7Baggers

SM Energy Company
(NYSE:SM) 

SM stock logo

SM Energy Company, an independent energy company, engages in the acquisition, exploration, development, and production of oil, natural gas, and natural gas liquids in the state of Texas. As of December 31, 2020, it had 404.6 million barrels of oil equivalent of estimated proved reserves; and working...

Founded: 1908
Full Time Employees: 530
Sector: Energy
Industry: Oil & Gas E&P

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    Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 2006-12-31 2006-09-30 2006-06-30 2006-03-31 2005-12-31 2005-09-30 2005-06-30 2001-03-31 
                                                                                         
      operating revenues and other income:
                                                                                         
      oil, gas, and ngl production revenue
    1,477,000,000 702,295,000 811,009,000 785,076,000 839,620,000 835,858,000 642,380,000 633,451,000 559,596,000 606,857,000 639,699,000 546,555,000 570,778,000 669,250,000 827,558,000 990,377,000 858,721,000 852,368,000 759,813,000 562,569,000 423,165,000 320,153,000 282,012,000 169,790,000 354,233,000 449,001,000 389,419,000 406,854,000 340,476,000 392,531,000 458,382,000 402,558,000 382,886,000 341,187,000 294,459,000 284,939,000 333,198,000 346,296,000 329,165,000 291,142,000 211,823,000 298,719,000 366,615,000 441,256,000 393,315,000 586,567,000 617,207,000 654,661,000 623,109,000 593,668,000 601,787,000 534,520,000 469,575,000 424,737,000 373,928,000 312,608,000 362,595,000 396,914,000 325,231,000 333,934,000 276,313,000                         
      other operating income
    2,000,000 2,627,000 582,000 7,867,000 4,924,000 16,363,000 1,233,000 1,104,000 274,000 1,869,000 1,202,000 4,199,000 2,727,000 2,068,000 7,893,000 1,725,000 1,055,000 2,592,000 426,000 1,280,000 20,681,000                                                                 
      total operating revenues and other income
    1,479,000,000 704,922,000 811,591,000 792,943,000 844,544,000 852,221,000 643,613,000 634,555,000 559,870,000 608,726,000 640,901,000 550,754,000 573,505,000 671,318,000 835,451,000 992,102,000 859,776,000 854,960,000 760,239,000 563,849,000 443,846,000 320,292,000 281,015,000 169,632,000 355,734,000 451,686,000 390,317,000 407,172,000 340,930,000 394,192,000 459,369,000 443,916,000 769,595,000 340,538,000 295,379,000 120,721,000 372,738,000 379,900,000 352,660,000 341,814,000 143,076,000 303,734,000 371,151,000 516,146,000 365,934,000         444,308,000 378,951,000 304,420,000 377,423,000 379,542,000 530,574,000 377,873,000 315,329,000 294,118,000 226,884,000 211,697,000 360,135,000 241,996,000 185,787,000 205,198,000 199,220,000 258,169,000 324,088,000 356,942,000              
      operating expenses:
                                                                                         
      oil, gas, and ngl production expense
    428,000,000 206,883,000 229,036,000 224,008,000 225,073,000 214,594,000 148,380,000 136,622,000 137,375,000 137,343,000 138,264,000 145,588,000 142,348,000 150,667,000 159,961,000 165,593,000 144,691,000 143,285,000 135,745,000 125,456,000 100,930,000 95,963,000 95,257,000 80,445,000 119,552,000 127,312,000 129,042,000 123,050,000 121,305,000 121,450,000 127,638,000 117,400,000 120,879,000 122,833,000 122,651,000 124,376,000 138,046,000 151,907,000 152,524,000 148,591,000 144,543,000 169,229,000 184,568,000 173,685,000 196,151,000 196,181,000 178,390,000 177,598,000 163,709,000 162,754,000 158,921,000 149,737,000 125,633,000 111,159,000 102,447,000 91,134,000 87,132,000 93,204,000 77,753,000 53,342,000 65,812,000                         
      depletion, depreciation, and amortization
    432,000,000 318,738,000 325,372,000 292,990,000 269,900,000                                                                                 
      exploration
    26,000,000 18,350,000 11,532,000 15,355,000 11,763,000 16,349,000 12,097,000 17,094,000 18,581,000 15,847,000 10,245,000 14,960,000 18,428,000 10,826,000 14,203,000 20,868,000 9,046,000 12,550,000 8,709,000 8,714,000 9,323,000 11,314,000 8,547,000 9,787,000 11,349,000 17,649,000 11,626,000 10,877,000 11,348,000 14,322,000 13,061,000 14,056,000 13,727,000 16,886,000 14,243,000 13,072,000 11,978,000 23,699,000 13,482,000 13,187,000 15,273,000 37,942,000 19,679,000 25,541,000 37,407,000 49,696,000 34,556,000 24,270,000 21,335,000 21,769,000 16,280,000 20,657,000 15,398,000 24,217,000 25,417,000 22,007,000 18,607,000 19,950,000 11,272,000 9,603,000 12,712,000 21,027,000 14,437,000 14,498,000 13,898,000 13,414,000 15,733,000 19,490,000 13,598,000 17,743,000 10,669,000 17,401,000 14,308,000 9,017,000 15,257,000 13,643,000 20,769,000 16,017,000 9,766,000 15,319,000 10,787,000 17,457,000 10,692,000 9,699,000 8,362,000 
      general and administrative
    174,000,000 40,247,000 39,317,000 42,097,000 39,339,000 41,913,000 35,141,000 31,112,000 30,178,000 36,639,000 29,255,000 27,500,000 27,669,000 32,843,000 28,428,000 28,291,000 24,996,000 37,062,000 25,530,000 24,639,000 24,714,000 20,034,000 24,452,000 27,227,000 27,447,000 37,213,000 32,578,000 30,920,000 32,086,000 30,438,000 29,464,000 28,920,000 27,682,000 35,021,000 27,880,000 28,460,000 29,224,000 33,311,000 32,679,000 28,200,000 32,238,000 33,642,000 37,782,000 42,605,000 43,639,000 52,241,000 41,696,000 38,115,000 35,051,000 47,977,000 33,920,000 35,374,000 32,280,000 28,372,000 32,171,000 31,130,000 28,142,000 35,568,000 29,787,000 27,310,000 25,861,000 31,560,000 26,219,000 25,398,000 23,486,000 20,687,000 20,790,000 18,160,000 16,399,000 12,354,000 24,145,000 21,867,000 21,128,000 22,201,000 13,110,000 13,697,000 11,141,000 7,933,000 9,725,000 10,429,000 10,786,000 9,517,000 9,772,000 7,481,000 4,021,000 
      net derivative loss
    697,000,000   -78,308,000 17,216,000 20,298,000 -86,283,000 -12,118,000 28,145,000 -80,506,000 75,355,000 -11,674,000 -51,329,000 -11,168,000 -137,577,000 104,236,000 418,521,000 -22,524,000 209,146,000 370,348,000 344,689,000 152,693,000 63,871,000 167,200,000 -545,340,000 101,002,000 -100,889,000 -79,655,000 177,081,000 -411,136,000 178,026,000 63,749,000 7,529,000 115,778,000 80,599,000 -55,189,000                                                  
      other operating expense
    20,000,000 9,811,000 5,331,000 1,893,000 4,965,000 11,575,000 384,000 2,814,000 1,008,000 385,000 2,832,000 7,197,000 10,153,000 879,000 1,213,000 1,096,000 305,000 1,415,000 43,401,000 1,852,000 -599,000 14,651,000 1,562,000 8,046,000                         8,089,000                                     
      total operating expenses
    1,777,000,000 522,600,000 565,109,000 498,035,000 568,256,000 565,253,000 312,661,000 355,175,000 381,475,000 298,815,000 445,304,000 341,403,000 301,458,000 328,660,000 213,170,000 479,296,000 758,040,000 380,549,000 633,982,000 744,473,000 654,767,000 492,339,000 384,147,000 482,311,000 836,826,000 539,989,000 290,840,000 303,005,000 526,239,000 -35,573,000 568,013,000 387,768,000 310,527,000 441,390,000 380,971,000 268,359,000 207,145,000 664,287,000 370,314,000 572,363,000 669,801,000 809,307,000 339,047,000 567,025,000 420,369,000 37,336,000 261,807,000 553,264,000 504,086,000 596,438,000 475,623,000 415,076,000 437,982,000 530,105,000 421,787,000 252,029,000 321,198,000 559,681,000 157,786,000 166,166,000 335,301,000 230,939,000 195,832,000 174,908,000 152,384,000 231,962,000 185,330,000 211,059,000 334,685,000 446,885,000 179,762,000 298,691,000 204,762,000 218,682,000 151,336,000 149,171,000 151,494,000 133,419,000 110,818,000 128,296,000 112,902,000 146,894,000 158,721,000 101,820,000 36,626,000 
      income from operations
    -298,000,000 182,322,000 246,482,000 294,908,000 276,288,000 286,968,000 330,952,000 279,380,000 178,395,000 309,911,000 195,597,000 209,351,000 272,047,000 342,658,000 622,281,000 512,806,000 101,736,000 474,411,000 126,257,000 -180,624,000 -210,921,000 -172,047,000 -103,132,000 -312,679,000 -481,092,000 -88,303,000 99,477,000 104,167,000 -185,309,000 429,765,000 -108,644,000 56,148,000 459,068,000 -100,852,000 -85,592,000 -147,638,000 165,593,000 -284,387,000 -17,654,000 -230,549,000 -526,725,000 -505,573,000 32,104,000 -50,879,000 -54,435,000 558,485,000 356,979,000 121,716,000 128,634,000 40,289,000 137,484,000 144,284,000 46,198,000 -85,797,000 -42,836,000 52,391,000 56,225,000 -180,139,000 372,788,000 211,707,000    36,789,000  -35,217,250 457,000 -5,861,000  -188,716,000 144,326,000 58,251,000 157,340,000 56,565,000 95,351,000 97,983,000 69,512,000 69,273,000 87,222,000 65,085,000 80,686,000 81,000,000 44,583,000 62,754,000 31,721,000 
      yoy
    -207.86% -36.47% -25.52% 5.56% 54.87% -7.40% 69.20% 33.45% -34.42% -9.56% -68.57% -59.18% 167.40% -27.77% 392.87% -383.91% -148.23% -375.74% -222.42% -42.23% -56.16% 94.84% -203.67% -400.17% 159.62% -120.55% -191.56% 85.52% -140.37% -526.13% 26.93% -138.03% 177.23% -64.54% 384.83% -35.96% -131.44% -43.75% -154.99% 353.13% 867.62% -190.53% -91.01% -141.80% -142.32% 1286.20% 159.65% -15.64% 178.44% -146.96% -420.95% 175.40% -17.83% -52.37% -111.49% -75.25%    475.46%    -727.69%  -81.34% -99.68% -110.06%  -433.63% 51.36% -40.55% 126.35% -18.34% 9.32% 50.55% -13.85% -14.48% 95.64% 3.71% 154.36%     
      qoq
    -263.45% -26.03% -16.42% 6.74% -3.72% -13.29% 18.46% 56.61% -42.44% 58.44% -6.57% -23.05% -20.61% -44.94% 21.35% 404.06% -78.56% 275.75% -169.90% -14.36% 22.59% 66.82% -67.02% -35.01% 444.82% -188.77% -4.50% -156.21% -143.12% -495.57% -293.50% -87.77% -555.19% 17.83% -42.03% -189.16% -158.23% 1510.89% -92.34% -56.23% 4.18% -1674.80% -163.10% -6.53% -109.75% 56.45% 193.29% -5.38% 219.28% -70.70% -4.71% 212.32% -153.85% 100.29% -181.76% -6.82% -131.21% -148.32% 76.09%       -7806.18% -107.80%   -230.76% 147.77% -62.98% 178.16% -40.68% -2.69% 40.96% 0.35% -20.58% 34.01% -19.34% -0.39% 81.68% -28.96% 97.83%  
      interest expense
    -113,000,000 -43,129,000 -42,937,000 -42,561,000 -44,373,000 -46,297,000 -50,682,000 -21,807,000 -21,873,000 -23,917,000 -23,106,000 -22,148,000 -22,459,000 -22,638,000 -22,825,000 -35,496,000 -39,387,000 -40,085,000 -40,861,000 -39,536,000 -39,871,000 -40,507,000 -41,519,000 -40,354,000 -41,512,000 -40,911,000 -40,584,000 -39,627,000 -37,980,000 -38,056,000 -38,111,000 -41,654,000 -43,085,000 -43,618,000 -44,091,000 -44,595,000 -46,953,000 -46,356,000 -47,206,000 -34,035,000 -31,088,000 -31,566,000 -33,157,000 -30,779,000 -32,647,000 -27,703,000 -22,621,000 -24,040,000 -24,190,000 -24,541,000 -24,488,000 -21,581,000 -19,101,000 -18,368,000 -18,362,000 -12,712,000 -14,278,000 -12,213,000 -9,372,000   -4,867,250 -6,339,000   -7,532,000 -7,565,000 -7,663,000 -6,096,000 -4,417,000 -5,359,000 -5,528,000 -4,971,000 -6,010,000 -4,082,000       -1,651,000 -2,344,000 -2,274,000 -35,000 
      other non-operating income
    1,000,000           4,763,000 4,470,000 3,310,000 1,163,000 112,000  -267,750 153,000       -547,000 -548,000 -562,000 -317,000 69,000 806,000 1,802,000 409,000                                                     
      income before income taxes
    -410,000,000 141,204,000 204,293,000 252,502,000 232,001,000 181,200,250 297,650,000 263,883,000 163,268,000 155,597,000 176,364,000 191,966,000 254,058,000 323,330,000 600,619,000 410,196,000 61,625,000 434,933,000 85,554,000 -223,157,000 -251,163,000 -198,604,000 -121,261,000 -125,937,000 -510,903,000 -129,761,000 58,345,000 63,978,000 -223,606,000 391,760,000 -172,671,000 16,296,000 416,392,000 -143,403,000 -128,382,000 -190,968,000 118,940,000 -330,613,000 -64,639,000 -264,579,000 -542,085,000 -537,113,000 -1,026,000 -98,211,000 -86,511,000 530,714,000 333,686,000 95,829,000 104,470,000 15,751,000 113,024,000 122,727,000 27,109,000 -104,146,000 -61,072,000 39,684,000 42,017,000 -192,268,000 363,443,000 197,384,000    30,500,000  -40,494,000 -7,018,000 -13,419,000  -193,043,000 139,206,000 52,782,000 152,466,000 50,689,000 91,624,000 94,387,000 63,562,000 65,972,000 85,142,000 64,076,000 80,131,000 39,673,750 42,322,000 60,578,000 31,874,000 
      income tax benefit
    75,000,000     -35,696,500 -57,127,000   -12,904,750 45,979,000   -64,867,000 -119,379,000 -86,711,000  -10,033,000 39,000 162,000 -106,000 33,429,000 22,969,000 36,685,000 99,008,000 27,706,000 -16,111,000 -13,590,000 46,038,000 -82,028,000 36,748,000 901,000  117,145,000 39,270,000 71,061,000 -44,506,000 129,667,000 23,732,000 95,898,000 194,875,000 196,855,000 4,140,000 40,703,000 33,453,000     -8,755,000 -42,334,000   37,008,000 22,736,000  -15,681,000    11,055,000 -24,173,250 -9,346,000   -1,522,000 2,603,000 5,097,000 53,916,000                 
      net income
    -335,000,000 108,978,000 155,088,000 201,665,000 182,269,000 188,278,000 240,523,000 210,293,000 131,199,000 247,111,000 222,343,000 149,874,000 198,552,000 258,463,000 481,240,000 323,485,000 48,764,000 424,900,000 85,593,000 -222,995,000 -251,269,000 -165,175,000 -98,292,000 -89,252,000 -411,895,000 -102,055,000 42,234,000 50,388,000 -177,568,000 309,732,000 -135,923,000 17,197,000 317,401,000 -26,258,000 -89,112,000 -119,907,000 74,434,000 -200,946,000 -40,907,000 -168,681,000 -347,210,000 -340,258,000 3,114,000 -57,508,000 -53,058,000 331,726,000 208,938,000 59,780,000 65,607,000 6,996,000 70,690,000 76,522,000 16,727,000 -67,138,000 -38,336,000 24,889,000 26,336,000 -120,711,000 230,097,000 124,533,000 -18,503,000 37,139,000 15,452,000 18,068,000 126,178,000 990,000 -4,415,000 -8,322,000 -87,623,000 -126,040,000 88,047,000 33,550,000 95,996,000 32,874,000 57,653,000 59,235,000 39,950,000 43,532,000 55,877,000 40,080,000 50,526,000 51,238,000 27,334,000 38,261,000 20,393,000 
      yoy
    -283.79% -42.12% -35.52% -4.10% 38.93% -23.81% 8.18% 40.31% -33.92% -4.39% -53.80% -53.67% 307.17% -39.17% 462.24% -245.06% -119.41% -357.24% -187.08% 149.85% -39.00% 61.85% -332.73% -277.13% 131.96% -132.95% -131.07% 193.00% -155.94% -1279.57% 52.53% -114.34% 326.42% -86.93% 117.84% -28.91% -121.44% -40.94% -1413.65% 193.32% 554.40% -202.57% -98.51% -196.20% -180.87% 4641.65% 195.57% -21.88% 292.22% -110.42% -284.40% 207.45% -36.49% -44.38% -116.66% -80.01% -242.33% -425.02% 1389.11% 589.25% -114.66% 3651.41% -449.99% -317.11% -244.00% -100.79% -105.01% -124.80% -191.28% -483.40% 52.72% -43.36% 140.29% -24.48% 3.18% 47.79% -20.93% -15.04% 104.42% 4.75% 147.76%     
      qoq
    -407.40% -29.73% -23.10% 10.64% -3.19% -21.72% 14.38% 60.29% -46.91% 11.14% 48.35% -24.52% -23.18% -46.29% 48.77% 563.37% -88.52% 396.42% -138.38% -11.25% 52.12% 68.05% 10.13% -78.33% 303.60% -341.64% -16.18% -128.38% -157.33% -327.87% -890.39% -94.58% -1308.78% -70.53% -25.68% -261.09% -137.04% 391.23% -75.75% -51.42% 2.04% -11026.72% -105.41% 8.39% -115.99% 58.77% 249.51% -8.88% 837.78% -90.10% -7.62% 357.48% -124.91% 75.13% -254.03% -5.49% -121.82% -152.46% 84.77% -773.04% -149.82% 140.35% -14.48% -85.68% 12645.25% -122.42% -46.95% -90.50% -30.48% -243.15% 162.44% -65.05% 192.01% -42.98% -2.67% 48.27% -8.23% -22.09% 39.41% -20.67% -1.39% 87.45% -28.56% 87.62%  
      basic weighted-average common shares outstanding
    199,000,000 115,000,000 114,826,000 114,520,000 114,515,000 114,757,000 114,405,000 114,634,000 115,642,000 118,678,000 117,823,000 119,408,000 121,671,000 122,351,000 123,195,000 121,910,000 121,907,000 119,043,000 121,457,000 118,357,000 114,759,000 113,730,000 114,371,000 113,008,000 113,009,000 112,544,000 112,804,000 112,262,000 112,252,000 111,912,000 112,107,000 111,701,000 111,696,000 111,428,000 111,575,000 111,277,000 111,258,000 76,568,000 78,468,000 68,102,000 68,077,000 67,723,000 67,961,000 67,483,000 67,463,000 67,230,000 67,379,000 67,069,000 67,056,000 66,615,000 66,943,000 66,295,000 66,211,000 65,138,000 65,745,000 64,585,000 64,104,000 63,755,000 63,904,000 63,638,000 63,447,000 62,969,000 63,031,000 62,917,000 62,792,000 62,457,000 62,505,000 62,418,000 62,335,000 62,243,000 62,187,000 61,714,000 62,861,000 61,852,000 63,424,000 63,583,000 57,011,000 56,291,000 55,398,000 57,082,000 57,233,000 56,907,000 56,640,000 56,960,000 28,236,000 
      diluted weighted-average common shares outstanding
    199,000,000 115,000,000 115,226,000 114,788,000 114,948,000 115,533,000 114,993,000 115,715,000 116,456,000 119,240,000 118,328,000 120,074,000 122,294,000 124,084,000 124,279,000 124,343,000 124,179,000 123,690,000 123,851,000 118,357,000 114,759,000 113,730,000 114,371,000 113,008,000 113,009,000 112,544,000 113,334,000 112,932,000 112,252,000 113,502,000 112,107,000 113,630,000 112,879,000 111,428,000 111,575,000 111,277,000 111,329,000 76,568,000 78,468,000 68,102,000 68,077,000 67,723,000 68,119,000 67,483,000 67,463,000 68,044,000 68,430,000 68,239,000 68,126,000 67,998,000 68,253,000 67,893,000 67,521,000 65,138,000 65,745,000 67,556,000 67,845,000 67,564,000 67,386,000 66,909,000 63,447,000 64,689,000 64,794,000 64,566,000 64,377,000 62,457,000 62,505,000 62,418,000 62,335,000 63,133,000 63,078,000 62,749,000 64,045,000 64,850,000 64,727,000 65,120,000 64,908,000 65,962,000 64,926,000 66,950,000 67,334,000 66,894,000 66,738,000 66,769,000 28,932,000 
      basic net income per common share
    -1,680,000 5,645,300 1,350 1,760 1,590 1,640 2,100 1,830 1,130 2,120 1,890 1,260 1,630 2,110 3,910 2,650 400 3,590 700   -1,440 -860 -790  -900 370 450 -1,580 2,760 -1,210 150 2,840    670 -2,120 -520   -5,020 50 -850 -790 4,930 3,100 890 980 100 1,060 1,150 250 -1,030 -580 390 410 -1,900 3,600 1,960 -290 590 250 290 2,010 20 -70 -130 -1,410 -2,030 1,420 540 1,530 510 910 930 700 790 1,010 700 880 900 480 670 720 
      diluted net income per common share
    -1,680,000 5,635,310 1,350 1,760 1,590 1,640 2,090 1,820 1,130 2,110 1,880 1,250 1,620 2,090 3,870 2,600 390 3,580 690   -1,440 -860 -790  -900 370 450 -1,580 2,730 -1,210 150 2,810    670 -2,120 -520   -5,020 50 -850 -790 4,890 3,050 880 960 100 1,040 1,130 250 -1,020 -580 370 390 -1,800 3,410 1,860 -290 570 240 280 1,960 20 -70 -130 -1,410 -1,990 1,400 530 1,500 510 890 910 630 690 880 610 760 780 420 590 710 
      net derivative gain
     -71,429,000 -45,479,000                                  -114,774,000                                                 
      interest income
     1,877,000 828,000 182,000 113,000 783,000 18,017,000 6,333,000 6,770,000 6,052,000 4,106,000                             5,000 6,000        26,000 3,000 28,000 24,000 12,000 19,000 126,000 5,000 70,000 84,000 27,000 227,000 128,000 53,000 85,000 54,000 129,000 10,000 90,000 105,000 22,000 90,000 239,000 59,000 97,000 134,000 355,000 154,000 103,000 122,000 90,000 540,000 824,000 193,000 83,000 98,000 188,000 
      other non-operating expense
     -33,500 -80,000 -27,000 -27,000 451,000 -637,000 -23,000 -24,000 -232,000 -233,000      -724,000   -853,000 -371,000 -589,750 -1,680,000 -185,000 -494,000                                                             
      income tax expense
     -32,226,000 -49,205,000 -50,837,000 -49,732,000   -53,590,000 -32,069,000   -42,092,000 -55,506,000    -12,861,000                -98,991,000             -49,915,000 -124,748,000 -36,049,000 -38,863,000   -46,205,000 -10,382,000   -14,795,000  -48,785,500 -133,346,000           67,003,000 -51,159,000 -19,232,000 -56,470,000 -17,815,000 -33,971,000       -28,304,000 -14,988,000 -22,317,000 11,481,000 
      net dividends declared per common share
     150 200 200 200 140 200 180 180                                                                             
      depletion, depreciation, amortization, and asset retirement obligation liability accretion
         137,195,250 202,942,000 179,651,000 166,188,000 189,107,000 189,353,000 157,832,000 154,189,000 143,611,000 145,865,000 154,823,000 159,481,000 200,011,000 202,701,000 204,714,000 166,960,000 188,934,000 181,708,000 180,856,000 233,489,000 228,597,000 211,125,000 206,330,000 177,746,000 181,970,000 201,105,000 151,765,000 130,473,000 131,393,000 134,599,000 153,232,000 137,812,000 171,552,000 193,966,000 211,020,000 214,207,000 240,025,000 243,879,000 219,704,000 217,401,000 219,277,000 183,259,000 187,781,000 177,215,000 202,640,000 195,792,000 225,731,000 198,709,000 204,267,000 192,432,000 161,608,000 169,570,000 167,298,000 123,067,000 115,382,000 105,356,000 94,806,000 83,800,000 79,770,000 77,765,000           54,657,000          
      loss on extinguishment of debt
                   -67,226,000              -6,680,500 -26,722,000             -16,578,000                                          
      dividends declared per common share
             112.5 150                                                                           
      dividends per common share
               150 150 40 150  10 10  10 10  10 25 50  50 25 50  50 25 50  50 25 50  50 25 50  50 25 50  50 25 50  50 25 50  50                             
      impairment
                 1,002,000 1,077,000 4,389,000 1,000,000 8,750,000 8,750,000 8,750,000 8,750,000 8,750,000 8,750,000 8,750,000 989,763,000                                                             
      gain on extinguishment of debt
                 -16,901,250    -534,750 5,000 -2,144,000  66,136,500 25,070,000 227,281,000 12,195,000            -35,000    15,722,000                                             
      basic net loss per common share
                       -1,880 -2,190    -3,640         -230 -800 -1,080    -2,480 -5,100                                             
      diluted net loss per common share
                       -1,880 -2,190    -3,640         -230 -800 -1,080    -2,480 -5,100                                             
      net gain on divestiture activity
                           91,000  539,000  262,000 61,000 1,261,000 786,000 39,501,000 385,369,000 537,000 -1,895,000 -167,133,000 37,463,000 33,661,000 22,388,000 50,046,000  4,534,000 2,415,000 71,884,000                                          
      other operating revenues
                         139,000 -997,000 -249,000 1,501,000 2,146,000 898,000 56,000 393,000 400,000 201,000 1,857,000 1,340,000 -1,186,000 2,815,000 2,915,000 2,077,000 -57,000 1,107,000 626,000 274,000 -9,004,000 2,121,000 3,006,000 8,421,000 -16,289,000 1,579,000 20,319,000 9,611,000 -45,464,000 18,025,000 19,749,000 14,605,000                                 
      other operating expenses
                            566,000 19,466,000 1,021,000 -934,000 335,000 4,109,000 9,664,000 -57,000 4,612,000 7,364,000 999,000 445,000 4,859,000 3,792,000 2,397,000 4,851,000 6,932,000 -3,977,000 7,166,000 10,304,000 17,119,000 -14,847,000 5,444,000 5,972,000  -41,116,000 20,084,000 35,314,000 15,794,000                                 
      abandonment and impairment of unproved properties
                             6,273,000 6,337,000 12,417,000 6,338,000 23,274,000 9,055,000 11,935,000 5,625,000 12,115,000  157,000  74,450,000 3,568,000 38,000 2,311,000 54,597,000 6,600,000 5,819,000 11,627,000 57,151,000 15,522,000 164,000  37,646,000 3,818,000 4,339,000  5,046,000 447,000 10,707,000 142,000 3,051,000  1,237,000 3,079,000 -3,012,000 1,719,000 2,375,000 904,000 25,153,000 4,761,000 11,631,000 3,902,000 34,754,000 1,231,000 2,056,000 1,008,000 870,000 937,000 1,465,000 1,484,000 933,000 920,000 1,262,000 1,186,000 1,274,000 817,000 1,819,000 466,000 
      impairment of proved properties
                                       3,806,000  76,780,000 8,049,000  269,785,000 344,249,000 55,990,000 12,914,000 55,526,000     110,935,000 5,935,000 34,552,000  170,400,000  38,523,000  170,512,000 48,525,000       21,630,000 91,000 6,043,000 147,049,000 292,100,000 564,000 9,566,000      684,000 5,259,000  1,289,000    171,000 
      non-operating income:
                                                                                         
