Condensed Consolidating Financial Information - Condensed Consolidating Statement of Operations (Details) - USD ($) |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2016 |
Sep. 30, 2016 |
Jun. 30, 2016 |
Mar. 31, 2016 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Revenues: | |||||||||||
| Total revenues | $ 397,848,000 | $ 265,498,000 | $ 323,953,000 | $ 333,004,000 | $ 63,416,000 | $ 193,691,000 | $ (28,158,000) | $ 156,961,000 | $ 1,320,303,000 | $ 385,910,000 | $ 708,990,000 |
| Costs and expenses: | |||||||||||
| Lease operating expenses | 80,246,000 | 68,877,000 | 69,475,000 | ||||||||
| Production taxes | 21,126,000 | 13,276,000 | 14,740,000 | ||||||||
| Midstream gathering and processing | 248,995,000 | 165,972,000 | 138,590,000 | ||||||||
| Depreciation, depletion and amortization | 364,629,000 | 245,974,000 | 337,694,000 | ||||||||
| Impairment of oil and natural gas properties | 0 | 715,495,000 | 1,440,418,000 | ||||||||
| General and administrative | 52,938,000 | 43,409,000 | 41,967,000 | ||||||||
| Accretion expense | 1,611,000 | 1,057,000 | 820,000 | ||||||||
| Acquisition expense | 2,392,000 | 0 | 0 | ||||||||
| Total costs and expenses | 771,937,000 | 1,254,060,000 | 2,043,704,000 | ||||||||
| INCOME (LOSS) FROM OPERATIONS | 173,025,000 | 50,483,000 | 143,175,000 | 181,683,000 | (190,949,000) | (157,995,000) | (323,412,000) | (195,794,000) | 548,366,000 | (868,150,000) | (1,334,714,000) |
| OTHER (INCOME) EXPENSE: | |||||||||||
| Interest expense | 108,198,000 | 63,530,000 | 51,221,000 | ||||||||
| Interest income | (1,009,000) | (1,230,000) | (643,000) | ||||||||
| Insurance proceeds | 0 | (5,718,000) | (10,015,000) | ||||||||
| Loss (income) from equity method investments | 5,257,000 | 33,985,000 | 106,093,000 | ||||||||
| Other (income) expense | (1,041,000) | 129,000 | (485,000) | ||||||||
| Total Other (Income) Expense | 111,405,000 | 114,472,000 | 146,171,000 | ||||||||
| INCOME (LOSS) BEFORE INCOME TAXES | 436,961,000 | (982,622,000) | (1,480,885,000) | ||||||||
| INCOME TAX EXPENSE (BENEFIT) | (954,000) | 2,763,000 | 0 | 0 | 842,000 | (3,407,000) | (157,000) | (191,000) | 1,809,000 | (2,913,000) | (256,001,000) |
| NET INCOME (LOSS) | $ 156,526,000 | $ 18,235,000 | $ 105,936,000 | $ 154,455,000 | $ (240,370,000) | $ (157,296,000) | $ (339,776,000) | $ (242,267,000) | 435,152,000 | (979,709,000) | (1,224,884,000) |
| Gain (Loss) on Extinguishment of Debt | 0 | (23,776,000) | 0 | ||||||||
| Parent | |||||||||||
| Revenues: | |||||||||||
| Total revenues | 1,010,989,000 | 381,931,000 | 707,868,000 | ||||||||
| Costs and expenses: | |||||||||||
| Lease operating expenses | 65,793,000 | 68,034,000 | 68,632,000 | ||||||||
| Production taxes | 15,100,000 | 13,121,000 | 14,618,000 | ||||||||
| Midstream gathering and processing | 187,678,000 | 165,400,000 | 138,526,000 | ||||||||
| Depreciation, depletion and amortization | 364,625,000 | 245,970,000 | 337,689,000 | ||||||||
| Impairment of oil and natural gas properties | 715,495,000 | 1,440,418,000 | |||||||||
| General and administrative | 55,589,000 | 43,896,000 | 41,892,000 | ||||||||
| Accretion expense | 1,246,000 | 1,057,000 | 820,000 | ||||||||
| Acquisition expense | 0 | ||||||||||
| Total costs and expenses | 690,031,000 | 1,252,973,000 | 2,042,595,000 | ||||||||
| INCOME (LOSS) FROM OPERATIONS | 320,958,000 | (871,042,000) | (1,334,727,000) | ||||||||
| OTHER (INCOME) EXPENSE: | |||||||||||
| Interest expense | 112,732,000 | 63,529,000 | 51,221,000 | ||||||||
| Interest income | (988,000) | (1,230,000) | (643,000) | ||||||||
| Insurance proceeds | (5,718,000) | (10,015,000) | |||||||||
| Loss (income) from equity method investments | (226,130,000) | 31,078,000 | 107,252,000 | ||||||||
| Other (income) expense | (1,617,000) | 145,000 | (1,657,000) | ||||||||
| Total Other (Income) Expense | (116,003,000) | 111,580,000 | 146,158,000 | ||||||||
| INCOME (LOSS) BEFORE INCOME TAXES | 436,961,000 | (982,622,000) | (1,480,885,000) | ||||||||
| INCOME TAX EXPENSE (BENEFIT) | 1,809,000 | (2,913,000) | (256,001,000) | ||||||||
| NET INCOME (LOSS) | 435,152,000 | (979,709,000) | (1,224,884,000) | ||||||||
| Gain (Loss) on Extinguishment of Debt | (23,776,000) | ||||||||||
