472,875,000 2,368,737,000 2,320,981,000 2,222,515,000 1,961,306,000 1,841,218,000 1,743,874,000 1,534,025,000 1,423,489,000 1,321,286,000 1,121,333,000 1,046,103,000 985,881,000 907,563,000 881,984,000 863,887,000 844,717,000 844,403,000 842,390,000 840,776,000 
        accumulated other comprehensive income
      43,496,000 42,680,000 44,964,000 9,501,000 1,064,000                     -28,119,000 -28,635,000 -16,085,000 -12,072,000 -12,296,000 16,550,000 8,942,000 -5,221,000 2,039,000 23,006,738,000 -4,101,000 2,433,000 12,574,000      40,072,000 41,078,000 83,126,000 112,445,000 113,425,000 129,716,000 105,457,000 205,054,000 167,106,000 121,288,000 158,804,000 131,785,000 168,904,000 184,083,000 132,412,000 62,130,000 112,255,000 119,005,000 72,247,000 15,930,000 16,956,000 62,615,000 58,695,000 70,598,000 59,137,000 59,748,000 53,408,000 74,606,000 78,800,000 55,788,000 43,724,000 39,109,000 37,282,000 43,515,000 44,713,000 40,022,000 33,668,000 
        treasury stock
      -445,250,000 -447,763,000 -463,536,000 -464,069,000 -464,901,000 -473,181,000 -489,393,000 -489,393,000 -489,516,000 -494,195,000 -464,382,000 -464,382,000 -361,161,000 -261,295,000 -235,528,000 -235,652,000 -235,792,000 -224,956,000 -181,638,000 -181,641,000 -181,857,000 -183,535,000 -198,153,000 -198,917,000 -201,500,000 -173,096,000 -194,962,000 -152,439,000 -153,645,000 -154,079,000 -173,188,000 -175,674,000 -179,459,000 -181,130,000 -191,839,000 -190,121,000 -190,119,000                                    -22,752,000 -30,252,000 -33,613,000 -38,436,000     
        non-controlling interest
      101,078,000 99,266,000 104,548,000 102,767,000 117,289,000                                                                            
        total shareholders’ equity
      2,629,857,000 2,702,276,000 2,829,338,000 2,866,727,000 3,052,263,000 2,946,781,000 2,917,152,000 2,856,845,000 2,803,074,000 2,759,646,000 2,771,943,000 2,708,081,000 2,755,806,000 2,745,145,000 2,765,472,000 2,732,668,000 2,734,410,000 2,776,591,000 2,912,618,000 3,007,907,000 3,083,696,000 3,224,918,000 3,318,514,000 3,396,057,000 3,461,006,000 3,975,537,000 4,012,223,000 4,095,054,000 4,318,620,000 4,326,238,000 4,382,735,000 4,442,491,000 4,503,153,000 4,590,350,000 41,645,915,455,487,195,000,000 4,249,904,000 4,347,394,000 4,475,915,000 4,782,100,000 4,701,462,000 4,782,100,000 4,830,293,000 4,830,293,000 5,002,376,000 4,921,222,000 4,890,977,000 4,819,087,000 4,688,073,000 4,568,612,000 4,295,024,000 4,174,632,000 3,990,395,000 3,634,590,000 3,602,096,000 3,445,808,000 3,220,238,000 3,126,994,000 2,963,342,000 2,705,527,000 2,794,795,000 2,755,982,000 2,593,942,000 2,486,057,000 2,386,445,000 2,166,172,000 2,014,080,000 1,914,019,000 1,684,523,000 1,569,131,000 1,458,318,000 1,321,576,000 1,243,662,000 1,142,472,000 1,026,280,000 989,700,000 960,169,000 936,709,000 936,992,000   
        total liabilities and shareholders' equity
      6,336,267,000 6,459,096,000 6,705,738,000 6,862,003,000 7,242,263,000 5,816,621,000 5,781,898,000 4,484,982,000 4,424,848,000 4,421,328,000 4,381,956,000 4,340,816,000 4,365,733,000 4,411,848,000 4,355,531,000 4,322,610,000 4,334,350,000 4,392,254,000 5,034,128,000 4,495,285,000 4,588,104,000 4,726,753,000 4,829,621,000 4,962,326,000 5,176,754,000 5,841,510,000 5,839,515,000 5,897,379,000 6,144,562,000 6,144,341,000                                                   
        retirement benefit obligation
        109,864,000                                                                              
        accumulated other comprehensive loss
           -5,987,000 -6,350,000 -8,499,000 -7,713,000 -7,847,000 -7,981,000 -11,305,000 -11,560,000 -11,816,000 -12,072,000 -19,067,000 -19,456,000 -19,850,000 -20,244,000 -24,814,000 -25,274,000 -25,731,000 -26,188,000 -27,082,000 -27,603,000                                                        
        noncurrent liabilities - discontinued operations
                   800,000 1,540,000 2,061,000 2,356,000 2,031,000 2,013,000 2,393,000 3,559,000 5,874,000 13,389,000 15,082,000 15,494,000 15,443,000 15,341,000 14,631,000 14,579,000 3,633,000 14,254,000 14,548,000                                                 
        operating lease right-of-use asset
                        49,187,000 53,116,000 56,474,000 42,920,000 44,583,000 47,534,000 48,730,000 52,190,000                                                       
        liabilities and shareholders’ equity
                                                                                      
        noncurrent assets:
                                                                                      
        total noncurrent assets
                                    143,239,000 5,132,394,000 5,130,809,000 5,195,750,000  5,263,503,000                                             
        total liabilities and stockholders' equity
                                    6,214,867,000                                                  
        inventories
                                     152,109,000 143,177,000 139,066,000  138,403,000 131,679,000 126,082,000 129,649,000 128,885,000 129,649,000 127,242,000 127,242,000 124,269,000 110,773,000 106,241,000 106,250,000 99,829,000 97,335,000 86,586,000 82,725,000 78,550,000 70,419,000 61,410,000 58,907,000 48,911,000 45,843,000 43,764,000 43,505,000 45,904,000 46,370,000 45,685,000 41,675,000 41,994,000 31,880,000 33,499,000 29,247,000 28,398,000 26,025,000 26,422,000 24,442,000 23,997,000 21,658,000 20,108,000 20,759,000 19,911,000 20,762,000 21,712,000 22,070,000 22,533,000 
        current assets - discontinued operations
                                                                                      