      other
                                     1,067,000 1,301,000 1,265,000 335,000 130,000 221,000   26,000 27,000 25,000 571,000 -68,000 -672,000 -1,847,000                                      
      operating revenues:
                                                                                         
      change in net profits plan liability
                                         -751,000 -8,314,000 3,125,000 -1,260,000 -6,351,000 -4,364,000 -4,476,000 -4,334,000 -14,569,000 -6,399,000 -7,105,000 -1,776,000 -15,419,000 940,000 -5,438,000 -1,925,000 -11,562,000 798,000 -22,079,000 3,939,000 -758,000 -24,930,000  14,195,000 -7,446,250 4,086,000   6,963,000 6,804,000 2,449,000 -23,291,000 -80,941,000 -34,867,000 68,142,000 13,626,000 43,875,000 3,143,000  4,965,000 6,389,000  14,059,000 7,021,000   12,175,000  
      derivative loss
                                         30,271,500 -28,037,000 163,351,000  -71,372,750 -212,253,000 80,929,000 -154,167,000 8,367,500 -190,661,000 126,469,000 97,662,000 -3,671,250 39,933,000                               327,500 -60,000 241,000  
      net loss on divestiture activity
                                            -69,021,000                                             
      derivative gain
                                            -14,228,000                                             
      gain on divestiture activity
                                                -35,802,000       6,280,000  4,228,000 -8,532,000 -24,176,000 1,462,000 -24,986,000 190,728,000 30,019,000 24,915,000   7,021,000  -2,658,000 -11,277,000                   
      total operating revenues
                                                 481,621,500 618,786,000 674,980,000 632,720,000 414,161,750 613,107,000 559,360,000 484,180,000                    362,102,000 275,247,000 246,687,000 247,154,000 221,006,000 202,692,000 198,040,000 193,381,000 193,588,000 227,894,000 203,304,000 164,574,000 68,347,000 
      impairment of properties
                                                    2,801,000    21,521,000                                 
      realized hedge gain
                                                      -489,000 -1,189,000  1,528,000 501,000 185,000 1,652,000 -6,159,000 -6,843,000                           
      loss on divestiture activity
                                                     -127,500 -6,216,000                                   
      unrealized and realized derivative gain
                                                       -85,190,000                                  
      unrealized and realized derivative loss
                                                        30,572,000 -15,590,000 55,856,000 -98,112,000 2,216,000 46,786,000 -128,425,000  88,429,000                         
      nonoperating income:
                                                                                         
      marketed gas system and other operating revenue
                                                         10,142,750 13,054,000 15,803,000 11,714,000 14,296,000 21,458,000 20,250,000 15,476,000 14,908,500 16,499,000 19,460,000 23,675,000 11,315,000 16,082,000 15,396,000 13,782,000   22,339,000 19,603,000             
      marketed gas system and other operating expense
                                                         10,195,000 12,219,000 17,111,000                20,915,000 18,445,000    7,952,000 3,245,250 3,975,000 3,248,000 6,228,000     
      marketed gas system and other expense
                                                            11,450,000 14,436,500 20,737,000 17,152,000 19,857,000                         
      oil and gas production revenue
                                                                 250,160,000 197,354,000 175,887,000 212,887,000 187,606,000 152,651,000 145,279,000 130,417,000 190,499,000 358,508,000 399,961,000 310,432,000 273,736,000 228,497,000 216,154,000 193,706,000 180,556,000 188,159,000 177,957,000 184,065,000 231,609,000 203,144,000 160,421,000  
      realized oil and gas hedge gain
                                                                 2,694,000 8,847,000 9,329,000 2,595,000 13,418,000 28,331,000 43,279,000 55,620,000 44,741,000 -53,491,000 -68,396,000 -23,950,000 -11,676,000 10,173,000 7,303,000 18,684,000         
      gain (loss) on divestiture activity
                                                                 33,045,750 4,184,000  120,978,000                     
      oil and gas production expense
                                                                 56,961,000 44,606,000 45,168,000 48,340,000 52,872,000 48,634,000 49,465,000 55,829,000 65,530,000 72,724,000 73,625,000 59,476,000 60,590,000 54,970,000 50,328,000 52,320,000 47,100,000 44,998,000 43,278,000 41,214,000 42,455,000 38,071,000 30,188,000  
      impairment of materials inventory
                                                                     774,000 2,114,000 2,719,000 8,616,000                 
      marketed gas system expense
                                                                 14,176,000 14,697,000 15,807,000 22,046,000 16,235,000 14,360,000 13,609,000 13,383,000 11,241,000 22,960,000   13,031,000 7,278,000 14,940,000          
      unrealized derivative loss
                                                                 12,994,000 5,727,000   3,218,000 4,117,000 11,288,000 1,846,000 -12,011,000 -4,429,000 -1,186,000 6,417,000 3,234,000 -2,880,000 1,200,000 3,904,000 1,765,000 68,000 4,791,000      
      other expense
                                                                 956,000 541,000 578,000 952,000 1,065,000 968,000 5,814,000 5,642,000 1,260,000 7,753,000   945,000 460,000 401,000      494,000 365,000 1,083,000  
      income (loss) from operations
                                                                 63,179,000 31,052,000  207,751,000    -135,465,000                 
      income (loss) before income taxes
                                                                 58,505,000 24,798,000  201,093,000    -141,539,000                 
      depletion, depreciation, amortization,
                                                                                         
      and asset retirement obligation liability accretion
                                                                     75,140,000 66,958,000 70,391,000 91,712,000 95,260,000 72,362,000 76,354,000 70,354,000 64,919,000 59,061,000           
      bad debt expense
                                                                         143,000 6,650,000 9,951,000              
      gain on sale of proved properties
                                                                       1,244,000    3,038,000 56,017,000     -323,000 801,000 6,432,000  2,000 246,000 -26,000 2,000 
      gain (loss) on sale of proved properties
                                                                        -599,000 9,494,000 -4,992,000               
      marketed gas system revenue
                                                                         11,935,000 24,219,000   13,909,000 7,414,000 15,967,000          
      other revenue
                                                                         1,500,000 -156,000   -355,000 603,000 7,730,000      1,183,000 705,000 714,000  
      depletion, depreciation, amortization
                                                                                         
      nonoperating income
                                                                                         
      marketed gas and other operating revenue
                                                                                8,616,000         
      depletion, depreciation, amortization and asset retirement obligation liability accretion
                                                                                48,959,000         
      oil and gas hedge gain
                                                                                 3,702,000 4,828,000 4,875,000 5,105,000     
      marketed gas and other revenue
                                                                                 3,196,750 4,252,000 4,117,000 4,418,000     
      depletion, depreciation, amortization, and asset retirement obligation accretion
                                                                                 27,529,500 39,817,000       
      depletion, depreciation, amortization, and abandonment liability accretion
                                                                                   35,910,000 34,391,000     
      oil and gas hedge loss
                                                                                     -13,572,000 -8,441,000 -2,086,000  
      marketed gas revenue
                                                                                     8,672,000 7,650,000 5,551,000  
      and abandonment liability accretion
                                                                                     31,825,000 36,952,000 33,907,000  
      change in net profits interest plan liability
                                                                                     17,813,250 54,857,000   
      marketed gas operating expense
                                                                                     3,901,750 7,255,000 5,227,000  
      oil and gas production
                                                                                        67,915,000 
      other oil and gas revenue
                                                                                        362,000 
      other revenues
                                                                                        68,000 
      depletion, depreciation and amortization
                                                                                        11,288,000 
      minority interest and other
                                                                                        261,000 
      nonoperating income and
                                                                                         