| Guarantors | |||||||||||
| Revenues: | |||||||||||
| Total revenues | 309,314,000 | 3,979,000 | 1,122,000 | ||||||||
| Costs and expenses: | |||||||||||
| Lease operating expenses | 14,453,000 | 843,000 | 843,000 | ||||||||
| Production taxes | 6,026,000 | 155,000 | 122,000 | ||||||||
| Midstream gathering and processing | 61,317,000 | 572,000 | 64,000 | ||||||||
| Depreciation, depletion and amortization | 4,000 | 4,000 | 5,000 | ||||||||
| Impairment of oil and natural gas properties | 0 | 0 | |||||||||
| General and administrative | (2,654,000) | (490,000) | 55,000 | ||||||||
| Accretion expense | 365,000 | 0 | 0 | ||||||||
| Acquisition expense | 2,392,000 | ||||||||||
| Total costs and expenses | 81,903,000 | 1,084,000 | 1,089,000 | ||||||||
| INCOME (LOSS) FROM OPERATIONS | 227,411,000 | 2,895,000 | 33,000 | ||||||||
| OTHER (INCOME) EXPENSE: | |||||||||||
| Interest expense | (4,534,000) | 1,000 | 0 | ||||||||
| Interest income | (21,000) | 0 | 0 | ||||||||
| Insurance proceeds | 0 | 0 | |||||||||
| Loss (income) from equity method investments | 1,955,000 | (89,000) | 0 | ||||||||
| Other (income) expense | (324,000) | (16,000) | (346,000) | ||||||||
| Total Other (Income) Expense | (2,924,000) | (104,000) | (346,000) | ||||||||
| INCOME (LOSS) BEFORE INCOME TAXES | 230,335,000 | 2,999,000 | 379,000 | ||||||||
| INCOME TAX EXPENSE (BENEFIT) | 0 | 0 | 0 | ||||||||
| NET INCOME (LOSS) | 230,335,000 | 2,999,000 | 379,000 | ||||||||
| Gain (Loss) on Extinguishment of Debt | 0 | ||||||||||
| Non-Guarantor | |||||||||||
| Revenues: | |||||||||||
| Total revenues | 0 | 0 | 0 | ||||||||
| Costs and expenses: | |||||||||||
| Lease operating expenses | 0 | 0 | 0 | ||||||||
| Production taxes | 0 | 0 | 0 | ||||||||
| Midstream gathering and processing | 0 | 0 | 0 | ||||||||
| Depreciation, depletion and amortization | 0 | 0 | 0 | ||||||||
| Impairment of oil and natural gas properties | 0 | 0 | |||||||||
| General and administrative | 3,000 | 3,000 | 20,000 | ||||||||
| Accretion expense | 0 | 0 | 0 | ||||||||
| Acquisition expense | 0 | ||||||||||
| Total costs and expenses | 3,000 | 3,000 | 20,000 | ||||||||
| INCOME (LOSS) FROM OPERATIONS | (3,000) | (3,000) | (20,000) | ||||||||
| OTHER (INCOME) EXPENSE: | |||||||||||
| Interest expense | 0 | 0 | 0 | ||||||||
| Interest income | 0 | 0 | 0 | ||||||||
| Insurance proceeds | 0 | 0 | |||||||||
| Loss (income) from equity method investments | 2,189,000 | 25,150,000 | 115,544,000 | ||||||||
| Other (income) expense | 0 | 0 | 0 | ||||||||
| Total Other (Income) Expense | 2,189,000 | 25,150,000 | 115,544,000 | ||||||||
| INCOME (LOSS) BEFORE INCOME TAXES | (2,192,000) | (25,153,000) | (115,564,000) | ||||||||
| INCOME TAX EXPENSE (BENEFIT) | 0 | 0 | 0 | ||||||||
| NET INCOME (LOSS) | (2,192,000) | (25,153,000) | (115,564,000) | ||||||||
| Gain (Loss) on Extinguishment of Debt | 0 | ||||||||||
| Eliminations | |||||||||||
| Revenues: | |||||||||||
| Total revenues | 0 | 0 | 0 | ||||||||
| Costs and expenses: | |||||||||||
| Lease operating expenses | 0 | 0 | 0 | ||||||||
| Production taxes | 0 | 0 | 0 | ||||||||
| Midstream gathering and processing | 0 | 0 | 0 | ||||||||
| Depreciation, depletion and amortization | 0 | 0 | 0 | ||||||||
| Impairment of oil and natural gas properties | 0 | 0 | |||||||||
| General and administrative | 0 | 0 | 0 | ||||||||
| Accretion expense | 0 | 0 | 0 | ||||||||
| Acquisition expense | 0 | ||||||||||
| Total costs and expenses | 0 | 0 | 0 | ||||||||
| INCOME (LOSS) FROM OPERATIONS | 0 | 0 | 0 | ||||||||
| OTHER (INCOME) EXPENSE: | |||||||||||
| Interest expense | 0 | 0 | 0 | ||||||||
| Interest income | 0 | 0 | 0 | ||||||||
| Insurance proceeds | 0 | 0 | |||||||||
| Loss (income) from equity method investments | 227,243,000 | (22,154,000) | (116,703,000) | ||||||||
| Other (income) expense | 900,000 | 0 | 1,518,000 | ||||||||
| Total Other (Income) Expense | 228,143,000 | (22,154,000) | (115,185,000) | ||||||||
| INCOME (LOSS) BEFORE INCOME TAXES | (228,143,000) | 22,154,000 | 115,185,000 | ||||||||
| INCOME TAX EXPENSE (BENEFIT) | 0 | 0 | 0 | ||||||||
| NET INCOME (LOSS) | $ (228,143,000) | 22,154,000 | $ 115,185,000 | ||||||||
| Gain (Loss) on Extinguishment of Debt | $ 0 | ||||||||||