        current liabilities - discontinued operations
                                     1,000                                                 
        long-term debt less unamortized discount and debt issuance costs
                                     493,700,000 493,433,000 493,168,000  492,637,000 492,373,000 492,110,000 492,919,000 493,150,000 492,919,000 492,668,000 492,668,000 532,908,000  39,502,000                                   
        shareholders’ equity:
                                                                                      
        total liabilities and shareholders’ equity
                                     6,265,872,000 6,261,792,000 6,362,096,000 56,419,737,686,234,850,000,000 6,513,891,000 6,538,184,000 6,677,637,000 7,025,105,000 6,976,519,000 7,025,105,000 7,130,274,000 7,130,274,000 7,344,150,000 6,801,519,000 6,720,998,000 6,693,082,000 6,488,281,000 6,410,587,000 6,197,611,000 6,012,452,000 5,934,288,000 5,518,301,000 5,441,072,000 5,257,887,000 4,911,036,000 4,725,712,000 4,465,619,000 4,073,654,000 4,205,639,000 4,235,614,000 4,079,854,000 3,979,816,000 3,788,011,000 3,378,521,000 3,156,118,000 3,058,789,000 2,687,322,000 2,484,537,000 2,272,006,000 1,984,894,000 1,884,020,000 1,761,775,000 1,570,588,000 1,510,157,000 1,473,092,000 1,448,884,000 1,451,000,000 1,440,075,000 1,415,835,000 
        accounts receivables
                                      545,348,000 535,271,000  440,872,000 345,546,000 326,771,000 330,726,000 351,317,000 330,726,000 373,896,000 373,896,000 623,706,000 734,329,000 705,214,000 705,787,000 624,108,000 630,240,000 622,405,000 603,238,000 580,173,000 604,347,000 511,203,000 495,389,000 444,214,000 433,180,000 412,399,000 335,000,000 288,647,000 270,509,000 319,827,000 460,999,000 460,566,000 396,623,000 361,253,000 365,732,000 320,547,000 304,486,000 329,150,000 240,801,000 193,442,000 186,571,000 150,861,000 133,184,000 124,055,000 102,258,000 101,982,000   
        current assets of discontinued operations
                                       2,000  7,000 36,000 51,000 230,000 80,000 230,000 8,449,000 8,449,000 7,486,000 7,397,000 7,206,000 6,962,000 6,979,000 3,756,000 4,460,000 4,073,000 7,788,000 7,578,000 7,562,000 7,777,000 7,631,000 8,275,000 8,240,000 9,507,000                      
        net property, plant and equipment, at cost
                                      4,898,525,000                                                
        intangible assets, net of amortization
                                      77,001,000 78,636,000  51,569,000                                             
        current liabilities of discontinued operations
                                      78,000 94,000  80,000 40,000 70,000 82,000 38,000 82,000 3,310,000 3,310,000 3,309,000 3,176,000 3,217,000 3,176,000 3,341,000 3,249,000 3,969,000 3,647,000 5,205,000 5,156,000 5,198,000 5,171,000 5,170,000 5,882,000 5,918,000 7,688,000                      
        noncurrent liabilities of discontinued operations
                                      14,691,000 4,470,000  3,225,000 4,654,000 4,356,000 4,110,000 3,984,000 4,110,000 5,139,000 5,139,000 4,177,000 4,221,000 3,989,000 3,786,000 3,638,000 507,000 491,000 426,000 2,583,000 2,422,000 2,364,000  2,461,000 2,393,000                        
        net property, plant and equipment, at cost:
                                       4,950,400,000                                               
        accounts receivable, net of reserve
                                        76,641,159,964,714,480,000,000                                              
        intercompany
                                        908,851,746,662,248,600,000                                              
        investment in subsidiaries
                                        5,470,050,183,382,000                                              
        assets held for sale
                                          26,801,000 45,297,000  21,772,000                         5,724,000   633,000  3,879,000           
        property, plant and equipment, at cost:
                                         5,062,914,000 5,061,368,000                                            
        long-term debt due within one year less unamortized debt issuance costs
                                            39,144,000 39,234,000 39,144,000 39,092,000 39,092,000 39,207,000  39,635,000                                   
        short-term debt
                                                  1,002,000                105,000,000 105,000,000 105,000,000                  
        long-term debt due within one year
                                                  40,000,000  115,000,000 115,000,000 115,000,000 40,000,000 40,000,000 40,000,000 115,000,000 115,000,000 115,000,000       25,000,000 25,000,000 25,000,000    25,000,000 25,000,000 25,000,000           
        non-current liabilities of discontinued operations
                                                            2,606,000   2,322,000 1,819,000                      
        non-current assets of discontinued operations
                                                                                      
        notes payable
                                                                      2,259,000     13,721,000 2,326,000   379,000   3,000,000 25,000,000 30,000,000 30,000,000 
        long-term notes payable
                                                                    430,000,000 490,000,000 455,000,000 480,000,000 485,000,000 380,000,000 330,000,000 205,000,000 200,000,000 200,000,000 200,000,000 200,000,000 200,000,000 200,000,000 200,000,000 200,000,000 200,000,000 200,000,000 
        deferred income tax
                                                                     15,606,000 18,350,000 17,534,000 12,572,000 13,638,000 11,301,000 8,624,000 9,978,000 7,535,000 7,038,000 5,344,000 4,751,000 4,346,000     
        short term investments
                                                                         396,000 344,000 333,000 102,835,000 81,398,000         
        unearned compensation
                                                                               -141,000 -149,000 -157,000    -10,000 
        shareholders’ equity
                                                                                      
        preferred stock, 1,000,000 shares authorized; no shares issued
                                                                                      
        authorized common 80,000; issued 53,529
                                                                              5,353,000    5,353,000 5,353,000   
        preferred stock, no shares issued
                                                                                      