    Balance Sheets:
    Quarterly
    Annual
      Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 2006-12-31 2006-09-30 2006-06-30 2006-03-31 2005-12-31 2005-09-30 2005-06-30 2001-03-31 
                                                                                           
        assets
                                                                                           
        current assets:
                                                                                           
        cash and cash equivalents
      449,000,000 368,000,000 162,251,000 101,877,000 54,000  1,735,313,000 487,869,000 506,252,000 616,164,000 401,980,000 378,238,000 477,869,000 444,998,000 498,435,000 267,089,000 419,887,000 332,716,000 29,800,000   10,000 10,000 10,000 15,000 10,000 10,000 12,000 14,000 77,965,000 176,806,000 615,906,000 643,337,000 313,943,000 441,415,000 559,521,000 659,147,000 9,372,000 980,666,000 18,000 51,000 18,000 197,000 82,000 22,000 120,000 269,000 163,794,000 236,435,000 282,248,000 176,000 176,000 87,000 5,926,000 184,000 184,000 286,000 119,194,000 29,923,000 101,080,000 191,294,000 5,077,000 7,089,000 10,249,000 40,424,000 10,649,000 20,517,000 10,389,000 2,211,000 6,131,000 5,396,000 36,919,000 7,511,000 43,510,000 17,240,000 26,179,000 4,733,000 1,464,000 1,016,000 1,825,000 61,062,000 14,925,000 26,597,000 10,568,000 2,782,000 
        accounts receivable
      915,000,000 331,000,000 367,688,000 364,296,000 382,955,000 360,976,000 226,604,000 239,095,000 241,731,000 231,165,000 264,511,000 217,794,000 187,810,000 233,297,000 258,003,000 333,944,000 321,076,000 247,201,000 272,248,000 229,512,000 199,631,000 162,455,000 136,613,000 127,173,000 143,311,000 184,732,000 146,211,000 165,757,000 145,299,000 167,536,000 179,347,000 178,682,000 192,562,000 160,154,000 146,056,000 105,713,000 108,368,000 151,950,000 140,799,000 143,979,000 111,141,000 134,124,000 171,067,000 239,983,000 270,841,000 322,630,000 304,175,000 312,415,000 307,784,000 318,371,000 278,125,000 291,197,000 255,888,000 254,805,000 235,887,000 209,633,000 224,335,000 210,368,000 183,943,000 173,557,000 146,805,000 163,190,000 121,010,000 108,427,000 129,302,000        200,385,000 159,149,000 150,699,000 137,333,000 142,079,000 142,721,000 134,388,000 115,516,000 138,299,000 165,197,000 139,478,000 107,128,000 52,014,000 
        derivative assets
      201,000,000 83,000,000 68,567,000 78,504,000 60,640,000 48,522,000 72,287,000 27,208,000 33,913,000 56,442,000 25,524,000 74,138,000 81,062,000 48,677,000 42,207,000 18,308,000 9,649,000 24,095,000 24,514,000 31,303,000 20,859,000 31,203,000 128,046,000 211,582,000 463,992,000 55,184,000 143,142,000 114,242,000 67,567,000 175,130,000 81,163,000 146,329,000 77,296,000 64,266,000                                                    
        prepaid expenses and other
      106,000,000 29,000,000 34,452,000 30,413,000 28,173,000 25,201,000 10,224,000 20,056,000 11,149,000 12,668,000 10,537,000 8,815,000 9,535,000 10,231,000 9,133,000 13,792,000 8,223,000 9,175,000 9,708,000 8,595,000 9,792,000 10,001,000 10,221,000 16,704,000 17,842,000 12,708,000 21,751,000 8,723,000 8,454,000 8,632,000 15,826,000 14,293,000 9,997,000 10,752,000 17,756,000 18,121,000 8,053,000 8,799,000 15,326,000 14,901,000 12,850,000 17,137,000 19,114,000 16,621,000 18,147,000 19,625,000 16,782,000 15,007,000 14,446,000 9,944,000 10,498,000 30,340,000 28,523,000 30,017,000 39,014,000 46,812,000 44,141,000 68,026,000 30,937,000 32,281,000 18,565,000 45,522,000 12,847,000 14,284,000 9,772,000 14,259,000 16,802,000 14,111,000 22,930,000 22,161,000 18,598,000 18,212,000 12,022,000 14,129,000 18,587,000 21,587,000 18,000,000 17,485,000 22,331,000 15,961,000 6,866,000 7,283,000 8,403,000 8,244,000 1,958,000 
        total current assets
      1,671,000,000 811,000,000 632,958,000 575,090,000 471,822,000 434,699,000 2,044,428,000 774,228,000 793,045,000 916,439,000 702,552,000 678,985,000 756,276,000 737,203,000 807,778,000 633,133,000 758,835,000 613,187,000 336,270,000 269,410,000 230,282,000 203,669,000 274,890,000 355,469,000 625,160,000 252,634,000 311,114,000 288,734,000 221,334,000 429,263,000 453,142,000 955,210,000 923,192,000 549,115,000 668,912,000 769,317,000 849,546,000 224,642,000 1,246,609,000 304,474,000 405,638,000 518,989,000 537,677,000 525,708,000 669,643,000 745,043,000 371,605,000 506,915,000 577,342,000 647,501,000 345,870,000 395,636,000 320,190,000 340,564,000 325,938,000 334,237,000 343,744,000 463,204,000 304,704,000 346,123,000 403,490,000 274,645,000 198,516,000 201,656,000 257,632,000 209,046,000 180,277,000 200,027,000 259,041,000 311,794,000 286,529,000 435,524,000 281,242,000 269,941,000 227,012,000 222,604,000 196,734,000 226,940,000 229,105,000 183,329,000 232,214,000 203,931,000 200,867,000 138,199,000 64,728,000 
        property and equipment
                                                                                           
        proved oil and gas properties
      22,280,000,000 16,012,000,000 15,653,507,000 15,378,464,000 14,688,382,000 14,301,502,000 12,501,494,000 12,164,196,000 11,756,523,000 11,477,358,000 11,169,443,000 10,824,717,000 10,483,159,000 10,258,368,000 9,914,261,000 9,694,929,000 9,518,883,000 9,397,407,000 9,271,463,000 9,107,281,000 8,735,538,000 8,608,522,000 8,307,165,000 8,134,461,000 8,043,156,000 8,934,020,000 8,143,381,000 7,974,754,000 7,578,976,000 7,278,362,000 6,686,922,000 6,372,956,000 5,824,014,000 6,139,379,000 5,938,351,000 5,631,013,000 4,803,068,000 5,700,418,000 5,406,656,000 7,249,808,000 6,994,150,000 7,606,405,000 7,468,331,000 7,356,877,000 7,006,832,000 7,348,436,000 6,789,927,000 6,151,765,000 5,875,541,000 5,637,462,000 5,414,842,000 5,922,411,000 5,670,183,000 5,401,684,000 5,197,761,000 4,869,603,000 4,657,347,000 4,378,987,000 4,070,916,000 3,799,844,000 3,553,287,000 3,389,158,000 3,137,262,000 3,066,300,000 2,889,235,000 2,797,341,000 2,804,559,000 2,916,495,000 2,941,940,000 3,007,946,000 3,134,922,000 3,012,306,000 2,851,809,000 2,721,229,000 2,405,243,000 2,320,523,000 2,174,265,000 2,063,911,000 1,733,187,000 1,631,994,000 1,522,508,000 1,441,959,000 1,374,732,000 1,275,536,000 414,458,000 
        accumulated depletion, depreciation, and amortization
      -7,891,000,000 -8,793,000,000 -8,477,647,000 -8,157,601,000 -7,869,420,000 -7,603,195,000 -7,370,881,000 -7,171,277,000 -6,994,005,000 -6,830,253,000 -6,680,485,000 -6,494,068,000 -6,339,303,000 -6,188,147,000 -6,054,796,000 -5,944,409,000 -5,792,648,000 -5,634,961,000 -5,439,387,000 -5,244,367,000 -5,051,876,000 -4,886,973,000 -4,713,442,000 -4,536,537,000 -4,389,103,000 -4,177,876,000 -3,953,181,000 -3,774,548,000 -3,586,650,000 -3,417,953,000 -3,240,124,000 -3,041,653,000 -2,893,674,000                                                     
        unproved oil and gas properties, net of valuation allowance of 12 and 12, respectively
      1,078,000,000                                                                                     
        wells in progress
      835,000,000 458,000,000 424,891,000 395,532,000 537,457,000 481,893,000 291,197,000 336,900,000 380,419,000 358,080,000 236,234,000 332,609,000 342,875,000 287,267,000 276,298,000 290,407,000 192,821,000 148,394,000 142,259,000 153,734,000 291,146,000 233,498,000 226,452,000 266,957,000 224,509,000 118,769,000 325,230,000 257,945,000 345,507,000 295,529,000 328,808,000 361,238,000 405,549,000 321,347,000 287,106,000 286,682,000 186,707,000 235,147,000 201,241,000 415,973,000 466,403,000 387,432,000 452,436,000 419,979,000 459,806,000 503,734,000 637,584,000 495,052,000 277,879,000 279,654,000 301,609,000 290,289,000 296,854,000 273,928,000 264,634,000 274,690,000 213,280,000 273,428,000 329,363,000 245,650,000 183,737,000 145,327,000 129,102,000 97,312,000 89,676,000 65,771,000 56,958,000 38,079,000 54,657,000 90,910,000 149,009,000 122,742,000 146,932,000 137,417,000 154,430,000 150,765,000 129,217,000 97,498,000 89,056,000 69,510,000 59,403,000 55,505,000 50,736,000 38,704,000  
        properties held for sale
      666,000,000                             5,280,000 5,040,000                                                       
        other property and equipment, net of accumulated depreciation of 65 and 63, respectively
      133,000,000                                                                                     
        total property and equipment
      17,101,000,000 8,202,000,000 8,264,913,000 8,260,768,000 8,161,602,000 7,992,709,000 5,754,270,000 5,661,533,000 5,513,597,000 5,376,420,000 5,292,294,000 5,231,227,000 5,029,552,000 4,882,779,000 4,746,855,000 4,651,980,000 4,582,973,000 4,575,998,000 4,665,483,000 4,714,809,000 4,712,616,000 4,701,866,000 4,765,101,000 4,825,825,000 4,888,338,000 5,953,648,000 6,029,143,000 5,985,329,000 5,954,390,000 5,831,165,000 5,776,187,000 5,718,450,000 5,669,549,000 5,554,792,000 5,417,083,000 5,346,411,000 5,450,120,000 6,081,354,000 4,364,694,000 4,601,332,000 4,603,779,000 4,950,280,000 5,451,039,000 5,485,045,000 5,643,093,000 5,503,903,000 5,215,441,000 4,434,201,000 4,004,696,000 3,859,792,000 4,181,338,000 3,989,089,000 3,781,110,000 3,677,197,000 3,601,798,000 3,426,949,000 3,278,004,000 3,096,636,000 3,042,535,000                          275,265,000 
        noncurrent assets:
                                                                                           
        other noncurrent assets
      345,000,000 234,000,000 186,952,000 152,506,000 150,708,000 145,266,000 115,490,000 111,372,000 84,618,000 78,454,000 78,430,000 70,337,000 68,957,000 71,592,000 60,832,000 45,775,000 45,070,000 44,553,000 54,111,000 55,245,000 59,180,000 47,746,000 50,785,000 51,944,000 56,618,000 65,326,000 74,255,000 87,696,000 83,692,000 33,935,000 35,539,000 31,674,000 32,119,000 32,507,000 32,896,000 14,683,000 15,847,000 19,940,000 18,101,000 25,550,000 36,907,000 31,673,000 77,615,000 71,401,000 83,109,000 78,214,000 51,190,000 56,120,000 69,334,000 70,208,000 86,278,000 82,834,000 75,653,000 78,529,000 80,062,000 84,629,000 78,412,000 83,375,000 69,150,000 51,656,000 47,053,000 16,783,000 16,805,000 12,288,000 14,435,000 16,041,000 17,523,000 19,344,000 9,649,000 10,182,000 12,049,000 12,548,000 12,434,000 12,406,000 28,360,000 13,614,000 6,928,000 7,302,000 4,031,000 4,627,000  5,223,000 5,309,000 9,722,000  
        total noncurrent assets
      372,000,000 240,000,000 191,629,000 157,377,000 154,241,000 149,239,000 229,074,000 221,250,000 91,816,000 87,126,000 83,724,000 82,414,000 84,330,000 96,057,000 96,880,000 54,011,000 53,973,000 44,792,000 60,207,000 68,779,000 72,747,000 70,896,000 82,294,000 86,334,000 101,527,000 85,950,000 112,826,000 117,876,000 110,894,000 92,434,000 44,392,000 62,825,000 67,247,000                                       49,474,000 23,630,000 27,341,000 52,587,000 27,998,000 22,711,000 33,693,000 32,674,000 22,880,000  15,250,000 15,202,000 19,334,000  
        total assets
      19,144,000,000 9,253,000,000 9,089,500,000 8,993,235,000 8,787,665,000 8,576,647,000 8,027,772,000 6,657,011,000 6,398,458,000 6,379,985,000 6,078,570,000 5,992,626,000 5,870,158,000 5,716,039,000 5,651,513,000 5,339,124,000 5,395,781,000 5,233,977,000 5,061,960,000 5,052,998,000 5,015,645,000 4,976,431,000 5,122,285,000 5,267,628,000 5,615,025,000 6,292,232,000 6,453,083,000 6,391,939,000 6,286,618,000 6,352,862,000 6,273,721,000 6,736,485,000 6,659,988,000 6,176,776,000 6,178,926,000 6,212,605,000 6,399,708,000 6,393,511,000 5,785,433,000 5,044,475,000 5,207,056,000 5,621,643,000 6,213,861,000 6,213,618,000 6,600,686,000 6,516,700,000 5,660,746,000 5,004,035,000 4,689,011,000 4,705,165,000 4,736,845,000 4,590,668,000 4,292,324,000 4,199,529,000 4,123,952,000 3,999,571,000 3,845,098,000 3,798,980,000 3,456,280,000 3,219,893,000 3,053,524,000 2,744,321,000 2,518,997,000 2,417,385,000 2,388,314,000 2,360,936,000 2,343,759,000 2,395,739,000 2,489,181,000 2,695,016,000 2,873,528,000 2,920,838,000 2,670,287,000 2,571,680,000 2,286,001,000 2,131,631,000 1,965,123,000 1,899,097,000 1,544,014,000 1,403,208,000 1,353,684,000 1,268,747,000 1,221,346,000 1,077,051,000  
        liabilities and stockholders’ equity
                                                                                           
        current liabilities:
                                                                                           
        accounts payable and accrued expenses
      2,221,000,000 690,000,000 674,157,000 794,002,000 764,773,000 760,473,000 560,839,000 563,764,000 496,361,000 611,598,000 540,459,000 530,459,000 522,279,000 532,289,000 631,984,000 583,236,000 514,558,000 563,306,000 542,474,000 496,285,000 394,226,000 371,670,000 287,777,000 257,053,000 359,406,000 402,008,000 431,440,000 407,883,000 426,550,000 403,199,000 429,698,000 446,318,000 468,108,000 386,630,000 348,885,000 311,476,000 299,676,000 299,708,000 277,571,000 257,349,000 293,796,000 302,517,000 361,734,000 423,536,000 561,051,000 640,684,000 664,925,000 592,493,000 443,395,000 606,751,000 601,131,000 577,452,000 480,318,000 525,627,000 474,573,000 460,611,000 413,211,000 456,999,000 400,420,000 413,048,000 375,721,000 417,654,000 316,179,000 270,030,000 271,986,000 236,242,000 215,363,000 207,342,000 201,282,000 254,811,000 348,549,000 302,872,000 285,481,000 254,918,000 236,044,000 226,080,000 195,288,000 171,834,000 169,657,000 160,423,000 160,909,000 164,957,000 158,031,000 119,058,000 33,864,000 
        senior notes
      1,235,000,000 419,000,000 418,593,000 2,711,148,000 2,709,584,000 2,708,243,000 2,706,700,000 1,576,896,000 1,576,115,000 1,575,334,000 1,574,553,000 1,573,772,000 1,572,991,000 1,572,210,000 1,571,429,000 1,570,648,000 1,980,392,000 2,081,164,000 2,077,630,000 2,139,625,000 2,125,651,000 2,121,319,000 2,175,038,000 2,263,119,000                   2,350,000,000 2,350,000,000 2,200,000,000 2,200,000,000 1,600,000,000 1,600,000,000 1,600,000,000 1,600,000,000                                    
        derivative liabilities
      703,000,000 2,000,000 9,888,000 19,003,000 33,423,000 7,058,000 2,401,000 20,552,000 24,108,000 6,789,000 43,152,000 22,210,000 30,723,000 56,181,000 174,717,000 425,041,000 538,127,000 319,506,000 552,044,000 545,062,000 371,802,000 200,189,000 76,969,000 38,250,000 8,277,000 50,846,000 37,798,000 70,259,000 95,269,000 62,853,000 304,159,000 259,338,000 181,068,000 172,582,000                                                    
        other current liabilities
      121,000,000 58,000,000 32,688,000 24,942,000 24,527,000 22,419,000 17,859,000 17,469,000 15,615,000 15,425,000 15,473,000 11,319,000 10,144,000 10,114,000 7,316,000 5,476,000 6,036,000 6,515,000 9,049,000 10,321,000 10,591,000 11,880,000 12,532,000 12,597,000 15,780,000 19,189,000 21,804,000 25,803,000 23,523,000            1,150,000     1,000,000   11,200,000 6,000,000 6,000,000 6,000,000 7,000,000 6,920,000 6,000,000 6,000,000 7,550,000 6,000,000                            
        total current liabilities
      4,280,000,000 1,169,000,000 1,135,326,000 837,947,000 822,723,000 789,950,000 581,099,000 601,785,000 536,084,000 633,812,000 599,084,000 563,988,000 563,146,000 598,584,000 814,017,000 1,013,753,000 1,058,721,000 889,327,000 1,103,567,000 1,051,668,000 776,619,000 583,739,000 377,278,000 307,900,000 383,463,000 472,043,000 491,042,000 503,945,000 545,342,000 466,052,000 733,857,000 1,047,957,000 649,176,000 559,212,000 436,676,000 347,772,000 353,485,000 415,172,000 328,630,000 320,841,000 303,157,000 302,525,000 485,197,000 522,157,000 696,255,000 784,660,000 669,574,000 684,581,000 515,279,000 639,131,000 629,779,000 588,200,000 510,154,000 541,546,000 499,925,000 475,761,000 471,525,000 505,805,000 423,526,000 483,148,000 489,949,000 502,053,000 371,054,000 312,903,000 332,299,000 296,671,000 249,157,000 247,863,000 244,739,000 296,601,000 466,863,000 685,424,000 441,826,000 362,545,000 279,840,000 253,462,000 221,403,000 204,070,000 202,395,000 199,698,000 189,074,000 198,994,000 224,687,000 137,460,000  
        noncurrent liabilities:
                                                                                           
        revolving credit facility
          37,500,000 68,500,000              52,500,000 135,000,000 93,000,000 178,000,000 193,000,000 72,000,000 122,500,000 129,000,000 118,000,000 46,500,000           330,500,000 293,000,000 202,000,000 184,000,000 122,000,000 416,500,000 166,000,000 390,000,000    28,000,000 28,000,000 430,000,000                                 
        asset retirement obligations
      477,000,000 150,000,000 150,127,000 150,095,000 147,929,000 145,313,000 125,327,000 124,499,000 124,085,000 118,774,000 115,271,000 113,999,000 110,163,000 108,233,000 97,724,000 100,296,000 98,908,000 97,324,000 85,514,000 85,390,000 84,206,000 83,325,000 87,014,000 86,628,000 85,267,000 84,134,000 95,806,000 95,194,000 94,026,000 91,859,000 88,149,000 87,279,000 85,407,000 103,026,000                                                    
        deferred tax liabilities
      315,000,000                                                                                     
        other noncurrent liabilities
      461,000,000 102,000,000 101,544,000 101,711,000 79,224,000 74,947,000 85,193,000 65,771,000 65,258,000 65,039,000 56,334,000 61,443,000 59,642,000 69,601,000 73,705,000 70,809,000 69,252,000 67,566,000 67,695,000 55,033,000 56,902,000 56,557,000 52,197,000 55,072,000 58,074,000 61,433,000 63,233,000 67,140,000 68,058,000 42,522,000 45,810,000 45,906,000 45,786,000 48,400,000 47,497,000 45,098,000 47,252,000 47,244,000 42,538,000 44,841,000 43,850,000 45,332,000 40,341,000 36,938,000 39,676,000 39,631,000 28,329,000 26,467,000 25,810,000 28,771,000 47,016,000 52,914,000 57,876,000 66,357,000 57,680,000 57,083,000 61,505,000 67,853,000 17,383,000 16,866,000 15,078,000 17,356,000 14,749,000 15,164,000 14,023,000 13,399,000 11,623,000 12,627,000 11,730,000 11,318,000 8,599,000 8,417,000 9,813,000 8,843,000 8,490,000 8,284,000 9,221,000 8,898,000 5,803,000 5,622,000 5,995,000 5,213,000 5,309,000 17,660,000 1,369,000 
        total noncurrent liabilities
      7,996,000,000 3,274,000,000 3,241,087,000 3,565,190,000 3,561,209,000 3,549,440,000 3,385,127,000 2,211,286,000 2,164,123,000 2,130,323,000 2,075,193,000 2,130,171,000 2,077,217,000 2,031,997,000 1,969,834,000 1,880,471,000 2,221,951,000 2,281,519,000 2,321,494,000 2,448,821,000 2,469,354,000 2,376,532,000 2,559,899,000 2,678,896,000 2,889,845,000 3,071,195,000 3,118,291,000 3,086,151,000 2,998,051,000 2,966,488,000 2,940,465,000 2,951,901,000 3,298,715,000 3,222,956,000 3,330,209,000 3,363,005,000 3,430,708,000 3,481,206,000 3,608,888,000 3,374,798,000 3,395,483,000 3,466,717,000 3,541,827,000 3,503,154,000 3,668,203,000 3,445,385,000 3,039,332,000 2,573,502,000 2,498,313,000 2,459,213,000 2,520,282,000 2,475,565,000 2,345,345,000 2,243,517,000 2,149,985,000 1,996,114,000 1,883,149,000 1,830,235,000 1,445,001,000 1,387,579,000 1,351,127,000 1,023,742,000 945,492,000 921,649,000 922,424,000 1,090,695,000 1,098,485,000 1,136,448,000 1,159,566,000 1,270,930,000 1,397,755,000 1,695,031,000 1,424,965,000 1,345,790,000 1,072,967,000 979,365,000 899,352,000 951,653,000 655,205,000 631,651,000 530,455,000 500,433,000 479,725,000 421,171,000  
        commitments and contingencies
                                                                                           
        stockholders’ equity:
                                                                                           
        common stock
      2,000,000 1,000,000 1,146,000 1,146,000 1,145,000 1,145,000 1,144,000 1,141,000 1,150,000 1,157,000 1,163,000 1,181,000 1,205,000 1,219,000 1,228,000 1,220,000 1,219,000 1,219,000 1,215,000 1,210,000 1,147,000 1,147,000 1,146,000 1,136,000 1,130,000 1,130,000 1,129,000 1,125,000 1,122,000 1,122,000 1,121,000 1,118,000 1,117,000 1,117,000 1,116,000 1,115,000 1,113,000 1,113,000 869,000 683,000 681,000 681,000 680,000 676,000 675,000 675,000 674,000 671,000 671,000 671,000 670,000 664,000 663,000 662,000 661,000 652,000 642,000 641,000 641,000 638,000 637,000 634,000 631,000 631,000 630,000           636,000 630,000 553,000 551,000 583,000 572,000     
        additional paid-in capital
      3,962,000,000 1,517,000,000 1,507,875,000 1,516,542,000 1,508,865,000 1,501,779,000 1,492,778,000 1,492,859,000 1,536,929,000 1,565,021,000 1,581,110,000 1,680,080,000 1,743,567,000 1,779,703,000 1,810,352,000 1,850,601,000 1,844,478,000 1,840,228,000 1,838,620,000 1,838,859,000 1,833,651,000 1,827,914,000 1,827,836,000 1,825,327,000 1,797,154,000 1,791,596,000 1,784,787,000 1,779,665,000 1,771,558,000 1,765,738,000 1,758,205,000 1,754,169,000 1,747,035,000 1,741,623,000 1,734,217,000 1,729,104,000 1,723,010,000 1,716,556,000 866,239,000 321,841,000 312,473,000 305,607,000 298,438,000 299,637,000 289,294,000 283,295,000 273,783,000 273,664,000 264,064,000 257,720,000 247,165,000 254,940,000 242,526,000 233,642,000 222,812,000 234,562,000 222,353,000 216,966,000 223,120,000 215,704,000 206,304,000 191,674,000 183,203,000 174,973,000 165,715,000 160,516,000 151,620,000 145,972,000 141,872,000 99,440,000 91,503,000 86,930,000 64,923,000 170,070,000 163,080,000 156,022,000 150,455,000 38,940,000 34,367,000 152,649,000 125,329,000 123,278,000 146,185,000 141,038,000 135,155,000 
        retained earnings
      2,903,000,000 3,291,000,000 3,205,190,000 3,073,545,000 2,894,870,000 2,735,494,000 2,570,108,000 2,352,532,000 2,162,771,000 2,052,279,000 1,826,002,000 1,621,202,000 1,489,032,000 1,308,558,000 1,068,385,000 605,564,000 282,079,000 234,533,000 -190,367,000 -274,745,000 -51,719,000 200,697,000 365,872,000 465,310,000 554,562,000 967,587,000 1,069,642,000 1,033,051,000 982,662,000 1,165,842,000 856,111,000 997,641,000 980,444,000 665,657,000 691,915,000 786,608,000 906,515,000 794,020,000 994,969,000 1,040,219,000 1,208,900,000 1,559,515,000 1,899,803,000 1,900,058,000 1,957,747,000 2,013,997,000 1,682,273,000 1,476,703,000 1,416,923,000 1,354,669,000 1,347,674,000 1,280,332,000 1,203,813,000 1,190,397,000 1,257,534,000 1,299,175,000 1,274,287,000 1,251,157,000 1,371,869,000 1,144,972,000 1,020,448,000 1,042,123,000 1,004,984,000 992,685,000 974,620,000 851,583,000 850,593,000 858,135,000 866,457,000 964,019,000 1,090,059,000 1,005,122,000 971,570,000 878,652,000 845,786,000 791,269,000 732,035,000 695,224,000 651,693,000 598,559,000 558,490,000 510,812,000 459,576,000 435,068,000 140,468,000 
        accumulated other comprehensive income
      1,000,000 1,000,000                                                             14,089,000 15,033,000  -37,954,000 -5,492,000 7,951,000 77,694,000 65,293,000    -156,968,000 -47,183,000   12,929,000 4,587,000   -54,599,000 -49,480,000 -17,419,000  
        total stockholders’ equity
      6,868,000,000 4,810,000,000 4,713,087,000 4,590,098,000 4,403,733,000 4,237,257,000 4,061,546,000 3,843,940,000 3,698,251,000 3,615,850,000 3,404,293,000 3,298,467,000 3,229,795,000 3,085,458,000 2,867,662,000 2,444,900,000 2,115,109,000 2,063,131,000 1,636,899,000 1,552,509,000 1,769,672,000 2,016,160,000 2,185,108,000 2,280,832,000 2,341,717,000 2,748,994,000 2,843,750,000 2,801,843,000 2,743,225,000 2,920,322,000 2,599,399,000 2,736,627,000 2,712,097,000 2,394,608,000 2,412,041,000 2,501,828,000 2,615,515,000 2,497,133,000 1,847,915,000 1,348,836,000 1,508,416,000 1,852,401,000 2,186,837,000 2,188,307,000 2,236,228,000  1,951,840,000 1,745,952,000 1,675,419,000  1,586,784,000 1,526,903,000 1,436,825,000       1,349,166,000 1,212,448,000 1,218,526,000 1,202,451,000 1,182,833,000 1,133,591,000           898,804,000 844,368,000 743,374,000 686,414,000 571,859,000 634,155,000  516,934,000 518,420,000  
        total liabilities and stockholders’ equity
      19,144,000,000 9,253,000,000 9,089,500,000 8,993,235,000 8,787,665,000 8,576,647,000 8,027,772,000 6,657,011,000 6,398,458,000 6,379,985,000 6,078,570,000 5,992,626,000 5,870,158,000 5,716,039,000 5,651,513,000 5,339,124,000 5,395,781,000 5,233,977,000 5,061,960,000 5,052,998,000 5,015,645,000 4,976,431,000 5,122,285,000 5,267,628,000 5,615,025,000 6,292,232,000 6,453,083,000 6,391,939,000 6,286,618,000 6,352,862,000 6,273,721,000 6,736,485,000 6,659,988,000 6,176,776,000 6,178,926,000 6,212,605,000 6,399,708,000 6,393,511,000 5,785,433,000 5,044,475,000 5,207,056,000 5,621,643,000 6,213,861,000 6,213,618,000 6,600,686,000  5,660,746,000 5,004,035,000 4,689,011,000  4,736,845,000 4,590,668,000 4,292,324,000  4,123,952,000 3,999,571,000 3,845,098,000   3,219,893,000 3,053,524,000 2,744,321,000 2,518,997,000 2,417,385,000 2,388,314,000           2,131,631,000 1,965,123,000 1,899,097,000 1,544,014,000 1,403,208,000 1,353,684,000  1,221,346,000 1,077,051,000  
        unproved oil and gas properties, net of valuation allowance of 12 and 33, respectively
       460,000,000                                                                                    
        other property and equipment, net of accumulated depreciation of 63 and 62, respectively
       65,000,000                                                                                    
        net deferred tax liabilities
       724,000,000 690,446,000 589,756,000 569,551,000 545,295,000 467,459,000 440,815,000 397,296,000 369,903,000                                                                            
        unproved oil and gas properties, net of valuation allowance of 12,334 and 32,680, respectively
        592,493,000                                                                                   
        other property and equipment, net of accumulated depreciation of 64,658 and 61,737, respectively
        71,669,000                                                                                   
        accumulated other comprehensive loss
        -1,124,000 -1,135,000 -1,147,000 -1,161,000 -2,484,000 -2,592,000 -2,599,000 -2,607,000 -3,982,000 -3,996,000 -4,009,000 -4,022,000 -12,303,000 -12,485,000 -12,667,000 -12,849,000 -12,569,000 -12,815,000 -13,407,000 -13,598,000 -9,746,000 -10,941,000 -11,129,000 -11,319,000 -11,808,000 -11,998,000 -12,117,000 -12,380,000 -16,038,000 -16,301,000 -16,499,000 -13,789,000 -15,207,000 -14,999,000 -15,123,000 -14,556,000 -14,162,000 -13,907,000 -13,638,000 -13,402,000 -12,084,000 -12,064,000 -11,488,000 -11,312,000 -4,890,000 -5,086,000 -5,416,000 -5,416,000 -7,902,000 -8,210,000 -8,956,000 -9,014,000 -5,744,000 -5,430,000 -5,314,000 -4,280,000 -6,333,000            -171,265,000 -550,162,000 -230,808,000             
        unproved oil and gas properties, net of valuation allowance of 26,680 and 32,680, respectively
         589,842,000                                                                                  
        other property and equipment, net of accumulated depreciation of 63,685 and 61,737, respectively
         54,531,000                                                                                  
        unproved oil and gas properties, net of valuation allowance of 32,680 and 32,680, respectively
          760,128,000                                                                                 
        other property and equipment, net of accumulated depreciation of 62,709 and 61,737, respectively
          45,055,000                                                                                 
        unproved oil and gas properties, net of valuation allowance of 32,680 and 35,362, respectively
           764,924,000                                                                                
        other property and equipment, net of accumulated depreciation of 61,737 and 59,669, respectively
           47,585,000                                                                                
        unproved oil and gas properties, net of valuation allowance of 33,095 and 35,362, respectively
            287,311,000                                                                               
        other property and equipment, net of accumulated depreciation of 62,435 and 59,669, respectively
            45,149,000                                                                               
        acquisition deposit held in escrow
            102,000,000 102,000,000                                                                              
        unproved oil and gas properties, net of valuation allowance of 34,123 and 35,362, respectively
             286,312,000                                                                              
        other property and equipment, net of accumulated depreciation of 61,547 and 59,669, respectively
             45,402,000                                                                              
        unproved oil and gas properties, net of valuation allowance of 34,934 and 35,362, respectively
              335,755,000                                                                             
        other property and equipment, net of accumulated depreciation of 60,606 and 59,669, respectively
              34,905,000                                                                             
        unproved oil and gas properties, net of valuation allowance of 35,362 and 38,008, respectively
               335,620,000                                                                            
        other property and equipment, net of accumulated depreciation of 59,669 and 56,512, respectively
               35,615,000                                                                            
        unproved oil and gas properties, net of valuation allowance of 36,286 and 38,008, respectively
                526,085,000                                                                           
        other property and equipment, net of accumulated depreciation of 59,133 and 56,512, respectively
                41,017,000                                                                           
        deferred income taxes
                324,440,000 375,063,000 330,782,000 280,811,000 212,470,000 102,371,000 21,768,000 9,769,000     34,582,000 57,049,000 93,918,000 189,386,000 217,469,000 190,146,000 176,348,000 223,278,000 140,949,000 177,709,000 178,423,000 79,989,000 208,720,000 245,506,000 304,331,000 315,672,000 453,712,000 472,355,000 563,105,000 758,279,000 833,352,000 859,588,000 865,726,000  9,084,000 12,086,000 11,227,000 10,749,000 10,912,000 13,136,000 9,215,000 8,579,000 5,746,000 5,798,000 4,950,000 4,222,000 5,203,000 7,086,000 8,503,000 8,883,000    4,934,000 8,424,000 16,938,000 42,210,000 41,289,000 26,187,000 143,148,000 58,956,000 33,211,000 4,186,000 2,713,000 2,980,000     8,252,000 24,424,000 6,017,000 7,974,000 
        unproved oil and gas properties, net of valuation allowance of 37,904 and 38,008, respectively
                 524,693,000 497,127,000                                                                         
        other property and equipment, net of accumulated depreciation of 58,203 and 56,512, respectively
                 43,276,000                                                                          
        other property and equipment, net of accumulated depreciation of 57,338 and 56,512, respectively
                  45,694,000                                                                         
        unproved oil and gas properties, net of valuation allowance of 38,008 and 34,934, respectively
                   487,192,000                                                                        
        other property and equipment, net of accumulated depreciation of 56,512 and 62,359, respectively
                   38,099,000                                                                        
        unproved oil and gas properties
                    579,261,000 577,854,000 628,250,000 629,098,000 654,513,000 656,848,000 705,822,000 714,602,000 907,864,000 923,666,000 972,844,000 1,005,887,000 1,434,435,000 1,445,985,000 1,529,825,000 1,581,401,000 1,892,557,000 1,917,883,000 1,986,070,000 2,047,203,000 2,321,508,000 2,418,984,000 2,483,601,000 2,471,947,000 177,787,000 222,967,000 231,060,000 284,538,000 381,869,000 419,903,000 512,461,000 532,498,000 536,100,000 388,336,000 287,607,000 271,100,000 263,662,000 234,741,000 173,215,000 175,287,000 160,468,000 122,005,000 130,688,000 120,966,000 107,651,000 89,317,000 92,375,000 94,290,000                        
        other property and equipment, net of accumulated depreciation of 62,950 and 62,359, respectively
                    31,831,000                                                                       
        other property and equipment, net of accumulated depreciation of 62,203 and 62,359, respectively
                     33,199,000                                                                      
        other property and equipment, net of accumulated depreciation of 62,845 and 62,359, respectively
                      35,667,000                                                                     
        other property and equipment, net of accumulated depreciation of 62,359 and 63,662, respectively
                       36,060,000                                                                    
        other property and equipment, net of accumulated depreciation of 65,462 and 63,662, respectively
                        36,635,000                                                                   
        other property and equipment, net of accumulated depreciation of 75,328 and 63,662, respectively
                         41,313,000                                                                  
        other property and equipment, net of accumulated depreciation of 64,242 and 63,662, respectively
                          31,986,000                                                                 
        other property and equipment, net of accumulated depreciation of 63,662 and 64,032, respectively
                           32,217,000                                                                
        liabilities and stockholders' equity
                                                                                           