        income tax receivable
                                                                                  35,080,000 44,160,000   
        less treasury stock, at cost, 3,120 shares and 3,389 shares at june 30, 2004 and september 30, 2003, respectively
                                                                                  42,215,000    
        less treasury stock, at cost, 3,142 shares and 3,389 shares at march 31, 2004 and september 30, 2003, respectively
                                                                                   42,515,000   
        less treasury stock, at cost
                                                                                    45,327,000  
        contract drilling equipment
                                                                                     1,490,389,000 
        construction in progress
                                                                                     45,004,000 
        real estate properties
                                                                                     56,247,000 
        property, plant and equipment, at cost: - sum
                                                                                     1,679,210,000 
        less-accumulated depreciation and amortization
                                                                                     621,005,000 
        september 30,
                                                                                     2,003,000 
        shareholders’ equity: - sum
                                                                                     963,089,000 
      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 2016-03-31 2015-12-31 2015-06-30 2015-03-31 2014-12-31 2014-06-30 2014-03-31 2013-12-31 2013-06-30 2013-03-31 2012-12-31 2012-06-30 2012-03-31 2011-12-31 2011-06-30 2011-03-31 2010-12-31 2010-06-30 2010-03-31 2009-12-31 2009-06-30 2009-03-31 2008-12-31 2008-06-30 2008-03-31 2007-12-31 2007-06-30 2007-03-31 2006-12-31 2006-06-30 2006-03-31 2005-12-31 2005-06-30 2005-03-31 2004-12-31 2004-06-30 2004-03-31 2003-12-31 
                                                                                    
          cash flows from operating activities:
                                                                                    
          net income
        -55,861,000 -94,931,000 -55,807,000 -161,899,000 2,986,000 54,772,000 75,476,000 88,685,000 84,831,000 95,173,000 77,622,000 95,293,000 164,040,000 97,145,000        -70,431,000   -420,540,000 30,605,000 41,177,000 -154,683,000 60,891,000 18,959,000 2,453,000 -8,008,000 -11,879,000 500,106,000 -22,532,000 -21,799,000 -48,818,000 -35,063,000 21,205,000 16,002,000 90,860,000 149,537,000 203,042,000 192,279,000 174,570,000 173,182,000 266,159,000 151,080,000 159,603,000 149,925,000 129,719,000 144,286,000 109,826,000 98,790,000 104,150,000 -36,715,000 46,747,000 63,235,000 53,044,000 103,738,000 145,275,000 125,369,000 102,054,000 107,830,000 115,204,000 106,861,000 110,786,000 79,975,000 64,573,000 50,814,000 29,825,000 22,350,000 39,310,000 4,347,000 6,048,000 5,629,000 
          adjustments to reconcile net income to net cash from operating activities:
                                                                                    
          depreciation and amortization
        180,734,000 181,919,000 188,857,000 179,491,000 157,657,000 99,080,000 100,992,000 97,816,000 104,545,000 93,991,000 94,593,000 94,811,000 96,255,000 96,655,000 99,055,000 100,741,000 102,937,000 100,437,000 101,955,000 104,493,000 106,417,000 106,861,000 109,587,000 110,161,000 132,006,000 130,131,000 134,886,000 143,297,000 143,160,000 141,460,000 150,281,000 144,579,000 145,675,000 143,267,000                                           
          asset impairment charges
        26,101,000 103,086,000 18,928,000 173,258,000       12,097,000                                                             
          amortization of debt discount and debt issuance costs
        1,277,000 1,250,000 1,270,000 1,337,000 1,072,000 2,390,000     148,000 267,000 342,000 322,000 320,000 321,000 320,000 239,000 429,000 74,000 460,000 460,000 459,000 458,000 456,000 444,000 556,000 424,000 423,000 329,000 269,000 267,000 265,000 266,000 266,000 264,000 262,000 263,000 303,000 255,000 298,000                                    
          stock-based compensation
        10,387,000 9,287,000 8,757,000 7,888,000 8,098,000 6,851,000 7,421,000 7,676,000 8,429,000 7,672,000 8,572,000 8,180,000 7,431,000 8,273,000 6,818,000 7,051,000 7,945,000 6,218,000 6,618,000 6,963,000 6,826,000 7,451,000 4,270,000 11,107,000 10,751,000 10,201,000 8,825,000 8,878,000 9,431,000 7,158,000 8,215,000 7,926,000 8,459,000 7,087,000 6,936,000 6,768,000 6,578,000 5,901,000 6,066,000 7,921,000 6,041,000 6,097,000 6,982,000 8,285,000 5,794,000 7,010,000 5,745,000 5,698,000 6,028,000 4,542,000 4,836,000 3,922,000 2,970,000 2,957,000 3,187,000 2,949,000 2,917,000 7,008,000 2,054,000 2,038,000 2,200,000 1,898,000 1,653,000 2,059,000 1,719,000 1,725,000 1,835,000 1,544,000 3,867,000 2,720,000       
          gain on investment securities
              -13,851,000    -5,176,000 18,538,000    14,310,000 -22,132,000 -47,862,000    -2,924,000                                                       
          gain on reimbursement of drilling equipment
        -5,943,000 -6,120,000 -7,249,000 -6,773,000 -9,973,000 -9,403,000 -8,622,000 -9,732,000 -7,461,000 -7,494,000 -10,233,000 -10,642,000 -11,574,000 -15,724,000 -7,846,000 -9,895,000 -6,448,000 -5,254,000                                                           
          other loss on sale of assets
        -1,305,000 1,926,000 -595,000 1,347,000 -884,000 1,673,000 2,421,000      -2,519,000 -2,379,000 -2,670,000 -3,075,000 -716,000 1,029,000                                                           
          deferred income tax
        -13,171,000 7,182,000                                                                           
          other
        -1,384,000 -2,345,000 8,207,000 3,881,000 2,332,000 -381,000 2,121,000 1,381,000 2,486,000 -856,000 5,023,000 1,932,000 -5,668,000 7,692,000 9,298,000 761,000 255,000 -3,781,000 4,945,000 5,203,000 2,188,000 1,458,000 2,691,000 888,000 -3,640,000 -139,000 -10,604,000 8,565,000 -3,377,000 168,000 2,975,000 -1,966,000 1,902,000 3,799,000 481,000 30,000 22,000 10,000 -128,000 233,000       384,000 771,000 1,000 132,000      -13,000     1,000             43,000   
          change in assets and liabilities
                                                                                    