        other property and equipment, net of accumulated depreciation of 66,025 and 64,032, respectively
                            37,062,000                                                               
        other property and equipment, net of accumulated depreciation of 65,447 and 64,032, respectively
                             37,278,000                                                              
        other property and equipment, net of accumulated depreciation of 64,815 and 64,032, respectively
                              36,932,000                                                             
        senior notes, net of unamortized deferred financing costs
                              2,413,663,000 2,453,035,000 2,451,886,000 2,450,737,000 2,449,588,000 2,448,439,000 2,447,290,000  2,770,979,000 2,769,663,000 2,768,346,000 2,767,030,000 2,765,714,000 2,766,719,000 2,765,398,000 2,272,580,000 2,271,472,000 2,315,970,000                                            
        senior convertible notes, net of unamortized discount and deferred financing costs
                              159,721,000 157,263,000 154,883,000 152,503,000 150,199,000 147,894,000 145,662,000 143,430,000 141,269,000 139,107,000 137,012,000 134,918,000 132,889,000 130,856,000 128,925,000                                               
        other property and equipment, net of accumulated depreciation of 64,032 and 57,102, respectively
                               72,848,000                                                            
        other property and equipment, net of accumulated depreciation of 64,971 and 57,102, respectively
                                79,278,000                                                           
        other property and equipment, net of accumulated depreciation of 62,372 and 57,102, respectively
                                 81,193,000                                                          
        other property and equipment, net of accumulated depreciation of 59,720 and 57,102, respectively
                                  86,732,000                                                         
        other property and equipment, net of accumulated depreciation of 57,102 and 49,985, respectively
                                   88,546,000                                                        
        asset retirement obligations associated with oil and gas properties held for sale
                                      23,139,000 11,369,000                                                    
        other property and equipment, net of accumulated depreciation of 56,067 and 49,985, respectively
                                    102,984,000                                                       
        oil and gas properties held for sale
                                     5,040,000 234,618,000 111,700,000 7,144,000 18,739,000 455,943,000 372,621,000 1,109,517,000 173,001,000                60,711,000 42,189,000 246,000 105,918,000 130,077,000 122,838,000 86,811,000                        
        other property and equipment, net of accumulated depreciation of 53,483 and 49,985, respectively
                                     102,986,000                                                      
        current portion of senior notes, net of unamortized deferred financing costs
                                     342,301,000                                                      
        noncurrent portion of senior notes, net of unamortized deferred financing costs
                                     2,429,994,000                                                      
        other property and equipment, net of accumulated depreciation of 52,483 and 49,985, respectively
                                      112,972,000                                                     
        less - accumulated depletion, depreciation, and amortization
                                       -3,171,575,000 -3,243,072,000 -3,117,983,000 -2,589,204,000 -2,836,532,000 -2,668,060,000 -3,606,829,000 -3,385,234,000 -3,481,836,000 -3,240,109,000 -3,073,603,000 -2,865,627,000 -3,233,012,000 -3,045,006,000 -2,883,506,000 -2,722,287,000 -2,583,698,000 -2,418,939,000 -2,737,774,000 -2,564,865,000 -2,376,170,000 -2,190,507,000 -2,034,929,000 -1,888,104,000 -1,766,445,000 -1,635,470,000    -1,234,802,000   -1,053,518,000 -1,063,232,000 -1,047,505,000 -1,029,858,000 -947,207,000 -927,895,000 -870,105,000 -823,410,000 -804,785,000 -753,914,000           
        other property and equipment, net of accumulated depreciation of 49,985 and 42,882, respectively
                                       106,738,000                                                    
        total other noncurrent assets
                                       72,869,000 92,931,000 96,877,000 100,042,000 87,515,000 174,130,000 138,669,000 197,639,000 152,374,000 225,145,000 202,865,000 287,950,000 267,754,000 73,700,000 62,919,000 106,973,000 197,872,000 209,637,000 205,943,000 191,024,000 181,768,000 196,216,000 238,385,000 223,350,000 239,140,000 109,041,000 62,280,000 59,378,000 35,624,000 46,249,000 62,052,000 74,290,000 24,292,000 22,137,000 30,012,000 43,945,000 46,121,000 28,435,000               
        derivative asset
                                        63,685,000 85,962,000 73,978,000 54,521,000 109,818,000 145,576,000 281,596,000 367,710,000 347,299,000 269,022,000 380,633,000 402,668,000 41,295,000 3,613,000 7,450,000 21,559,000 43,305,000 58,071,000 23,364,000 37,873,000 41,865,000 69,207,000 67,457,000 55,813,000 54,698,000 28,985,000 33,571,000 43,491,000 56,199,000 45,481,000 58,364,000 30,295,000                    
        other property and equipment, net of accumulated depreciation of 50,468 and 42,882, respectively
                                        106,046,000                                                   
        derivative liability
                                        87,791,000 36,296,000 53,809,000 115,464,000 51,059,000 63,492,000 8,211,000 8,000 2,900,000 8,107,000 398,000  4,649,000 92,088,000 60,684,000 26,380,000 22,648,000 4,748,000 22,836,000 8,999,000 19,352,000 9,150,000 50,764,000 42,806,000 21,106,000 70,100,000 114,228,000 82,044,000 53,732,000 37,903,000 57,682,000 53,929,000                    
        asset retirement obligation
                                        100,958,000 100,304,000 83,160,000 96,134,000 66,158,000 108,331,000 105,329,000 137,525,000 118,153,000 115,276,000 108,815,000 120,867,000 123,905,000 117,916,000 115,889,000 115,659,000 101,650,000 118,383,000 115,163,000 112,912,000 90,788,000 89,027,000 87,647,000 87,167,000 73,693,000 72,273,000 70,979,000 69,052,000 64,286,000 64,284,000 61,002,000 60,289,000 68,682,000 85,882,000 109,653,000 108,755,000 101,346,000 103,741,000 100,171,000 96,432,000 77,258,000 81,205,000 77,170,000 77,242,000 71,208,000 69,011,000 67,196,000 66,078,000 53,547,000 43,383,000  
        asset retirement obligation associated with oil and gas properties held for sale
                                         234,000 16,056,000 26,241,000 46,290,000 32,055,000 33,862,000    14,286,000  452,000 2,760,000 4,526,000 3,033,000 25,339,000 4,617,000 4,396,000 1,393,000 749,000 1,732,000 1,770,000 1,277,000 220,000 92,000 122,000 2,119,000 3,076,000 1,526,000 4,245,000 18,126,000 23,711,000 9,336,000  238,000 4,087,000 36,000 1,104,000 8,744,000 7,827,000           
        other property and equipment, net of accumulated depreciation of 47,738 and 42,882, respectively
                                         108,976,000                                                  
        other property and equipment, net of accumulated depreciation of 44,662 and 42,882, respectively
                                          110,005,000                                                 
        the accompanying notes are an integral part of these condensed consolidated financial statements.
                                                                                           
        other property and equipment, net of accumulated depreciation of 42,882 and 32,956, respectively
                                           137,753,000                                                
        other property and equipment, net of accumulated depreciation of 41,958 and 32,956, respectively
                                            137,553,000                                               
        restricted cash
                                            49,000,000         5,499,000 23,753,000 96,713,000 94,700,000 94,311,000 106,800,000 86,773,000 93,771,000 109,486,000 114,343,000 124,703,000                            
        net profits plan liability
                                            1,162,000 9,476,000 6,351,000 7,611,000 13,962,000 18,326,000 22,802,000 27,136,000 41,705,000 48,104,000 55,209,000 56,985,000 72,404,000 71,464,000 76,902,000 78,827,000 90,389,000 89,591,000 111,670,000 107,731,000 108,489,000 133,419,000 147,403,000 135,850,000 140,506,000 136,420,000 143,019,000 170,291,000 163,328,000 156,524,000 154,075,000 177,366,000 258,307,000 293,174,000 225,032,000 211,406,000 167,531,000 164,388,000 165,548,000 160,583,000 154,195,000 157,904,000 143,845,000 136,824,000  46,957,000  
        other property and equipment, net of accumulated depreciation of 38,175 and 32,956, respectively
                                             146,412,000                                              
        oil and gas properties held for sale, net of accumulated depletion, depreciation, and amortization of 288,592 and 0, respectively
                                              152,725,000                                             
        other property and equipment, net of accumulated depreciation of 34,699 and 32,956, respectively
                                              144,675,000                                             
        oil and gas properties held for sale, net of accumulated depletion, depreciation and amortization of 0 and 22,482, respectively
                                               641,000                                            
        other property and equipment, net of accumulated depreciation of 32,956 and 37,079, respectively
                                               153,100,000                                            
        deferred tax liability
                                                120,563,000 90,514,000 135,204,000 142,976,000                                        
        oil and gas properties held for sale, net of accumulated depletion, depreciation and amortization of 74,894 and 22,482, respectively
                                                29,173,000                                           
        other property and equipment, net of accumulated depreciation of 43,197 and 37,079, respectively
                                                359,339,000                                           
        oil and gas properties held for sale net of accumulated depletion, depreciation and amortization of 30,514 and 22,482, respectively
                                                 7,361,000                                          
        other property and equipment, net of accumulated depreciation of 38,051 and 37,079, respectively
                                                 354,528,000                                          
        oil, gas, and other property and equipment held for sale net of accumulated depletion, depreciation and amortization of 580,637 and 22,482, respectively
                                                  184,951,000                                         
        other property and equipment, net of accumulated depreciation of 35,590 and 37,079, respectively
                                                  344,670,000                                         
        oil and gas properties held for sale, net of accumulated depletion, depreciation and amortization of 22,482 and 7,390, respectively
                                                   17,891,000                                        
        other property and equipment, net of accumulated depreciation of 37,079 and 28,775, respectively
                                                   334,356,000                                        
        stockholders' equity:
                                                                                           
        treasury stock
                                                      -823,000 -823,000 -823,000 -823,000 -1,221,000 -1,221,000 -1,221,000 -1,263,000 -1,544,000 -1,544,000 -1,544,000    -456,000   -1,204,000 -1,230,000 -1,256,000 -1,773,000 -1,892,000 -2,011,000 -2,130,000 -2,804,000 -29,049,000 -29,126,000   -4,272,000    -5,148,000 -33,336,000 -33,336,000  
        total stockholders' equity
                                                   2,286,655,000    1,606,821,000    1,414,466,000 1,474,042,000 1,527,696,000 1,490,424,000 1,462,940,000 1,587,753,000       973,570,000 996,117,000 1,011,428,000 1,084,876,000 1,127,485,000 1,008,910,000 540,383,000 803,496,000 863,345,000 933,194,000       569,320,000   256,295,000 
        total liabilities and stockholders' equity
                                                   6,516,700,000    4,705,165,000    4,199,529,000    3,798,980,000 3,456,280,000       2,360,936,000 2,343,759,000 2,395,739,000 2,489,181,000 2,695,016,000 2,873,528,000 2,920,838,000 2,670,287,000 2,571,680,000 2,286,001,000       1,268,747,000   345,633,000 
        oil and gas properties held for sale net of accumulated depletion, depreciation and amortization of 22,482 and 7,390, respectively
                                                    19,883,000                                       
        other property and equipment, net of accumulated depreciation of 35,627 and 28,775, respectively
                                                    276,953,000                                       
        oil and gas properties held for sale net of accumulated depletion, depreciation and amortization of 23,697 and 7,390, respectively
                                                     23,935,000                                      
        other property and equipment, net of accumulated depreciation of 33,529 and 28,775, respectively
                                                     258,619,000                                      
        oil and gas properties held for sale net of accumulated depletion, depreciation and amortization of 31,766 in 2014 and 7,390 in 2013
                                                      42,276,000                                     
        other property and equipment, net of accumulated depreciation of 31,013 in 2014 and 28,775 in 2013
                                                      243,680,000                                     
        refundable income taxes
                                                       4,630,000 2,854,000 2,716,000 3,113,000 3,364,000 3,242,000 2,603,000 2,575,000 5,581,000  3,134,000 4,752,000 8,482,000 1,371,000 23,215,000 19,770,000 32,773,000 2,821,000   13,161,000 4,583,000 9,854,000  933,000 3,097,000 6,908,000 4,850,000 7,684,000 21,495,000 18,332,000      
        land
                                                       1,857,000 1,857,000 1,857,000 1,857,000 1,845,000 1,845,000 1,845,000 1,550,000 1,548,000 1,543,000 1,526,000 1,526,000 1,491,000 1,483,000 1,483,000 1,371,000 1,371,000 1,371,000 1,371,000 1,350,000 1,350,000                
        materials inventory, at lower of cost or market
                                                       15,950,000 14,115,000 14,012,000 14,110,000 13,444,000 12,718,000 12,966,000 14,150,000 16,537,000 14,959,000 15,915,000 18,215,000 22,542,000 27,810,000 31,305,000 25,094,000 24,467,000 30,411,000 37,565,000 36,759,000                 
        oil and gas properties held for sale, net of accumulated depletion, depreciation and amortization of 7,390 in 2013 and 20,676 in 2012
                                                       19,072,000                                    
        other property and equipment, net of accumulated depreciation of 28,775 in 2013 and 22,442 in 2012
                                                       218,395,000                                    
        oil and gas properties held for sale net of accumulated depletion, depreciation and amortization of 539,769 in 2013 and 20,676 in 2012
                                                        400,393,000                                   
        other property and equipment, net of accumulated depreciation of 27,571 in 2013 and 22,442 in 2012
                                                        203,799,000                                   
        6.625% senior notes due 2019
                                                        350,000,000 350,000,000 350,000,000 350,000,000 350,000,000 350,000,000                              
        6.50% senior notes due 2021
                                                        350,000,000 350,000,000 350,000,000 350,000,000 350,000,000 350,000,000                              
        6.50% senior notes due 2023
                                                        400,000,000 400,000,000 400,000,000 400,000,000 400,000,000 400,000,000                              
        5.0% senior notes due 2024
                                                        500,000,000 500,000,000                                  
        property and equipment (successful efforts method), at cost:
                                                                                           
        oil and gas properties held for sale net of accumulated depletion, depreciation and amortization of 55,348 in 2013 and 20,676 in 2012
                                                         87,310,000                                  
        other property and equipment, net of accumulated depreciation of 25,542 in 2013 and 22,442 in 2012
                                                         176,243,000                                  
        oil and gas properties held for sale net of accumulated depletion, depreciation and amortization of 21,305 in 2013 and 20,676 in 2012
                                                          33,340,000                                 
        other property and equipment, net of accumulated depreciation of 23,968 in 2013 and 22,442 in 2012
                                                          156,416,000                                 
        oil and gas properties held for sale net of accumulated depletion, depreciation and amortization of 20,676 in 2012 and 10,714 in 2011
                                                           33,620,000                                
        other property and equipment, net of accumulated depreciation of 22,442 in 2012 and 23,985 in 2011
                                                           153,559,000                                
        other noncurrent assets:
                                                                                           
        long-term credit facility
                                                           340,000,000 228,000,000 61,000,000 24,000,000     48,000,000 2,000,000   188,000,000 235,000,000 275,000,000 299,000,000 300,000,000 170,000,000 295,000,000 276,500,000 285,000,000 155,000,000 96,000,000 350,000,000 334,000,000 66,000,000 51,000,000   52,000,000 51,000,000  
        3.50% senior convertible notes, net of unamortized discount of 2,431 in 2011
                                                                                           
        oil and gas properties held for sale net of accumulated depletion, depreciation and amortization of 15,446 in 2012 and 10,714 in 2011
                                                            19,503,000                               
        other property and equipment, net of accumulated depreciation of 22,075 in 2012 and 23,985 in 2011
                                                            135,376,000                               
        other property and equipment, net of accumulated depreciation of 20,799 in 2012 and 23,985 in 2011
                                                             120,058,000                              
        other property and equipment, net of accumulated depreciation of 25,048 in 2012 and 23,985 in 2011
                                                              106,904,000                             
        3.50% senior convertible notes, net of unamortized discount of 0 in 2012 and 2,431 in 2011
                                                              287,500,000                             
        6.625% senior notes
                                                              350,000,000 350,000,000 350,000,000 350,000,000 350,000,000                         
        6.50% senior notes
                                                              350,000,000 350,000,000                            
        other property and equipment, net of accumulated depreciation of 23,985 in 2011 and 15,480 in 2010
                                                               71,369,000                            
        3.50% senior convertible notes, net of unamortized discount of 2,431 in 2011 and 11,827 in 2010
                                                               285,069,000                            
        other property and equipment, net of accumulated depreciation of 18,312 in 2011 and 15,480 in 2010
                                                                47,655,000                           
        deposit associated with oil and gas properties held for sale
                                                                2,000,000   2,355,000    6,500,000        10,000,000            
        3.50% senior convertible notes, net of unamortized discount of 4,861 in 2011 and 11,827 in 2010
                                                                282,639,000                           
        other property and equipment, net of accumulated depreciation of 17,550 in 2011 and 15,480 in 2010
                                                                 61,831,000                          
        3.50% senior convertible notes, net of unamortized discount of 7,209 in 2011 and 11,827 in 2010
                                                                 280,291,000                          
        other property and equipment, net of accumulated depreciation of 16,447 in 2011 and 15,480 in 2010
                                                                  45,859,000                         
        3.50% senior convertible notes, net of unamortized discount of 9,558 in 2011 and 11,827 in 2010
                                                                  277,942,000                         
        less—accumulated depletion, depreciation, and amortization
                                                                                   -630,051,000        
        other property and equipment, net of accumulated depreciation of 15,480 in 2010 and 14,550 in 2009
                                                                   21,365,000                        
        senior convertible notes, net of unamortized discount of 11,827 in 2010, and 20,598 in 2009
                                                                   275,673,000                        
        unproved oil and gas properties, net of impairment allowance of 62,395 in 2010 and 66,570 in 2009
                                                                    79,466,000                       
        oil and gas properties held for sale less accumulated depletion, depreciation, and amortization
                                                                    114,863,000 7,115,000 15,578,000                     
        other property and equipment, net of accumulated depreciation of 17,301 in 2010 and 14,550 in 2009
                                                                    19,048,000                       
        property and equipment (successful efforts method), at cost: - sum
                                                                    2,274,232,000               1,638,464,000        
        senior convertible notes, net of unamortized discount of 14,096 in 2010, and 20,598 in 2009
                                                                    273,404,000                       
        unproved oil and gas properties, net of impairment allowance of 62,507 in 2010 and 66,570 in 2009
                                                                     138,531,000                      
        other property and equipment, net of accumulated depreciation of 16,478 in 2010 and 14,550 in 2009
                                                                     15,472,000                      
        restricted cash subject to section 1031 exchange
                                                                     19,595,000 36,160,000    10,050,000 14,398,000  25,266,000              
        senior convertible notes, net of unamortized discount of 16,288 in 2010, and 20,598 in 2009
                                                                     271,212,000                      
        unproved oil and gas properties, net of impairment allowance of 63,390 in 2010 and 66,570 in 2009
                                                                      137,192,000                     
        other property and equipment, net of accumulated depreciation of 15,430 in 2010 and 14,550 in 2009
                                                                      14,979,000                     
        senior convertible notes, net of unamortized discount of 18,480 in 2010, and 20,598 in 2009
                                                                      269,020,000                     
        short-term investments
                                                                          1,010,000 1,002,000 1,012,000 1,000,000 1,187,000 1,173,000 1,158,000 1,143,000 1,450,000 1,450,000 1,450,000 1,475,000 1,475,000 1,475,000 1,475,000 1,500,000  
        of - in 2009 and 16,788 in 2008
                                                                       116,136,000                    
        unproved oil and gas properties, net of impairment allowance
                                                                                           
        of 66,570 in 2009 and 42,945 in 2008
                                                                       132,370,000                    
        oil and gas properties held for sale less accumulated depletion,
                                                                                           
        depreciation, and amortization
                                                                       145,392,000 148,937,000 48,410,000  1,827,000 25,653,000 1,665,000 27,181,000 76,921,000 74,076,000           
        other property and equipment, net of accumulated depreciation
                                                                                           
        of 14,550 in 2009 and 13,848 in 2008
                                                                       14,404,000                    
        senior convertible notes, net of unamortized
                                                                                           
        discount of 20,598 in 2009, and 28,787 in 2008
                                                                       266,902,000                    
        issued: 62,899,122 shares in 2009 and 62,465,572 shares in 2008;
                                                                                           
        outstanding, net of treasury shares: 62,772,229 shares in 2009
                                                                                           
        and 62,288,585 shares in 2008
                                                                       629,000 626,000 626,000 626,000                 
        of 16,919 in 2009 and 16,788 in 2008
                                                                        98,709,000                   
        accrued derivative asset
                                                                        41,428,000 67,143,000 119,111,000 111,649,000 48,155,000 974,000 1,181,000 17,836,000 32,045,000 29,454,000 22,642,000 56,136,000 48,425,000 30,220,000 24,512,000 6,799,000 490,000 994,000  
        of 51,511 in 2009 and 42,945 in 2008
                                                                        147,825,000                   
        of 16,617 in 2009 and 13,848 in 2008
                                                                        14,516,000                   
        accrued derivative liability
                                                                        25,370,000 23,583,000 1,247,000 501,000 118,314,000 382,552,000 156,345,000 97,627,000 43,796,000 24,669,000 26,115,000 13,100,000 15,113,000 37,602,000 26,406,000 34,037,000 66,331,000 18,291,000  
        discount of 22,716 in 2009, and 28,787 in 2008
                                                                        264,784,000                   
        issued: 62,638,839 shares in 2009 and 62,465,572 shares in 2008;
                                                                                           
        outstanding, net of treasury shares: 62,511,946 shares in 2009
                                                                                           
        of 16,941 in 2009 and 16,788 in 2008
                                                                         108,384,000                  
        of 51,774 in 2009 and 42,945 in 2008
                                                                         156,011,000                  
        of 15,652 in 2009 and 13,848 in 2008
                                                                         15,274,000                  
        discount of 24,763 in 2009, and 28,787 in 2008
                                                                         262,737,000                  
        issued: 62,622,664 shares in 2009 and 62,465,572 shares in 2008;
                                                                                           
        outstanding, net of treasury shares: 62,495,771 shares in 2009
                                                                                           
        of 16,991 in 2009 and 16,788 in 2008
                                                                          113,779,000                 
        of 43,069 in 2009 and 42,945 in 2008
                                                                          167,905,000                 
        of 14,676 in 2009 and 13,848 in 2008
                                                                          13,442,000                 
        discount of 26,695 in 2009, and 28,787 in 2008
                                                                          260,805,000                 
        issued: 62,567,962 shares in 2009 and 62,465,572 shares in 2008;
                                                                                           
        outstanding, net of treasury shares: 62,390,975 shares in 2009
                                                                                           
        of 16,788 in 2008 and 152 in 2007
                                                                           157,690,000                
        of 42,945 in 2008 and 10,319 in 2007
                                                                           168,817,000                
        of 13,848 in 2008 and 11,549 in 2007
                                                                           13,458,000                
        goodwill
                                                                            9,452,000 9,452,000 9,452,000 9,452,000 9,452,000 9,452,000 9,452,000 9,452,000 9,452,000 9,452,000  9,452,000 9,797,000 9,612,000  
        senior convertible notes
                                                                           287,500,000 287,500,000 287,500,000 287,500,000 287,500,000 287,500,000 287,500,000          
        issued: 62,465,572 shares in 2008 and 64,010,832 shares in 2007;
                                                                                           
        outstanding, net of treasury shares: 62,288,585 shares in 2008
                                                                                           
        and 63,001,120 shares in 2007
                                                                           625,000 624,000 623,000 615,000             
        of 16,739 in 2008 and 152 in 2007
                                                                            182,598,000               
        of 9,903 in 2008 and 10,319 in 2007
                                                                            166,916,000               
        of 13,154 in 2008 and 11,549 in 2007
                                                                            9,959,000               
        issued: 62,360,826 shares in 2008 and 64,010,832 shares in 2007;
                                                                                           
        outstanding, net of treasury shares: 62,183,839 shares in 2008
                                                                                           
        of 10,094 in 2008 and 152 in 2007
                                                                             194,517,000              
        hedge margin deposit
                                                                             30,900,000              
        of 9,587 in 2008 and 10,319 in 2007
                                                                             159,057,000              
        of 12,466 in 2008 and 11,549 in 2007
                                                                             10,175,000              
        issued: 62,306,691 shares in 2008 and 64,010,832 shares in 2007;
                                                                                           
        outstanding, net of treasury shares: 62,129,704 shares in 2008
                                                                                           
        of 9,554 in 2008 and 10,319 in 2007
                                                                              153,148,000             
        of 11,940 in 2008 and 11,549 in 2007
                                                                              9,755,000             
        issued: 61,501,825 shares in 2008 and 64,010,832 shares in 2007;
                                                                                           
        outstanding, net of treasury shares: 61,301,725 shares in 2008
                                                                                           
        of 10,319 in 2007 and 9,425 in 2006
                                                                               134,386,000            
        of 11,549 in 2007 and 9,740 in 2006
                                                                               9,230,000            
        short-term note payable
                                                                                   4,469,000        
        issued: 64,010,832 shares in 2007 and 55,251,733 shares in 2006;
                                                                                           
        outstanding, net of treasury shares: 63,001,120 shares in 2007
                                                                                           
        and 55,001,733 shares in 2006
                                                                               640,000 637,000           
        of 10,210 in 2007 and 9,425 in 2006
                                                                                117,493,000           
        of 11,298 in 2007 and 9,740 in 2006
                                                                                9,074,000           
        issued: 63,733,590 shares in 2007 and 55,251,733 shares in 2006;
                                                                                           
        outstanding, net of treasury shares: 62,725,278 shares in 2007
                                                                                           
        unproved oil and gas properties, net of impairment allowance of 9,790 in 2007 and 9,425 in 2006
                                                                                 110,471,000          
        other property and equipment, net of accumulated depreciation of 10,734 in 2007 and 9,740 in 2006
                                                                                 8,487,000          
        unproved oil and gas properties, net of impairment allowance of 10,017 in 2007 and 9,425 in 2006
                                                                                  104,563,000         
        other property and equipment, net of accumulated depreciation of 10,197 in 2007 and 9,740 in 2006
                                                                                  8,034,000         
        unproved oil and gas properties, net of impairment allowance of 9,425 in 2006 and 9,862 in 2005
                                                                                   100,118,000        
        other property and equipment, net of accumulated depreciation of 9,740 in 2006 and 8,046 in 2005
                                                                                   6,988,000        
        long-term derivative asset
                                                                                   16,939,000 19,191,000 8,801,000      
        convertible notes
                                                                                   99,980,000 99,956,000 99,933,000 99,909,000 99,885,000 99,862,000 99,838,000  
        deferred stock-based compensation
                                                                                       -5,593,000 -6,593,000 -7,511,000  
        unproved oil and gas properties, net of impairment allowance of 9,798 in 2006 and 9,862 in 2005
                                                                                    49,623,000       
        other property and equipment, net of accumulated depreciation of 9,262 in 2006 and 8,046 in 2005
                                                                                    6,271,000       
        unproved oil and gas properties, net of impairment allowance of 9,690 in 2006 and 9,862 in 2005
                                                                                     52,522,000      
        other property and equipment, net of accumulated depreciation of 8,893 in 2006 and 8,046 in 2005
                                                                                     5,663,000      
        unproved oil and gas properties, net of impairment allowance of 10,227 in 2006 and 9,862 in 2005
                                                                                      47,675,000     
        other property and equipment, net of accumulated depreciation of 8,462 in 2006 and 8,046 in 2005
                                                                                      5,855,000     
        noncurrent assets
                                                                                      15,884,000     
        less - accumulated depletion, depreciation and amortization
                                                                                       -497,621,000 -468,858,000 -441,623,000  
        of 9,862 in 2005 and 9,867 in 2004
                                                                                       44,383,000    
        of 8,046 in 2005 and 6,459 in 2004
                                                                                       5,340,000    
        issued: 57,011,740 shares in 2005 and 57,458,246 shares in 2004;
                                                                                           
        outstanding, net of treasury shares: 56,761,740 shares in 2005
                                                                                           
        and 56,958,246 shares in 2004
                                                                                       570,000 582,000 580,000  
        of 9,395 in 2005 and 9,867 in 2004
                                                                                        43,221,000   
        of 7,616 in 2005 and 6,459 in 2004
                                                                                        5,446,000   
        net profits interest plan liability
                                                                                        101,814,000   
        issued: 58,177,539 shares in 2005 and 57,458,246 shares in 2004;
                                                                                           
        outstanding, net of treasury shares: 56,533,655 shares in 2005
                                                                                           
        other
                                                                                         3,748,000  
        of 9,115 in 2005 and 9,867 in 2004
                                                                                         41,562,000  
        of 7,187 in 2005 and 6,459 in 2004
                                                                                         5,339,000  
        issued: 58,019,099 shares in 2005 and 57,458,246 shares in 2004;
                                                                                           
        outstanding, net of treasury shares: 56,375,215 shares in 2005
                                                                                           
        less accumulated depletion, depreciation, amortization
                                                                                          -182,396,000 
        unproved oil and gas properties, net of impairment
                                                                                           
        other property and equipment, net of accumulated depreciation of 3,782
                                                                                           
        other assets:
                                                                                           
        khanty mansiysk oil corporation stock
                                                                                          1,651,000 
        other assets
                                                                                          3,989,000 
        total other assets
                                                                                          5,640,000 
        current liabilites:
                                                                                           
        fair value of hedging contracts
                                                                                          22,794,000 
        total curent liabilities
                                                                                          56,658,000 
        long-term liabilities:
                                                                                           
        long-term debt
                                                                                           
        total long-term liabilities
                                                                                          32,084,000 
        minority interest
                                                                                          596,000 
        unrealized hedge loss in accumulated other comprehensive loss
                                                                                          -14,685,000 
      Cashflow Statements:
      Quarterly
      Annual
        Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-06-30 2011-03-31 2010-12-31 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-06-30 2007-03-31 2006-12-31 2006-06-30 2006-03-31 2005-12-31 2005-06-30 2001-03-31 
                                                                                        
          cash flows from operating activities:
                                                                                        
          net income
        -335,000,000 108,978,000 155,088,000 201,665,000 182,269,000 188,278,000 240,523,000 210,293,000 131,199,000 247,111,000 222,343,000 149,874,000 198,552,000 258,463,000 481,240,000 323,485,000 48,764,000         -102,055,000 42,234,000 50,388,000 -177,568,000 309,732,000 -135,923,000 17,197,000 317,401,000    74,434,000     -340,258,000 3,114,000 -57,508,000 -53,058,000 331,726,000 208,938,000 59,780,000 65,607,000 6,996,000 70,690,000 76,522,000 16,727,000 -67,138,000 -38,336,000 24,889,000 26,336,000 -120,711,000 106,030,000 -18,503,000 37,139,000 144,246,000 126,178,000 990,000 -4,415,000 -8,322,000 -87,623,000 -126,040,000 88,047,000 33,550,000 95,996,000 32,874,000 99,185,000 39,950,000 43,532,000 90,606,000 50,526,000 51,238,000 73,364,000 20,393,000 
          adjustments to reconcile net income to net cash from operating activities:
                                                                                        
          depletion, depreciation, and amortization
        432,000,000 318,738,000 325,372,000 292,990,000 269,900,000                                                                            
          stock-based compensation expense
        25,000,000 8,036,000 8,124,000 5,751,000 7,089,000 7,628,000 6,587,000 5,788,000 5,018,000 5,731,000 6,038,000 4,163,000 4,318,000 4,914,000 5,105,000 4,479,000 4,274,000 4,628,000 4,498,000 3,956,000 5,737,000 -438,000 4,164,000 5,712,000 5,561,000 5,560,000 6,766,000 6,154,000 5,838,000 6,228,000 7,004,000 5,264,000 5,412,000 6,540,000 6,347,000 4,358,000 5,455,000 6,412,000 6,570,000 7,047,000 6,868,000 6,975,000 7,277,000 7,191,000 6,024,000 8,126,000 10,227,000 7,997,000 6,344,000 6,852,000 7,427,000 9,955,000 8,113,000 8,454,000 9,359,000 8,022,000 4,350,000 7,274,000 11,837,000 5,551,000 6,890,000 11,864,000 5,603,000        3,310,000  6,279,000 2,967,000 2,443,000 6,392,000 3,197,000    
          net derivative loss
        697,000,000   -78,308,000 17,216,000 20,298,000 -86,283,000 -12,118,000 28,145,000 -80,506,000 75,355,000 -11,674,000 -51,329,000 -11,168,000 -137,577,000 104,236,000 418,521,000 -22,524,000 209,146,000 370,348,000 344,689,000   167,200,000 -545,340,000 101,002,000 -100,889,000 -79,655,000 177,081,000 -411,136,000 178,026,000 63,749,000 7,529,000 115,778,000 80,599,000                                              
          net derivative settlement gain
        -30,000,000 45,637,000 38,867,000 39,745,000 7,751,000 22,428,000 16,491,000 16,523,000 13,274,000                                                                        
          amortization of deferred financing costs and debt premiums
        -5,000,000                                                                                
          deferred income tax expense
        -85,000,000                                                                                
          other
        -28,000,000 -22,112,000 -2,682,000 -5,721,000 1,515,000 -9,406,000 -7,834,000 -18,858,000 1,102,000 9,314,000 -7,184,000 -10,000 -4,295,000 -1,426,000 -3,910,000 11,339,000 239,000 3,548,000 6,076,000 1,215,000 -14,592,000 -506,000 -2,376,000 -3,011,000 -816,000 4,511,000 -1,004,000 1,243,000 -2,530,000 2,371,000 218,000 225,000 -2,527,000 3,526,000 2,446,000 -2,300,000 4,567,000 5,891,000 -3,068,000 548,000 128,000 10,091,000 4,104,000 -1,930,000 1,496,000 4,055,000 1,841,000 -1,724,000 -3,103,000 -154,000 -2,840,000 4,737,000 1,032,000 -379,000 1,773,000 251,000 -1,118,000 -75,000    2,937,000 949,000 1,950,000 2,168,000 93,000 -829,000 -97,000 -4,262,000 -2,861,000 3,627,000 -5,329,000 17,000 16,000 -307,000 22,000 133,000 319,000 -319,000 -19,000 
          net change in working capital
        -31,000,000  -52,568,000 69,265,000 -31,564,000  32,040,000 50,215,000 -97,688,000  -52,893,000 21,780,000 -26,216,000  96,518,000 28,214,000 -137,962,000  21,078,000 82,529,000 -51,437,000  16,843,000 -38,737,000 -18,517,000  -9,673,000 41,613,000 -20,159,000  17,997,000                                                  
          net cash from operating activities
        640,000,000 451,912,000 504,960,000 571,143,000 482,985,000 577,869,000 452,263,000 476,382,000 276,000,000 476,515,000 382,994,000 383,251,000 331,634,000 288,375,000 513,370,000 542,569,000 342,092,000 429,630,000 328,119,000 296,399,000 105,624,000 256,860,000 201,613,000 114,339,000 218,132,000 241,981,000 203,156,000 259,928,000 118,502,000 179,452,000 229,659,000 171,383,000 140,135,000 144,793,000 128,482,000 107,149,000 134,966,000 137,792,000 158,139,000 138,597,000 118,276,000 193,503,000 235,341,000 265,586,000 283,922,000 381,453,000 359,969,000 415,425,000 299,728,000 337,645,000 404,514,000 314,063,000 282,292,000 268,383,000 243,298,000 222,235,000 188,053,000 270,785,000 369,973,000 156,685,000 78,737,000 270,150,000 153,892,000 83,054,000 111,291,000 116,586,000 125,175,000 110,120,000 252,006,000 173,636,000 142,459,000 156,810,000 282,321,000 126,075,000 150,151,000 216,352,000 129,242,000 107,233,000 185,576,000  
          cash flows from investing activities:
                                                                                        