          accounts receivable
        -83,038,000 54,484,000 -50,897,000 3,629,000 5,074,000 -6,404,000 -3,808,000 16,124,000 5,871,000 -28,931,000 49,752,000 77,209,000 -12,784,000 -57,896,000 -61,937,000 -69,874,000 -49,110,000 -54,641,000 4,659,000 -24,577,000 24,088,000 -32,586,000 111,527,000 226,997,000 -34,448,000 -3,269,000 7,321,000 49,360,000 -6,058,000 19,700,000   -8,013,000 -53,778,000 -34,172,000 -93,220,000 -15,770,000 46,048,000 43,139,000 72,083,000 133,519,000       -26,855,000 40,314,000    -11,034,000 -20,783,000 45,259,000    140,607,000 -440,000 2,259,000            -7,238,000    
          inventories of materials and supplies
        -5,139,000 -388,000 -9,313,000 -6,435,000 -1,603,000 -9,500,000 -169,000 -6,799,000 -6,605,000 -7,191,000 6,073,000 -1,783,000 -9,109,000 -3,007,000 -2,746,000 -2,640,000 2,665,000 -2,507,000 5,774,000 6,914,000 2,547,000 4,612,000 8,854,000 -277,000 -2,345,000 965,000 348,000 4,741,000 -1,410,000 -1,858,000                                               
          prepaid expenses and other
        1,762,000 14,160,000 98,314,000 -4,325,000 -53,501,000 1,034,000 7,412,000 -6,904,000 11,266,000 -8,404,000 25,786,000 -11,202,000 -7,711,000 -8,676,000 -2,985,000 13,277,000 -8,167,000 4,099,000 -19,762,000 6,313,000 -2,016,000 -5,935,000 -8,557,000 19,013,000 3,737,000 -19,699,000 9,380,000 -13,516,000 4,169,000 -209,000   4,404,000 -8,562,000 4,614,000 8,990,000 10,542,000 7,288,000      -16,415,000 1,812,000 20,003,000 -15,482,000 1,587,000 29,459,000     -873,000 4,910,000               -12,336,000 -890,000 2,699,000 -4,238,000 -174,000   
          other noncurrent assets
        2,039,000 3,383,000 3,151,000 2,325,000 -9,002,000 -7,933,000 -575,000 -10,796,000 -8,219,000 -1,150,000 -7,722,000 -2,353,000 686,000 -1,746,000 752,000 -8,546,000 6,445,000 3,930,000 6,109,000 359,000 -5,325,000 1,629,000 -2,523,000 -4,764,000 3,740,000 6,367,000 -4,531,000 -1,297,000                                                 
          accounts payable
        -15,824,000 -28,457,000 -20,238,000 -27,470,000 21,870,000 4,492,000 -24,250,000 4,454,000 -6,360,000 23,865,000 -20,171,000 -9,202,000 23,160,000 10,450,000 6,467,000 14,637,000 -3,903,000 36,041,000 6,119,000 -369,000 15,539,000 9,738,000 6,756,000 -37,934,000 23,344,000 -1,580,000 -9,423,000 2,915,000 -10,651,000 8,012,000   -4,122,000 -8,997,000 -1,986,000 10,039,000 15,476,000 15,883,000              18,383,000        -5,603,000 20,611,000    16,787,000 4,147,000 30,773,000 -587,000 11,082,000 -6,333,000 4,730,000 2,752,000 -6,323,000 2,111,000   
          accrued liabilities
        16,264,000 -53,270,000 -1,723,000 -43,833,000 -37,966,000 8,915,000 9,054,000 23,595,000 -34,873,000 19,022,000 5,227,000 27,248,000 -63,373,000 20,759,000 22,558,000 51,833,000 -11,730,000 -17,592,000 25,314,000 9,094,000 6,223,000 -6,674,000 -20,236,000 -50,032,000 -60,053,000 -8,093,000 32,777,000 8,566,000 2,463,000 -2,919,000   -6,906,000 15,324,000 17,336,000 23,423,000   -23,111,000 74,170,000      38,705,000   64,251,000   791,000      29,999,000  -12,282,000 21,834,000   21,193,000 -2,998,000 -34,890,000 43,682,000 20,954,000 -20,306,000 26,290,000 4,735,000 -5,412,000 4,742,000 -2,456,000   
          other noncurrent liabilities
        -5,929,000 -7,808,000 2,839,000 29,174,000 20,220,000 9,328,000 4,308,000 -2,704,000 311,000 -5,966,000 2,610,000 -26,000 -1,218,000 4,224,000 -756,000 -4,968,000 1,898,000 -18,675,000 -5,421,000 -2,792,000 5,105,000 1,834,000 7,702,000 -511,000 -2,780,000 -2,184,000 8,303,000 -726,000 4,344,000 -9,670,000   4,373,000 -17,645,000 -4,870,000 10,111,000     10,240,000 21,105,000 9,727,000          -10,022,000 2,132,000 8,267,000 -2,158,000 -571,000 3,681,000   856,000 2,677,000 4,375,000 1,474,000    -1,019,000 610,000 2,032,000 1,576,000 1,855,000 2,768,000 6,949,000   
          net cash from operating activities
        36,579,000 182,429,000 206,950,000 121,596,000 56,046,000 158,358,000 168,756,000 197,390,000 143,719,000 174,798,000 214,682,000 292,746,000 140,879,000 185,375,000 117,272,000 97,745,000 22,614,000 -3,718,000 46,619,000 31,019,000 78,406,000 -19,604,000 92,628,000 213,611,000 120,861,000 111,781,000 196,380,000 250,353,000 199,536,000 209,482,000 186,110,000 161,427,000 124,779,000 72,215,000 121,083,000 89,775,000     334,955,000 422,892,000 389,692,000 257,884,000 235,153,000 304,858,000 267,330,000 152,391,000 341,922,000 174,156,000 202,184,000 236,638,000 244,696,000 213,092,000 238,655,000 127,105,000 85,782,000 120,150,000 220,055,000 235,909,000 254,579,000 180,333,000 152,364,000 110,891,000 139,534,000 108,047,000 137,818,000 80,115,000 77,326,000 60,474,000 55,586,000 44,413,000 33,676,000 37,067,000   
          cash flows from investing activities:
                                                                                    