          capital expenditures
        -555,000,000 -216,264,000 -397,693,000 -410,175,000 -413,868,000 -353,474,000 -302,107,000 -322,684,000 -332,365,000 -222,655,000 -216,710,000 -309,334,000 -240,712,000 -288,088,000 -226,101,000 -215,618,000 -150,127,000 -124,576,000 -180,088,000 -222,614,000 -147,563,000 -128,008,000 -109,568,000 -170,903,000 -139,306,000 -235,127,000 -212,515,000 -326,787,000 -249,340,000 -270,600,000 -309,269,000 -421,798,000 -301,521,000 -263,384,000 -258,226,000 -212,342,000 -154,401,000 -137,117,000 -147,224,000 -169,200,000 -176,370,000 -231,737,000 -287,741,000 -429,165,000 -544,965,000 -656,936,000 -539,282,000 -426,841,000 -351,739,000 -432,181,000 -387,363,000 -352,807,000 -381,185,000 -381,073,000 -421,389,000 -370,351,000 -335,015,000 -551,476,000 -86,787,000 -76,640,000 -82,201,000 -133,625,000 -251,125,000 -165,245,000 -167,941,000 -161,306,000 -137,637,000 -66,046,000 -134,800,000  
          free cash flows
        85,000,000 235,648,000 107,267,000 160,968,000 69,117,000 224,395,000 150,156,000 153,698,000 -56,365,000 253,860,000 166,284,000 73,917,000 90,922,000 287,000 287,269,000 326,951,000 191,965,000 305,054,000 148,031,000 73,785,000 -41,939,000 128,852,000 92,045,000 -56,564,000 78,826,000 6,854,000 -9,359,000 -66,859,000 -130,838,000 -91,148,000 -79,610,000 -250,415,000 -161,386,000 -118,591,000 -129,744,000 -105,193,000 -19,435,000 675,000 10,915,000 -30,603,000 -58,094,000 -38,234,000 -52,400,000 -163,579,000 -261,043,000 -275,483,000 -179,313,000 -11,416,000 -52,011,000 -94,536,000 17,151,000 -38,744,000 -98,893,000 -112,690,000 -178,091,000 -148,116,000 -146,962,000 -280,691,000 369,973,000 156,685,000 78,737,000 270,150,000 153,892,000 -3,733,000 34,651,000 34,385,000 -8,450,000 -141,005,000 86,761,000 5,695,000 -18,847,000 19,173,000 282,321,000 126,075,000 150,151,000 216,352,000 129,242,000 41,187,000 50,776,000  
          acquisition of business, net of cash acquired
        -49,000,000                                                                                
          net cash from investing activities
        -628,000,000 -224,226,000 -404,812,000 -410,202,000 -428,760,000 -2,449,259,000 -302,945,000 -322,679,000 -332,288,000 -223,268,000 -237,194,000 -397,818,000 -240,405,000 -287,821,000 -226,697,000 -215,618,000 -150,127,000 -122,484,000 -174,795,000 -222,322,000 -147,634,000 -128,806,000 -116,643,000 -170,811,000 -139,306,000 -234,588,000 -215,415,000 -320,353,000 -242,935,000 -273,974,000 -308,241,000 -194,978,000 189,259,000 -270,537,000 -245,357,000 -202,949,000 517,313,000 -1,508,821,000 -10,564,000 -161,931,000 -189,323,000 -209,793,000 -288,120,000 -112,268,000 -534,458,000 -742,764,000 -903,350,000 -487,102,000 -345,533,000 -26,530,000 -388,583,000 -398,887,000 -378,903,000 -373,637,000 -388,539,000 -363,371,000 -331,786,000 -508,006,000     64,142,000 -43,441,000 -61,262,000 -71,122,000 -128,267,000 -240,240,000 -159,888,000 -178,713,000 -93,944,000 -263,515,000      -66,507,000 -169,978,000 -30,035,000 
          cash flows from financing activities:
                                                                                        
          proceeds from revolving credit facility
        15,000,000 500,000 185,000,000 528,000,000 856,500,000             183,000,000 705,500,000 504,000,000 440,000,000 281,500,000 324,500,000 415,500,000 425,500,000                                                        
          repayment of revolving credit facility
        -15,000,000 -185,000,000 -565,500,000 -887,500,000             -183,000,000 -758,000,000 -586,500,000 -398,000,000 -366,500,000 -339,500,000 -294,500,000 -476,000,000                                                        
          net proceeds from senior notes
        985,000,000     -233,000            -812,000                  -757,000    -606,000                                      
          cash paid to repurchase senior notes
        -808,000,000            -480,176,000 -104,770,000 -65,480,000   -95,736,000            -2,344,000 -9,987,000 -19,917,000                                        
          dividends paid
        -82,000,000 -23,224,000 -22,991,000 -22,893,000 -22,892,000 -22,884,000 -20,595,000 -20,707,000 -20,834,000 -17,447,000 -17,800,000 -18,077,000 -18,290,000 -18,419,000   -1,215,000   -1,146,000   -5,642,000   -5,607,000   -5,581,000   -4,347,000   -3,399,000   -3,370,000   -3,349,000   -3,303,000   -3,201,000      -3,127,000   -3,110,000   -3,144,000      -2,828,000 -2,863,000  
          net cash from financing activities
        69,000,000 -21,937,000 -39,774,000 -59,118,000 -54,171,000 34,077,000 1,098,126,000 -70,086,000 -53,624,000 -39,063,000 -122,058,000 -85,064,000 -58,358,000 -53,991,000 -55,327,000 -479,749,000 -104,794,000 -4,230,000 -123,524,000 -74,077,000 42,000,000 -128,054,000 -84,970,000 56,467,000 -78,821,000 -10,894,000 9,360,000 66,821,000 46,482,000 -4,319,000 -360,518,000   -4,728,000 -1,231,000 -3,826,000 -2,504,000 399,735,000 833,073,000 23,301,000 71,080,000 16,111,000 52,894,000 -153,258,000 250,438,000 361,162,000 379,856,000 -964,000 -8,000 -29,043,000 -15,931,000 84,913,000 90,772,000 110,996,000 145,241,000 141,034,000 24,825,000 326,492,000 292,805,000 302,555,000    -49,481,000 -39,901,000 -37,286,000 -828,000 130,855,000 -123,641,000 34,485,000 -84,514,000 132,975,000 44,725,000 13,223,000   4,447,000 -52,398,000 -11,448,000 -22,382,000 
          net change in cash, cash equivalents, and restricted cash
        81,000,000 205,749,000 60,374,000 101,823,000 54,000 -1,837,313,000 1,247,444,000 83,617,000 -109,912,000 214,184,000 23,742,000 -99,631,000 32,871,000 -53,437,000 231,346,000 -152,798,000 87,171,000 302,916,000 29,800,000 -10,000    5,000 -3,501,000 -2,899,000 6,396,000 -77,951,000 -98,841,000 -439,100,000 -27,431,000 329,394,000                                                
          cash, cash equivalents, and restricted cash at beginning of period
        368,000,000     616,164,000 444,998,000 332,716,000 10,000 10,000 77,965,000 313,943,000                                                
          cash, cash equivalents, and restricted cash at end of period
        449,000,000 205,749,000 60,374,000 101,823,000 54,000  1,247,444,000 83,617,000 506,252,000 214,184,000 23,742,000 -99,631,000 477,869,000 -53,437,000 231,346,000 -152,798,000 419,887,000 302,916,000    -5,000 15,000 -3,501,000 -2,899,000 6,396,000 14,000 -98,841,000 -439,100,000 -27,431,000 643,337,000                                                
          supplemental schedule of additional cash flow information:
                                                                                        
          operating activities: cash paid for interest, net of capitalized interest
        -95,000,000                                                                                
          investing activities: changes in capital expenditure accruals
        117,000,000                                                                                
          non-cash investing and financing activities
                                                                                        
          net derivative gain
         -71,429,000                                   -114,774,000                                            
          amortization of deferred financing costs
         2,346,000 2,552,000 2,552,000 2,550,000  2,182,000 1,372,000 1,371,000                               2,850,000 -920,000 1,907,000 1,911,000 1,935,000 1,957,000  1,479,000 1,477,000 1,477,000                                
          deferred income taxes
         32,851,000 75,686,000 43,204,000 26,259,000 58,464,000 45,615,000 43,516,000 27,391,000 45,085,000 -51,075,000 44,278,000 49,968,000 66,061,000 110,048,000 81,000,000 11,948,000 9,847,000 -68,000 -162,000 -52,000 -33,476,000 -22,796,000 -36,921,000 -99,347,000 -28,215,000 19,617,000 13,766,000 -47,003,000 81,036,000 -36,833,000 -861,000 98,366,000 -124,608,000 -36,668,000 -64,015,000 33,225,000 -133,873,000 -23,756,000 -95,975,000 -195,039,000 -196,334,000 4,168,000 -50,829,000 -33,727,000 199,600,000 124,269,000 35,537,000 38,374,000 6,936,000 42,380,000 45,959,000 10,280,000 -36,943,000 -22,910,000 14,927,000 15,288,000 -40,462,000 52,241,000  28,822,000 78,820,000 64,608,000 29,347,000 -5,934,000 -7,758,000 -55,390,000 -60,597,000 45,235,000 5,907,000 50,089,000 13,666,000 52,457,000 21,237,000 10,220,000 34,683,000 13,830,000 -7,194,000 21,573,000 6,504,000 
          changes in working capital:
                                                                                        
          accounts receivable
                                        -4,464,000 -7,505,000 -25,491,000 16,586,000 30,407,000 -11,783,000 12,441,000 -38,142,000 26,922,000 34,864,000 66,385,000 -30,576,000 69,527,000 17,612,000 9,034,000 -11,905,000 9,347,000 -33,285,000 14,075,000 -37,120,000 -22,164,000 -2,707,000 -19,417,000 14,702,000 -13,967,000 -21,211,000  16,385,000  7,628,000  -12,101,000 9,695,000 5,446,000 43,703,000 25,128,000 3,499,000 -1,718,000 -41,236,000 -6,349,000 12,507,000 7,762,000 -8,334,000 49,681,000 26,899,000 -25,676,000 702,000 -4,020,000 
          prepaid expenses and other
                                        755,000 7,002,000 366,000 -9,499,000 178,000 826,000 -835,000 8,588,000 -101,000 1,976,000 -2,346,000 1,652,000 1,281,000 -2,056,000 -1,068,000 417,000 885,000 4,335,000 -2,291,000 -1,034,000 354,000 4,719,000 -1,444,000 -1,756,000 -3,003,000 1,644,000 15,692,000 20,959,000   1,489,000 2,034,000 -1,569,000 -1,677,000 -5,414,000 -3,533,000 8,599,000 -6,234,000 -336,000 -8,660,000  2,319,000   416,000 1,330,000 -6,129,000 -1,577,000 
          accounts payable and accrued expenses
                                        -8,825,000 23,425,000 30,533,000 -3,476,000 -5,497,000 11,956,000 -3,439,000 -9,433,000 -52,294,000 -12,020,000 -40,207,000 11,376,000 -45,416,000 38,263,000 -15,093,000 48,178,000 -61,882,000 20,520,000 26,106,000 40,804,000 5,794,000 370,000 34,785,000 22,932,000 -26,951,000 23,485,000   6,075,000 26,299,000 31,402,000 -12,608,000 20,132,000 8,583,000 -20,921,000 -47,111,000 19,913,000 19,992,000 -5,142,000 13,217,000 2,327,000     9,374,000 3,773,000 9,836,000 
          acquisition of proved and unproved oil and gas properties
         -12,496,000 -6,585,000 -27,000 -14,892,000 -2,102,841,000 -838,000   -613,000 -20,484,000          -798,000    -2,900,000   -8,684,000 44,000   -2,507,000 751,000 -13,035,000 -75,105,000 -2,161,937,000 -4,102,000 -2,707,000 -15,044,000 -896,000 -500,000 3,481,000 -10,069,000 -85,276,000 -360,658,000   404,000 -2,806,000                              
          repurchase of common stock
         -224,000 -12,128,000   -2,065,000 -51,223,000 -32,768,000 -22,859,000 -96,383,000 -68,795,000 -40,068,000 -36,966,000                                                      -77,202,000      -555,000 -28,347,000 -1,787,000 
          net proceeds from sale of common stock
         1,073,000   1,357,000   1,243,000   1,394,000   1,324,000   517,000   1,250,000   1,306,000   885,000   405,002,000                                           
          operating activities:
                                                                                        
          cash paid for interest, net of capitalized interest
           -2,548,000 -82,311,000   -8,573,000 -32,986,000 -9,433,000 -34,834,000 -8,798,000 -33,882,000 -8,572,000 -34,793,000 -26,671,000 -64,204,000 -10,378,000 -51,364,000 -21,415,000 -53,449,000 -18,319,000 -39,861,000 -34,844,000 -47,469,000 -28,780,000 -45,476,000 -27,689,000 -39,957,000                                                    
          net cash paid for income taxes
                 -2,799,000 -39,000                                                                      
          investing activities:
                                                                                        
          changes in capital expenditure accruals
           -22,197,000 26,931,000   5,078,000 -26,569,000                                                                        
          net cash refunded for income taxes
            84,000                                                                            
          amortization of debt discount and deferred financing costs
                 1,372,000 1,371,000 1,372,000 1,371,000 1,371,000 1,303,000 3,597,000 4,010,000 3,925,000 3,905,000 4,722,000 4,723,000 4,620,000 4,506,000 4,586,000 3,992,000 3,920,000 3,921,000 3,844,000 3,789,000 3,716,000 3,792,000 3,884,000 3,866,000 3,798,000 3,799,000               1,476,000 1,474,000 1,363,000 1,077,000 1,077,000 1,076,000 951,000 3,665,000 3,601,000 11,294,000 3,620,000 3,442,000 6,657,000 3,291,000 3,291,000 3,219,000                
          loss on extinguishment of debt
                         -5,000           18,000                                                   
          debt issuance costs related to revolving credit facility
                                                                                        
          net share settlement from issuance of stock awards
             -6,815,000 -22,000                             -13,000    -176,000    -48,000    -17,000    -17,000                           
          depletion, depreciation, amortization, and asset retirement obligation liability accretion
              202,942,000 179,651,000 166,188,000 189,107,000 189,353,000 157,832,000 154,189,000 143,611,000 145,865,000 154,823,000 159,481,000 200,011,000 202,701,000 204,714,000 166,960,000 188,934,000 181,708,000 180,856,000 233,489,000 228,597,000 211,125,000 206,330,000 177,746,000 181,970,000 201,105,000 151,765,000 130,473,000 131,393,000 134,599,000 153,232,000 137,812,000 171,552,000 193,966,000 211,020,000 214,207,000 240,025,000 243,879,000 219,704,000 217,401,000 219,277,000 183,259,000 187,781,000 177,215,000 202,640,000 195,792,000 225,731,000 198,709,000 204,267,000 192,432,000 161,608,000 169,570,000 167,298,000 220,738,000 105,356,000 94,806,000 157,535,000 77,765,000          103,616,000 48,959,000       
          debt issuance costs related to credit facility
                                                                    -14,000                
          reconciliation of cash, cash equivalents, and restricted cash:
                                                                                        
          cash and cash equivalents
                                 -2,000                                                      
          restricted cash
                                  -2,897,000                                                      
          net cash refunded (paid) for income taxes
                3,292,000                                                                        
          impairment
                     1,002,000 1,077,000 4,389,000 1,000,000 8,750,000 8,750,000 8,750,000 8,750,000 8,750,000 8,750,000 8,750,000 989,763,000                                                        
          supplemental schedule of additional cash flow information and non-cash activities:
                                                                                        
          non-cash financing activities
                                                                                        
          derivative settlement gain
                  -314,000 15,636,000 5,076,000     -268,696,000 -213,555,000 -158,822,000 -107,885,000 64,991,000 70,305,000 142,528,000 73,437,000 15,379,000    -33,892,000 -40,718,000 -36,665,000 -24,528,000 -8,168,000 13,092,000 16,303,000 7,000 23,244,000 57,496,000 101,710,000 147,028,000                                        
          changes in capital expenditure accruals and other
                                 -59,167,000 44,975,000 -72,282,000 62,185,000                                                    
          increase in capital expenditure accruals and other
                   -42,653,000 66,873,000 -20,801,000 12,810,000 22,153,000 15,627,000  -20,102,000 -8,422,000 37,409,000    16,802,000                                                        
          net loss on extinguishment of debt
                                                                                        
          net cash (paid) refunded for income taxes
                                                                                        
          derivative settlement loss
                      -186,299,000 -240,598,000 -168,183,000           4,090,000 -4,969,000                                                    
          net proceeds from the sale of oil and gas properties
                         2,092,000      539,000 6,406,000 6,114,000 5,310,000 984,000 251,435,000 490,780,000 -1,646,000 12,118,000 21,914,000 744,333,000 744,233,000 188,862,000 11,761,000 1,206,000 22,835,000                                       
          debt issuance costs related to 10.0% senior secured notes due 2025
                             -183,000 -2,395,000                                                          
          decrease in capital expenditure accruals and other
                                                                                        
          net loss
                          85,593,000 -222,995,000 -251,269,000  -98,292,000 -89,252,000 -411,895,000         -26,258,000 -89,112,000    -40,907,000 -168,681,000 -347,210,000                                        
          adjustments to reconcile net loss to net cash from operating activities:
                                                                                        
          gain on extinguishment of debt
                              -25,070,000 -227,281,000 -12,195,000                                                        
          net gain on divestiture activity
                                -262,000 -61,000    -385,369,000     -33,661,000    -4,534,000 -2,415,000                                      
          repayment of 1.50% senior convertible notes due 2021
                                                                                       
          adjustments to reconcile net loss to net cash from operating activities
                                                                                        
          cash paid to repurchase 6.125% senior notes due 2022
                               -28,318,000                                                        
          supplemental non-cash investing activities:
                                                                                        
          carrying value of properties exchanged
                                 2,634,000 4,220,000 800,000 65,788,000                                                    
          supplemental non-cash financing activities:
                                                                                        
          non-cash gain on extinguishment of debt
                                                -15,722,000                                        
          net loss on divestiture activity
                                     -1,261,000 -786,000   -537,000 1,895,000 167,133,000 -37,463,000   -50,046,000 69,021,000                                        
          impairment of oil and gas properties
                                                                                        
          changes in current assets and liabilities:
                                                                                        