          capital expenditures
        -62,860,000 -67,565,000 -64,141,000 -96,998,000 -158,749,000 -106,485,000 -105,977,000 -134,384,000 -118,300,000 -136,411,000 -113,670,000 -100,311,000 -85,452,000 -96,027,000 -75,936,000 -70,476,000 -60,468,000 -44,014,000 -32,975,000 -18,428,000 -16,760,000 -13,985,000 -19,835,000 -26,648,000 -48,291,000 -46,021,000 -54,832,000 -73,590,000 -133,886,000 -196,094,000 -143,926,000 -131,456,000 -99,504,000 -91,698,000 -97,292,000 -124,972,000     -53,654,000 -31,389,000 -13,323,000 -9,370,000 -17,879,000   
          free cash flows
        -26,281,000 114,864,000 142,809,000 24,598,000 -102,703,000 51,873,000 62,779,000 63,006,000 25,419,000 38,387,000 101,012,000 192,435,000 55,427,000 89,348,000 41,336,000 27,269,000 -37,854,000 -47,732,000 13,644,000 12,591,000 61,646,000 -33,589,000 72,793,000 186,963,000 72,570,000 65,760,000 141,548,000 176,763,000 65,650,000 13,388,000 42,184,000 29,971,000 25,275,000 -19,483,000 23,791,000 -35,197,000     334,955,000 422,892,000 389,692,000 257,884,000 235,153,000 304,858,000 267,330,000 152,391,000 341,922,000 174,156,000 202,184,000 236,638,000 244,696,000 213,092,000 238,655,000 127,105,000 85,782,000 120,150,000 220,055,000 235,909,000 254,579,000 180,333,000 152,364,000 110,891,000 139,534,000 108,047,000 137,818,000 80,115,000 77,326,000 6,820,000 24,197,000 31,090,000 24,306,000 19,188,000   
          purchase of short-term investments
        -17,149,000 -18,019,000 -5,379,000 -9,168,000 -6,554,000 -95,956,000 -52,202,000 -73,702,000 -28,499,000 -46,250,000 -78,853,000 -37,722,000 -22,777,000 -41,641,000 -55,791,000 -40,753,000 -21,482,000 -47,083,000     -56,338,000 -41,967,000 -7,388,000 -28,948,000 -25,800,000 -29,446,000 -11,082,000 -31,324,000 -18,890,000 -15,375,000 -20,601,000 -16,183,000 -20,908,000 -11,059,000                                         
          purchase of long-term investments
          -1,241,000 -594,000 -815,000 -646,000 47,000 -1,154,000 -7,722,000 -291,000 -1,935,000 -42,000 -2,534,000 -16,237,000 -4,031,000 -33,086,000 -5,109,000 -9,015,000                                                           
          payment for acquisition of business, net of cash acquired
          2,780,000                       -13,382,000 -2,781,000 -54,000 -47,832,000                                          
          proceeds from sale of short-term investments
        16,547,000 16,645,000 5,325,000 8,950,000 121,158,000 242,920,000 52,118,000 64,912,000 29,166,000 57,956,000 46,660,000 50,907,000 56,986,000 40,758,000 82,962,000 44,310,000 79,679,000 37,777,000     28,613,000 22,139,000 18,894,000 25,000,000 18,750,000 10,000,000 26,155,000 31,860,000 16,306,000 20,450,000 13,900,000 18,120,000 16,299,000 19,150,000                                        
          insurance proceeds from involuntary conversion
          1,668,000 698,000 553,000                                                   264,000 277,000 5,426,000 8,500,000 5,900,000 4,840,000 330,000          
          proceeds from asset sales
        10,783,000 11,020,000 10,853,000 8,833,000 13,970,000 12,120,000 11,264,000 14,250,000 8,969,000 11,929,000 7,037,000 15,330,000 16,740,000 30,978,000 12,044,000 15,316,000 13,461,000 21,483,000 16,740,000 13,356,000 6,583,000 6,836,000 47,199,000 6,401,000 12,921,000 11,878,000 14,590,000 11,668,000 12,950,000 11,609,000 16,332,000 10,223,000 9,077,000 8,749,000 5,491,000 4,462,000 12,250,000 1,209,000 3,657,000 6,058,000 2,591,000 8,089,000 7,125,000 8,164,000 5,408,000 7,913,000 5,578,000 8,737,000 7,414,000 6,295,000 15,388,000 10,155,000 4,716,000 13,994,000 3,028,000 2,347,000 1,464,000 2,486,000 2,373,000 2,922,000 1,411,000 2,409,000 2,282,000 1,386,000 7,579,000 37,266,000 681,000 2,099,000 6,455,000 1,468,000 909,000      
          net cash from investing activities
        -54,029,000 -58,293,000 -52,832,000 -56,987,000 -1,868,174,000 52,651,000 -104,750,000 -129,525,000 -111,406,000 -113,067,000 -131,540,000 -71,838,000 -37,037,000 -82,169,000 -44,169,000 -77,825,000 -592,000 -44,729,000 -42,242,000 -59,437,000 4,888,000 -65,203,000 -861,000 -40,074,000 -23,915,000 -23,035,000 -48,675,000 -81,368,000 -105,863,000 -186,730,000 -130,178,000 -116,158,000 -97,182,000 -128,844,000 -96,410,000 -182,835,000                                  -49,126,000 -28,480,000 -16,578,000 78,183,000 -17,506,000   
          cash flows from financing activities:
                                                                                    
          dividends paid
        -25,421,000 -25,238,000 -25,201,000 -25,206,000 -25,307,000 -25,021,000 -42,042,000 -42,046,000 -42,077,000 -42,294,000 -48,877,000 -49,638,000 -51,177,000 -51,764,000 -26,693,000 -26,695,000 -26,687,000 -27,320,000 -27,315,000 -27,585,000 -27,312,000 -26,918,000 -27,211,000 -77,234,000 -78,288,000 -77,602,000 -78,363,000 -78,478,000 -78,458,000 -78,122,000 -78,062,000 -76,935,000 -76,930,000 -76,503,000 -76,454,000 -76,444,000                                  -4,291,000 -4,227,000 -4,214,000 -4,166,000 -4,033,000 -4,035,000 -4,015,000 
          distributions to non-controlling interests
        -842,000 -7,000,000                                                                          
          proceeds from debt issuance
                                                                                  
          debt issuance costs
          -1,413,000 -1,216,000                                                                       
          payments for employee taxes on net settlement of equity awards
        -316,000 -5,835,000 -77,000 -152,000 -3,694,000 -6,913,000 -1,000 -3,356,000 -8,820,000 -4,927,000 -9,483,000 10,000 -12,000 -1,390,000 -4,113,000 -2,000 -41,000 -2,119,000 -32,000 -297,000 -3,455,000 2,000 -152,000 -1,000 -6,267,000 -1,136,000 -187,000 -320,000 -5,471,000                                           
          payments on unsecured long-term debt
        -30,000,000 -30,000,000 -127,000,000 -48,000,000                                                                         
          net cash from financing activities
        -58,294,000 -69,788,000 -153,993,000 -90,453,000 344,257,000 -33,150,000 1,182,652,000 -48,046,000 -49,371,000 -98,728,000 -48,877,000 -151,838,000 -162,597,000 -100,557,000 -26,683,000 -26,707,000 -45,305,000 -635,610,000 510,467,000 -28,345,000 -27,312,000 -29,287,000 -31,244,000 -77,532,000 -111,042,000 -77,402,000 -133,840,000 -77,986,000 -78,156,000 -86,347,000 -78,003,000 -73,607,000 -76,497,000 -81,082,000 -76,085,000 -75,899,000     -77,263,000                  5,162,000 37,526,000 10,641,000 1,707,000 2,681,000 37,359,000 47,746,000 111,894,000 3,285,000 2,196,000 8,052,000 1,478,000 726,000 3,094,000 369,000 -25,672,000 -5,648,000 -3,439,000 
          effect of exchange rate changes on cash, cash equivalents and restricted cash
        269,000 -740,000 -1,351,000 7,916,000                                                                         
          net decrease in cash, cash equivalents and restricted cash
           -17,928,000                                                                         
          cash, cash equivalents and restricted cash, beginning of period
        225,900,000                                                                          
          cash, cash equivalents and restricted cash, end of period
        -75,475,000 279,508,000  -17,928,000                                                                         
          supplemental disclosure of cash flow information:
                                                                                    
          cash paid during the period:
                                                                                    
          interest paid
        15,717,000 36,424,000  53,336,000    103,000        91,000 8,125,000 2,673,000 15,064,000 169,000 11,396,000 77,000 11,417,000 71,000 11,394,000 46,000 13,945,000 -440,000 7,094,000 6,140,000                                               
          income tax paid
        28,815,000 17,414,000  63,829,000 96,518,000 4,284,000  58,300,000        2,759,000 536,000 97,000 -636,000 139,000 -31,775,000 -190,000  120,000 42,575,000 934,000  2,086,000 3,417,000 5,710,000                                               
          cash paid for amounts included in the measurement of lease liabilities:
                                                                                    
          payments for operating leases
        9,722,000 7,325,000  29,630,000 7,586,000 3,822,000  3,521,000        3,186,000 2,412,000 3,657,000 3,913,000 4,383,000 4,984,000 3,986,000 4,701,000                                                      
          non-cash operating and investing activities:
                                                                                    
          change in accounts payable and accrued liabilities related to purchases of property, plant and equipment
        3,896,000 -535,000  4,647,000 -5,126,000 12,422,000  6,664,000                                                                     
          loss on investment securities
         -929,000   -27,788,000 13,367,000   -3,747,000 4,034,000    15,091,000     1,126,000 -2,409,000   1,395,000 -2,267,000 12,413,000 -2,821,000  13,271,000 -5,887,000 42,844,000                                               
          net increase in cash, cash equivalents and restricted cash
         53,608,000                                                                           
          deferred income tax benefit
          -14,012,000 -30,336,000 -24,390,000 -9,923,000         8,126,000 -25,017,000 6,153,000 -17,750,000 -23,650,000 -20,034,000 -31,052,000 -15,016,000 -35,189,000    -19,051,000     7,882,000 -2,629,000 -503,744,000                                           
          change in assets and liabilities:
                                                                                    
          proceeds from sale of long-term investments
                                                                                  
          payment of contingent consideration from acquisition of business
                -250,000 -250,000 -250,000 -7,000,000 -250,000 -4,000,000                                                     
          share repurchases
              -3,938,000 -47,364,000 -102,200,000 -105,953,000 -39,060,000 -16,641,000 -60,358,000     -1,000                                                     
          net increase in cash and cash equivalents and restricted cash
             177,859,000 1,246,658,000   -36,997,000 34,265,000   2,649,000     514,844,000   -114,094,000 60,523,000   11,344,000 13,865,000                                                  
          cash and cash equivalents and restricted cash, beginning of period
             1,528,660,000 316,238,000 269,009,000 936,716,000 536,747,000 382,971,000 326,185,000                                               
          cash and cash equivalents and restricted cash, end of period
             1,706,519,000 1,246,658,000 19,819,000 -17,058,000 279,241,000 34,265,000 69,070,000 -58,755,000 271,658,000 46,420,000 -6,787,000 -23,283,000 252,659,000 514,844,000 -56,763,000 55,982,000 422,653,000 60,523,000 96,005,000 -14,096,000 394,315,000 13,865,000 90,999,000 15,517,000 262,590,000                                               
          income tax received
                                                                                    
          loss on extinguishment of debt
                      60,083,000                                                           
          other capital expenditures related to assets held-for-sale
                      -3,417,000 -7,678,000 -6,673,000 -3,877,000                                                           
          payments for early extinguishment of long-term debt
                      -487,148,000                                                           
          make-whole premium payment
                      -56,421,000                                                           
          provision for credit loss
               -303,000 -1,219,000 1,309,000  -1,057,000 -136,000 3,358,000 59,000 353,000 781,000 -112,000 195,000 235,000 238,000 -465,000                                                       
          deferred income tax expense
               -7,701,000 -8,104,000 -7,829,000  1,032,000 2,977,000 188,000           -98,912,000 -7,966,000   7,720,000 1,107,000      6,240,000   -15,292,000 20,169,000 12,679,000 4,637,000 129,548,000 14,914,000 11,808,000 1,943,000 -4,305,000 8,489,000 11,638,000 44,586,000 42,558,000 57,585,000 60,011,000 53,539,000 42,080,000 13,041,000 15,438,000 8,235,000 38,760,000 87,096,000 28,141,000 24,564,000 19,085,000 22,944,000 24,414,000 15,181,000 12,173,000 4,264,000 4,605,000 2,712,000 8,470,000 4,598,000 17,349,000    
          deferred income tax liability
               257,000 137,000 -4,000 3,000 16,000 -711,000 -7,000 258,000 127,000 69,000     16,000 570,000 316,000 6,000 360,000 -149,000 466,000 -306,000                                               
          other gain on sale of assets
                2,431,000 -2,443,000                                                                   
          net decrease in cash and cash equivalents and restricted cash
                       -6,787,000 -23,283,000 -684,057,000           15,517,000 -63,595,000                                               
          advance payment for sale of property, plant and equipment
                                                                                    