          proceeds from credit facility
                                 464,500,000 428,000,000 524,500,000 172,000,000     8,500,000 397,500,000 204,000,000 158,000,000 268,000,000 317,000,000 268,000,000 374,000,000 670,500,000 560,000,000 749,000,000    226,500,000 460,000,000 293,000,000 223,500,000 374,500,000 432,000,000 776,500,000 26,000,000 206,500,000 102,000,000 102,000,000 256,500,000 204,059,000 177,559,000 174,000,000 132,500,000 576,000,000 1,190,000,000 1,739,500,000 194,000,000 249,000,000 389,000,000 268,086,000 292,914,000 19,000,000 597,137,000 108,000,000  49,783,000 118,307,000  
          repayment of credit facility
                                 -471,000,000 -417,000,000 -453,000,000 -125,500,000     -8,500,000 -397,500,000 -204,000,000 -488,500,000 -230,500,000 -226,000,000 -250,000,000 -312,000,000 -965,000,000 -309,500,000 -973,000,000    -254,500,000 -460,000,000 -695,000,000 -133,500,000 -262,500,000 -265,000,000 -739,500,000 -2,000,000 -206,500,000      -221,000,000 -172,500,000 -600,000,000 -1,191,000,000 -1,609,500,000 -319,000,000 -230,500,000 -397,500,000 -138,086,000      -101,090,000 -105,000,000  
          cash paid to repurchase senior notes, including premium
                                     -18,000                                                   
          non-cash loss on extinguishment of debt
                                          22,000                                        
          abandonment and impairment of unproved properties
                                  6,337,000 12,417,000 6,338,000 23,274,000 9,055,000 11,935,000 5,625,000 12,115,000   74,450,000 3,568,000 38,000 2,311,000 54,597,000 6,600,000 5,819,000 11,627,000 57,151,000 15,522,000   37,646,000 3,818,000   5,046,000 447,000 10,707,000 142,000 3,051,000 4,316,000 3,079,000 -3,012,000 3,279,000 904,000 25,153,000 4,761,000 11,631,000 3,902,000 34,754,000 1,231,000 2,056,000 1,008,000 870,000 2,949,000 1,484,000  2,448,000 1,186,000 1,274,000 3,689,000 466,000 
          impairment of proved properties
                                           76,780,000 8,049,000 269,785,000 344,249,000 55,990,000 12,914,000 55,526,000     110,935,000 5,935,000   170,400,000   170,512,000      21,630,000 91,000 6,043,000 147,049,000 292,100,000 564,000       1,289,000 1,289,000   171,000 
          accrued derivative settlements
                                        -3,579,000 6,538,000 6,563,000 -3,355,000 2,838,000 14,889,000 5,534,000 9,799,000 4,318,000                                        
          net proceeds from senior convertible notes
                                             -64,000                                           
          cash paid for capped call transactions
                                             -86,000                                           
          cash paid for extinguishment of debt
                                                                                        
          exploratory dry hole expense
                                             8,000 -5,000 -19,000 13,752,000 -36,000 6,621,000 16,275,000 21,583,000 16,385,000   -32,000 -8,000 5,727,000 159,000 2,310,000 10,353,000 7,592,000 606,000 228,000 49,000 40,000 327,000 163,000 2,961,000 182,000 4,573,000 94,000 240,000 -23,000 5,916,000 690,000 1,651,000 11,220,000 9,569,000 6,158,000 3,640,000 246,000 5,590,000 2,102,000  
          impairment of other property and equipment
                                                                                        
          plugging and abandonment
                                         -640,000 -486,000 -418,000 -1,191,000 -992,000 -2,506,000 -2,112,000 -604,000 -1,956,000 -2,154,000 -961,000 -2,425,000 -2,603,000 -2,974,000 -1,894,000 -1,325,000 -2,493,000 -3,707,000   -1,052,000 -288,000   -2,914,000      -14,286,000                 
          acquisition deposit held in escrow
                                                                                        
          net change in cash and cash equivalents
                                          -118,106,000 -99,626,000 649,775,000 -971,294,000   33,000 -179,000 115,000 60,000 -98,000 -149,000 -163,525,000 -72,641,000 -45,813,000 282,072,000 89,000 -5,839,000 5,742,000 -102,000 -118,908,000 89,271,000 96,003,000 186,217,000   29,775,000 -9,868,000 10,128,000 8,178,000 -3,920,000 735,000 -31,523,000 29,408,000 -35,999,000 26,270,000 24,715,000 3,269,000   46,137,000 -11,672,000 4,150,000  
          cash and cash equivalents at beginning of period
                                          9,372,000 18,000 120,000 282,248,000 5,926,000 119,194,000 5,077,000 5,077,000 10,649,000 10,649,000 6,131,000 43,510,000 1,464,000 1,464,000 14,925,000 14,925,000 6,418,000 6,619,000 
          cash and cash equivalents at end of period
                                          -118,106,000 -99,626,000 659,147,000 -971,294,000 980,648,000 -33,000 51,000 -179,000 115,000 60,000 22,000 -149,000 -163,525,000 -72,641,000 236,435,000 282,072,000 89,000 87,000 5,742,000 -102,000 286,000 89,271,000 101,080,000 191,294,000 -2,012,000 10,249,000 40,424,000 -9,868,000 10,128,000 8,178,000 2,211,000 735,000 -31,523,000 29,408,000 7,511,000 26,270,000 26,179,000 4,733,000 448,000 1,825,000 61,062,000 -11,672,000 10,568,000 2,782,000 
          amortization of discount and deferred financing costs
                                            4,946,000 4,251,000                                           
          change in net profits plan liability
                                             -751,000 -8,314,000 3,125,000 -1,260,000 -6,351,000 -4,364,000 -4,476,000 -4,334,000 -14,569,000 -6,399,000 -7,105,000 -1,776,000 -15,419,000 940,000 -5,438,000 -1,925,000 -11,562,000 798,000 -22,079,000 3,939,000 -758,000 211,000 14,195,000    6,963,000 6,804,000 2,449,000 -23,291,000 -80,941,000 -34,867,000 68,142,000 13,626,000 43,875,000 3,805,000 4,965,000 6,389,000 21,080,000 7,021,000  16,396,000  
          derivative loss
                                              -28,037,000    -212,253,000 80,929,000 -154,167,000  -190,661,000 126,469,000 97,662,000                                
          proceeds from sale of common stock
                                                 1,687,000   1,979,000 408,000   2,408,000 798,000 2,880,000 772,000 2,395,000 533,000 1,850,000 1,038,000 1,734,000 4,929,000 3,460,000 3,324,000 2,916,000 268,000 1,931,000 113,000 894,000 172,000 561,000 643,000 10,356,000 328,000 3,665,000 5,378,000 779,000 1,670,000 14,919,000    1,405,000 
          derivative gain
                                                -14,228,000         11,605,000                               
          refundable income taxes
                                                5,085,000         -1,776,000 -138,000 397,000 251,000 -122,000 -639,000 -28,000 3,006,000 -5,581,000 5,348,000 3,730,000 -7,111,000 9,558,000 13,003,000 -29,952,000 -2,821,000 13,161,000 -8,578,000 5,271,000 -9,854,000 933,000 2,164,000 775,000        
          repayment of senior notes
                                                                                      
          derivative cash settlements
                                                  105,688,000 131,486,000 160,133,000                                    
          net proceeds from sale of oil and gas properties
                                                   313,415,000 21,573,000 1,990,000 -4,953,000 44,842,000 1,979,000 404,351,000 155,000 16,036,000 4,307,000 6,712,000 33,253,000 13,731,000 1,679,000 39,469,000 97,952,000 39,023,000 52,003,000 247,998,000                   
          loss on divestiture activity
                                                    35,802,000    -2,958,000 -28,484,000 6,216,000   -4,228,000 8,532,000                          
          repayment of 3.50% senior convertible notes
                                                                                       
          derivative cash settlement gain
                                                      -274,000 -33,680,000 -28,940,000 9,347,000                               
          deferred financing costs related to credit facility
                                                                                       
          net proceeds from 2024 notes
                                                                                        
          gain on divestiture activity
                                                                -1,462,000 24,986,000                       
          impairment of properties
                                                        2,801,000    21,521,000                            
          receipts from restricted cash related to 1031 exchange
                                                                                        
          net proceeds from 5.0% senior notes due 2024
                                                          -546,000                              
          net proceeds from 6.50% senior notes due 2023
                                                             -85,000 -113,000                          
          unrealized derivative gain
                                                                                        
          unrealized derivative loss
                                                            42,364,000   -81,666,000 7,652,000  24,160,000 82,012,000 12,994,000   3,218,000 4,117,000 11,288,000 1,846,000 -12,011,000 -4,429,000 -1,186,000 6,417,000 3,234,000 5,104,000 3,904,000 1,765,000 5,261,000 470,000 305,000 1,370,000  
          excess income tax benefit from the exercise of stock awards
                                                                  6,791,000 6,303,000                     
          acquisition of oil and gas properties
                                                             -169,000 -292,000         -18,000 -14,000 9,000 -53,000 1,610,000 -20,506,000 -9,896,000 -53,031,000 -150,233,000        -1,213,000 
          net proceeds from 6.625% senior notes due 2019
                                                                                        
          net proceeds from 6.50% senior notes due 2021
                                                                                        
          repayment of 3.50% convertible notes
                                                                                        
          net proceeds from 6.625% senior notes
                                                                 341,435,000 341,435,000                     
          impairment of materials inventory
                                                                       774,000 2,114,000 2,719,000 8,616,000              
          bad debt recovery
                                                                                        
          loss related to hurricanes
                                                                       28,000 1,153,000 5,027,000 2,093,000             
          proceeds from insurance settlement
                                                                       1,453,000        -1,116,000 7,049,000        
          net proceeds from 6.50% senior notes
                                                                                        
          adjustments to reconcile net income to net cash provided by operating activities:
                                                                                        
          deposits to restricted cash
                                                                                        
          impairment of goodwill
                                                                                        
          bad debt expense
                                                                           143,000 6,650,000            
          loss on insurance settlement
                                                                                        
          receipts from (deposits to) restricted cash
                                                                                        
          (gain) loss on divestiture activity
                                                                                        
          excess income tax benefit from the exercise of stock options
                                                                     938,000                   
          receipts from restricted cash
                                                                       10,050,000 4,348,000              
          receipts from short-term investments
                                                                                       
          proceeds from sale of oil and gas properties
                                                                      239,247,000 38,761,000 56,000 18,000 1,063,000 23,664,000 606,000 24,197,000 130,400,000 171,000 324,000 324,000 -323,000 182,000  2,000 101,000 201,000 
          adjustments to reconcile net income to net cash
                                                                                        
          provided by operating activities:
                                                                                        
          (gain) loss on divestiture activities
                                                                                        
          depletion, depreciation, amortization,
                                                                                        
          and asset retirement obligation liability accretion
                                                                       75,140,000 66,958,000 70,391,000 91,712,000 95,260,000 72,362,000 76,354,000 70,354,000 64,919,000         
          stock-based compensation expense*
                                                                       5,787,000 5,469,000 3,733,000 3,776,000 4,335,000 3,420,000            
          (gain) loss on insurance settlement
                                                                           696,000 640,000            
          excess income tax benefit associated with stock awards
                                                                                        
          deposits to short-term investments
                                                                            -12,000            
          repayment of short-term note payable
                                                                                       
          proceeds from issuance of senior convertible debt, net of
                                                                                        
          deferred financing cost
                                                                                        
          * stock-based compensation expense is a component of exploration expense and general and administrative expense on
                                                                                        
          the consolidated statements of operations. for the years ended december 31, 2009, 2008, and 2007, respectively,
                                                                                        
          6.3 million, 5.8 million, and 3.2 million of stock-based compensation expense was included in exploration expense.
                                                                                        
          for the years ended december 31, 2009, 2008, and 2007, respectively, 12.5 million, 9.0 million, and 6.9 million of
                                                                                        
          stock-based compensation expense was included in general and administrative expense.
                                                                                        
          reconciliation of net income to net cash provided
                                                                                        
          by operating activities:
                                                                                        
          loss on divestiture activities
                                                                                        
          the consolidated statements of operations. for the nine months ended september 30, 2009, and 2008, respectively,
                                                                                        
          approximately 4.4 million and 3.8 million of stock-based compensation expense was included in exploration expense.
                                                                                        
          for the nine months ended september 30, 2009, and 2008, respectively, approximately 8.6 million and 6.7 million of
                                                                                        
          gain on sale of proved properties
                                                                            4,992,000 -3,038,000 -56,017,000       -2,000  -2,000 
          * stock-based compensation expense is a component of exploration expense and general and
                                                                                        
          administrative expense on the consolidated statements of operations. for the six months ended june 30, 2009,
                                                                                        
          and 2008, respectively, approximately 2.9 million and 2.2 million of stock-based compensation
                                                                                        
          expense was included in exploration expense. for the six months ended june 30, 2009, and 2008,
                                                                                        
          respectively, approximately 4.6 million and 4.9 million of stock-based compensation expense was
                                                                                        
          included in general and administrative expense.
                                                                                        
          (gain) loss on sale of proved properties
                                                                          599,000              
          amortization of debt discount
                                                                          2,092,000              
          the consolidated statements of operations. for the three months ended march 31, 2009, and 2008, respectively,
                                                                                        
          approximately 1.6 million and 1.1 million of stock-based compensation expense was included in exploration expense. for
                                                                                        
          both the three months ended march 31, 2009, and 2008, approximately 2.2 million of stock-based compensation expense
                                                                                        
          was included in general and administrative expense.
                                                                                        
          net proceeds from issuance of senior convertible debt
                                                                                        
          * stock-based compensation expense is a component of exploration expense and general and administrative expense
                                                                                        
          on the consolidated statements of operations. during 2008, 2007, and 2006, respectively, approximately 5.8 million,
                                                                                        
          3.2 million, and 3.1 million of stock-based compensation expense was included in exploration expense.
                                                                                        
          during 2008, 2007, and 2006, respectively, approximately 9.0 million, 6.9 million, and 8.3 million of stock-based
                                                                                        
          compensation expense was included in general and administrative expense.
                                                                                        
          excess tax benefit from the exercise of stock options
                                                                                        
          deposits for acquisition of oil and gas assets
                                                                                        
          on the consolidated statements of operations. during the periods ended september 30, 2008, and 2007, respectively,
                                                                                        
          approximately 3.8 million and 2.6 million of stock-based compensation expense was included in exploration expense.
                                                                                        
          during the periods ended september 30, 2008, and 2007, respectively, approximately 6.7 million and 6.0 million of
                                                                                        
          hedge margin deposit
                                                                                        
          income tax benefit from the exercise of stock options
                                                                             -8,705,000 -860,000  3,762,000 913,000    2,046,000 2,747,000  
          on the consolidated statements of operations. during the periods ended june 30, 2008, and 2007, respectively,
                                                                                        
          approximately 2.2 million and 1.9 million of stock-based compensation expense was included in exploration expense.
                                                                                        
          during the periods ended june 30, 2008, and 2007, respectively, approximately 4.9 million and 4.4 million of
                                                                                        
          stock-based compensation expense is a component of exploration expense and general and administrative expense
                                                                                        
          on the consolidated statements of operations. during the periods ended march 31, 2008, and 2007, respectively,
                                                                                        
          1.1 million and 1.0 million of stock-based compensation expense was included in exploration expense.
                                                                                        
          during the periods ended march 31, 2008, and 2007, respectively, 2.2 million and 1.9 million of stock-based
                                                                                        
          gain on insurance settlement
                                                                               1,097,000         
          income tax benefit from the exercise of stock options**
                                                                                        
          proceeds from short-term note payable
                                                                                        
          deferred financing costs
                                                                                        
          * stock-based compensation expense is a component of exploration expense and general and administrative expense on the
                                                                                        
          consolidated statements of operations. during 2007, 2006, and 2005, respectively, approximately 3.2 million, 3.1 million, and
                                                                                        
          3.3 million, of stock-based compensation expense was included in exploration expense. during 2007, 2006, and 2005, repectively,
                                                                                        
          approximately 6.9 million, 8.3 million, and 3.9 million of stock-based compensation expense was included in general and administrative
                                                                                        
          expense.
                                                                                        
          ** sfas 123(r) requires presentation of the income tax benefit from the exercise of stock options to be presented in financing
                                                                                        
          activities subsequent to adoption. the prior period classification is to remain unchanged under sfas 123(r).
                                                                                        
          deposits to short-term investments available-for-sale
                                                                                     -1,502,000  
          receipts from short-term investments available-for-sale
                                                                                1,450,000     1,402,000  
          proceeds from issuance of senior convertible debt - net
                                                                                        
          reconciliation of net income to net cash from operating activities:
                                                                                        
          proceeds from issuance of convertible debt
                                                                                281,194,000        
          audit report of independent registered public accounting firm
                                                                                        
          consolidated balance sheets
                                                                                        
          consolidated statements of operations
                                                                                        
          consolidated statements of stockholders’ equity and comprehensive income
                                                                                        
          consolidated statements of cash flows
                                                                                        
          notes to consolidated financial statements
                                                                                        
          adjustments to reconcile net income to net cashprovided by operating
                                                                                        
          activities:
                                                                                        
          depletion, depreciation, amortization, and abandonment liability accretion
                                                                                   70,301,000 34,391,000    
          income tax benefit from the exercise of stock options*
                                                                                  974,000 14,236,000     
          depletion, depreciation, amortization, and asset retirement obligation accretion
                                                                                        
          abandonment and impairment of oil and gas properties
                                                                                        
          dividends
                                                                                        
          loss on sale of proved properties
                                                                                      26,000  
          proceeds from sale of common stock for exercise of stock options
                                                                                    2,043,000  6,455,000  
          depletion, depreciation, amortization
                                                                                        
          and abandonment liability accretion
                                                                                     31,825,000 63,981,000  
          deferred and accrued stock-based compensation
                                                                                     1,794,000 2,301,000  
          cumulative effect of change in accounting principle, net of tax
                                                                                        
          changes in current assets and liabilities, net of acquisitions:
                                                                                        
          acquisition of oil and gas properties, including related
                                                                                        
          71,594 loan to flying j in 2003
                                                                                        
          adjustments to reconcile net income to net
                                                                                        
          cash from operating activities:
                                                                                        
          change in net profits interest plan liability
                                                                                        
          acquisition of oil and gas properties, net of cash received
                                                                                      -35,145,000  
          reconciliation of net income to net cash from operating activitites:
                                                                                        
          unrealized hedge loss
                                                                                       262,000 
          depletion, depreciation and amortization
                                                                                       11,288,000 
          exploration, including exploratory dry hole expense
                                                                                       4,845,000 
          minority interest and other
                                                                                       414,000 
          net cash from operating activitites
                                                                                       48,580,000 
          proceeds from disposition of kmoc stock
                                                                                       7,009,000 
          proceeds from long-term debt
                                                                                       13,550,000 
          repayment of long-term debt
                                                                                       -35,550,000