          adjustment for loss from discontinued operations
                   -13,000 -139,000 -718,000  -277,000 352,000 31,000   -2,293,000 -7,493,000 -1,683,000 -408,000 72,000 124,000  62,000 10,966,000 -10,595,000   10,246,000 536,000   345,000 509,000    -1,000 15,000      8,000 18,000 44,000 11,000   215,000                      
          income from continuing operations
                   95,280,000 163,901,000 96,427,000        -77,924,000   -420,468,000 30,729,000 41,890,000 -154,621,000 71,857,000 8,364,000 2,175,000 -8,174,000 -1,633,000 500,642,000 -21,711,000 -23,125,000   25,174,000 15,898,000 90,887,000 149,536,000 203,057,000 192,290,000 174,589,000 173,182,000 250,978,000 151,067,000 159,611,000 149,943,000 129,763,000 144,297,000 109,828,000 98,961,000 104,365,000                      
          net cash from operating activities from continuing operations
                   292,752,000 140,908,000 185,397,000 117,285,000 97,763,000 22,643,000 -3,705,000 46,626,000 31,035,000 78,428,000 -19,601,000 92,637,000 213,621,000 120,889,000 111,781,000 196,386,000 250,364,000 199,555,000 209,508,000 186,129,000 161,481,000 124,818,000 72,272,000 121,118,000 89,810,000     334,982,000 422,891,000 389,707,000 257,895,000 235,172,000 304,858,000 267,149,000 152,378,000 341,930,000 174,174,000 202,228,000 236,649,000 244,698,000 213,263,000 238,870,000                      
          net cash from operating activities from discontinued operations
                   -6,000 -29,000 -22,000 -13,000 -18,000 -29,000 -13,000 -7,000 -16,000 -22,000 -3,000 -9,000 -10,000   -6,000 -11,000 -19,000 -26,000 -19,000 -54,000 -39,000 -57,000 -35,000 -35,000   -6,000 104,000       181,000                              
          adjustment for income from discontinued operations
                                      -278,000                      2,000                        
          gain on sale of subsidiary
                              -14,963,000                                                   
          proceeds from sale of subsidiary
                              15,056,000                                                   
          proceeds from stock option exercises
                              4,100,000 152,000 644,000 303,000 1,954,000 1,195,000 3,515,000 753,000 892,000                                           
          net loss
                       17,752,000 -4,976,000 -51,362,000 -79,161,000 -55,555,000                                                         
          loss from continuing operations
                       17,475,000 -4,624,000 -51,331,000 -79,534,000 -56,705,000                                                         
          adjustments to reconcile net loss to net cash from operating activities:
                                                                                    
          asset impairment charge
                       4,363,000  2,130,000                                                        
          changes in accounts payable and accrued liabilities related to purchases of property, plant and equipment
                       -1,829,000 -611,000 -1,820,000 -780,000 550,000 -927,000 -369,000 872,000 2,062,000 1,528,000 -1,339,000 1,492,000 3,545,000 4,026,000 8,708,000                                               
          changes in accounts receivable, property, plant and equipment and other noncurrent assets related to the sale of equipment
                          9,290,000                                                       
          cumulative effect adjustment for adoption of asu no. 2016-13
                          -1,251,000                                                       
          provision for obsolete inventory
                        -53,000 -708,000   207,000 216,000                                                       
          gain on sale of assets
                             -12,336,000 -27,985,000 -4,201,000 -10,310,000 -4,279,000 -12,641,000                                           -973,000 -603,000 -971,000 -10,816,000    
          purchase of investments
                          -180,817,000 -130,053,000 -11,580,000 -95,151,000                                                      
          proceeds from sale of investments
                          68,286,000 75,688,000 26,645,000 37,097,000                                        17,738,000   28,126,000 207,000 84,605,000 18,276,000 2,000,000 3,060,000   62,397,000   3,462,000 
          loss on sale of assets
                           -3,434,000                                                         
          provision for bad debt
                              -1,948,000   -2,069,000    873,000  169,000 376,000 53,000   1,470,000 2,350,000  6,000         2,000 2,000   1,000                      
          proceeds from sale of marketable securities
                                                                                    
          income tax paid (refund)
                                                                                    
          restructuring charges
                                                                                    
          debt issuance costs paid
                                   -3,912,000                                               
          provision for (recovery of) bad debt
                                                                                    
          change in assets and liabilities increasing (decreasing) cash:
                                                                                    
          operating cash flows for operating leases
                                4,749,000 4,877,000                                                   
          benefit from bad debt
                                                      -11,000        1,000 1,000 2,000  7,000 8,000 8,000 7,000 681,000             
          pension settlement charge
                                          229,000                                          
          payments for early extinguishment of long term debt
                                                                                    
          share repurchase
                                                                                    
          gain from sale of assets
                                    -11,545,000 -5,545,000                                               
          payments on long-term debt
                                                                                    
          net increase in cash and cash equivalents
                                          -51,412,000 -168,959,000     51,791,000   -35,051,000 3,565,000 133,546,000 307,487,000 -68,153,000 145,051,000    47,380,000 66,861,000 110,804,000   11,567,000 15,327,000 -11,646,000 16,511,000 8,282,000 -6,771,000 8,292,000 -18,578,000 16,052,000 39,235,000   12,826,000 27,832,000 30,929,000 112,228,000   -2,692,000 
          cash and cash equivalents, beginning of period
                                      521,375,000 905,561,000 729,384,000 360,909,000 447,868,000 96,095,000 364,246,000 63,020,000 -45,344,000 141,486,000 121,513,000 89,215,000 33,853,000 288,752,000 65,296,000 38,189,000 
          cash and cash equivalents, end of period
                                      -22,071,000 -28,338,000 -48,900,000 383,664,000 -51,412,000 -168,959,000 -84,147,000 825,893,000 49,783,000 848,230,000 51,791,000 467,491,000 251,636,000 -35,051,000 3,565,000 581,414,000 307,487,000 -68,153,000 241,146,000 -175,519,000 -23,474,000 347,859,000 47,380,000 66,861,000 173,824,000 -47,995,000 -27,341,000 153,053,000 15,327,000 -11,646,000 138,024,000 8,282,000 -6,771,000 97,507,000 -18,578,000 16,052,000 73,088,000 -81,054,000 -106,423,000 301,578,000 27,832,000 30,929,000 177,524,000 -6,111,000 -4,939,000 35,497,000 
          income tax refund
                                                                                    
          operating activities:
                                                                                    
          gain from sale of property, plant and equipment
                                                                                    
          increase in accounts receivable
                                                                                    
          increase in inventories
                                                                                    
          decrease in prepaid expenses and other
                                                                                    
          increase in accounts payable
                                                                                    
          increase in accrued liabilities
                                                                                    
          decrease in deferred income tax liability
                                                                                    
          decrease in other noncurrent liabilities
                                                                                    
          investing activities:
                                                                                    
          financing activities:
                                                                                    
          net decrease in cash and cash equivalents
                                       -28,338,000 -48,900,000 -137,711,000                                        -6,111,000   
          income from asset sales
                                        -5,255,000 -5,565,000 -3,034,000 -1,862,000                                         
          inventories
                                        -4,111,000 -1,862,000 1,199,000 -4,533,000    1,299,000                              -345,000 651,000 -848,000 915,000 950,000   
          deferred income taxes
                                        -7,967,000 1,987,000 109,000 193,000   -907,000 3,487,000           92,000 113,000 -34,000 12,000 231,000    -428,000 3,058,000 3,884,000 3,530,000 2,108,000 2,136,000 1,349,000 1,559,000 857,000 2,104,000 2,829,000 376,000 2,082,000 4,371,000 1,434,000 211,000   
          benefit from (recovery of) bad debt
                                                                                    
          deferred income tax (benefit) expense
                                                                                    
          proceeds from senior notes, net of discount
                                                                                    
          proceeds on short-term debt
                                                1,002,000                                  
          payments on short-term debt
                                                                                    
          repurchase of common stock
                                                                                    
          exercise of stock options, net of tax withholding
                                          76,000 512,000 119,000 9,827,000                                       
          tax withholdings related to net share settlements of restricted stock
                                          -169,000                                         
          excess tax benefit from stock-based compensation
                                          293,000 202,000 216,000 3,703,000   208,000 38,000 2,723,000 3,637,000 11,961,000 10,126,000 375,000 1,352,000 5,693,000 92,000 738,000 2,426,000 536,000 8,083,000 2,733,000 1,419,000 248,000 1,649,000 1,170,000 2,000 17,000 18,706,000 5,448,000 662,000 1,099,000 122,000 33,000 3,725,000 4,243,000 2,051,000       
          adjustment for (income) income from discontinued operations
                                                                                    
          depreciation
                                           145,043,000 152,777,000 133,847,000 141,517,000 142,129,000 144,295,000 149,708,000 137,613,000 128,978,000 123,963,000 120,237,000 117,790,000 112,433,000 106,599,000 95,182,000 90,934,000 86,288,000 79,109,000 76,161,000 73,180,000 60,820,000 65,795,000 62,803,000 61,043,000 57,113,000 54,772,000 51,210,000 51,872,000 43,984,000 38,125,000 32,952,000 30,151,000 25,076,000 23,385,000 22,923,000 23,419,000 23,950,000 23,262,000 23,934,000   
          provision (recovery) for bad debt
                                                                                    
          net cash provided by operating activities from continuing operations
                                             70,687,000  308,092,000                                     
          net cash provided by operating activities
                                             70,668,000  308,196,000                                     
          proceeds from sales of short-term investments
                                             13,900,000 17,076,000 4,600,000                                     
          net increase (decrease) in cash and cash equivalents
                                               118,846,000                                     
          net increase in bank overdraft
                                                -1,736,000                                    
          gain on sale of investment securities
                                                                             -2,584,000      
          proceeds from sale of investment securities
                                                   25,867,000   214,119,000 18,102,000                            
          proceeds from senior notes, net of discount and debt issuance costs
                                                -868,000                                    
          adjustments to reconcile net income to net cash provided by operating activities:
                                                                                    
          net cash from investing activities from continuing operations
                                                                                    
          net cash from investing activities from discontinued operations
                                                                                    
          exercise of stock options
                                                   2,669,000 11,500,000 8,201,000 1,212,000 4,433,000 473,000 479,000 1,522,000 373,000 2,619,000 8,127,000 2,988,000                      
          increase in bank overdraft
                                                                    2,330,000                
          change in assets and liabilities-
                                                                                    
          acquisition of terravici drilling solutions
                                                                                    
          proceeds from line of credit
                                                            10,000,000 125,000,000    1,110,000,000 920,000,000 920,000,000 880,000,000 830,000,000             
          payments on line of credit
                                                                                    
          decrease in bank overdraft
                                                                                    
          equity in income of affiliate before income taxes
                                                                             -895,000       
          gain from involuntary conversion of long-lived assets
                                                                                    
          decrease in notes payable
                                                                                    
          proceeds from exercise of stock options
                                                                  281,000 129,000 300,000 5,983,000 6,919,000 1,365,000 2,405,000 401,000 471,000 481,000 8,142,000 3,718,000 4,574,000 7,308,000 4,535,000 361,000 3,387,000 576,000 
          proceeds from lines of credit
                                                                 435,000,000                   
          payments on lines of credit
                                                                                    
          acquired in-process research and development
                                                                                    
          acquisition of business, net of cash acquired
                                                                                    
          increase (decrease) in notes payable
                                                                                    
          increase in notes payable
                                                                          10,000,000          
          income from sale of assets
                                                                                    
          other-net
                                                                             -2,000 -2,000 -344,000 -4,000    
          non-cash charges
                                                                        -76,000            
          change in assets and liabilities- accounts receivable
                                                                                    
          increase in long-term debt
                                                                        50,000,000 125,000,000 30,000,000          
          accounts receivables
                                                                             -23,925,000 -17,677,000   -276,000   
          amortization of deferred compensation
                                                                              8,000 8,000 3,000   
          non-monetary investment gain
                                                                                    
          income tax receivable
                                                                                 -9,939,000   
          increase in short-term notes
                                                                                    
          equity in (income) loss of affiliate before income taxes
                                                                                    
          payment of short-term notes
                                                                                    
          equity in loss of affiliate before income taxes
                                                                                -1,139,000    
          gain on sale of securities
                                                                                -26,349,000   
          non-monetary investment loss
                                                                                    
          proceeds from sales of property, plant and equipment
                                                                                25,156,000 373,000 1,612,000 1,295,000 
          equity in income of affiliates before income taxes
                                                                                    
          gain on sale of property, plant & equipment
                                                                                 -101,000   
          proceeds from sale of securities
                                                                                   
          proceeds from long-term debt
                                                                                    
          decrease (increase) in short-term notes
                                                                                    
          equity in loss of affiliates before income taxes
                                                                                    
          proceeds from notes payable
                                                                                    
          adjustments to reconcile income from continuing operations to net cash from operating activities:
                                                                                    
          proceeds from sale of property, plant and equipment
                                                                                    
          payments on notes payable
                                                                                    
          purchases of stock for treasury
                                                                                    
          discontinued operations:
                                                                                    
          cash of discontinued operations at spinoff