CONDENSED CONSOLIDATING FINANCIAL INFORMATION (Statements of Operations) (Details) - USD ($) |
3 Months Ended | 9 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|
Sep. 30, 2019 |
Jun. 30, 2019 |
Mar. 31, 2019 |
Sep. 30, 2018 |
Jun. 30, 2018 |
Mar. 31, 2018 |
Sep. 30, 2019 |
Sep. 30, 2018 |
|
| Revenues: | ||||||||
| Total revenues | $ 285,175,000 | $ 360,962,000 | $ 1,064,747,000 | $ 939,094,000 | ||||
| Costs and expenses: | ||||||||
| Lease operating expenses | 22,473,000 | 22,325,000 | 64,668,000 | 64,143,000 | ||||
| Production taxes | 6,565,000 | 9,348,000 | 22,584,000 | 23,861,000 | ||||
| Midstream gathering and processing expenses | 78,435,000 | 78,913,000 | 220,732,000 | 214,546,000 | ||||
| Depreciation, depletion and amortization | 145,490,000 | 119,915,000 | 388,874,000 | 352,848,000 | ||||
| Impairment of oil and natural gas properties | 35,647,000 | 0 | 35,647,000 | 0 | ||||
| General and administrative expenses | 14,659,000 | 15,848,000 | 39,482,000 | 42,955,000 | ||||
| Accretion expense | 747,000 | 1,037,000 | 3,173,000 | 3,056,000 | ||||
| Total costs and expenses | 304,016,000 | 247,386,000 | 775,160,000 | 701,409,000 | ||||
| (LOSS) INCOME FROM OPERATIONS | (18,841,000) | 113,576,000 | 289,587,000 | 237,685,000 | ||||
| OTHER EXPENSE (INCOME): | ||||||||
| Interest expense | 34,095,000 | 33,253,000 | 103,095,000 | 100,922,000 | ||||
| Interest income | (338,000) | (92,000) | (649,000) | (162,000) | ||||
| Gain on sale of equity method investments | 0 | (2,733,000) | 0 | (124,768,000) | ||||
| Gain on debt extinguishment | (23,600,000) | 0 | (23,600,000) | 0 | ||||
| (Income) loss from equity method investments and investments in subsidiaries | 43,082,000 | (12,858,000) | 164,391,000 | (35,282,000) | ||||
| Other expense | 3,194,000 | 856,000 | 3,757,000 | 485,000 | ||||
| Total other (income) expense | 56,433,000 | 18,426,000 | 246,994,000 | (58,805,000) | ||||
| LOSS BEFORE INCOME TAXES | (75,274,000) | 95,150,000 | 42,593,000 | 296,490,000 | ||||
| INCOME TAX BENEFIT | (26,522,000) | 0 | (205,853,000) | (69,000) | ||||
| NET LOSS | (48,752,000) | $ 234,956,000 | $ 62,242,000 | 95,150,000 | $ 111,319,000 | $ 90,090,000 | 248,446,000 | 296,559,000 |
| Parent | ||||||||
| OTHER EXPENSE (INCOME): | ||||||||
| Gain on debt extinguishment | (23,600,000) | (23,600,000) | ||||||
| Guarantors | ||||||||
| OTHER EXPENSE (INCOME): | ||||||||
| Gain on debt extinguishment | 0 | 0 | ||||||
| Non-Guarantors | ||||||||
| OTHER EXPENSE (INCOME): | ||||||||
| Gain on debt extinguishment | 0 | 0 | ||||||
| Reportable legal entities | Parent | ||||||||
| Revenues: | ||||||||
| Total revenues | 27,358,000 | 235,683,000 | 493,895,000 | 596,018,000 | ||||
| Costs and expenses: | ||||||||
| Lease operating expenses | (231,000) | 16,502,000 | 26,918,000 | 46,926,000 | ||||
| Production taxes | 36,000 | 4,505,000 | 6,117,000 | 13,309,000 | ||||
| Midstream gathering and processing expenses | 0 | 54,397,000 | 71,420,000 | 152,605,000 | ||||
| Depreciation, depletion and amortization | 2,699,000 | 119,914,000 | 201,263,000 | 352,846,000 | ||||
| Impairment of oil and natural gas properties | 0 | 0 | ||||||
| General and administrative expenses | 27,218,000 | 16,314,000 | 56,195,000 | 45,100,000 | ||||
| Accretion expense | 0 | 812,000 | 1,389,000 | 2,397,000 | ||||
| Total costs and expenses | 29,722,000 | 212,444,000 | 363,302,000 | 613,183,000 | ||||
| (LOSS) INCOME FROM OPERATIONS | (2,364,000) | 23,239,000 | 130,593,000 | (17,165,000) | ||||
| OTHER EXPENSE (INCOME): | ||||||||
| Interest expense | 35,105,000 | 34,254,000 | 105,364,000 | 103,310,000 | ||||
| Interest income | (187,000) | (86,000) | (454,000) | (144,000) | ||||
| Gain on sale of equity method investments | (2,733,000) | (28,349,000) | ||||||
| (Income) loss from equity method investments and investments in subsidiaries | 62,760,000 | (104,226,000) | 7,295,000 | (387,991,000) | ||||
| Other expense | (1,168,000) | 880,000 | (605,000) | (481,000) | ||||
| Total other (income) expense | 72,910,000 | (71,911,000) | 88,000,000 | (313,655,000) | ||||
| LOSS BEFORE INCOME TAXES | (75,274,000) | 95,150,000 | 42,593,000 | 296,490,000 | ||||
| INCOME TAX BENEFIT | (26,522,000) | 0 | (205,853,000) | (69,000) | ||||
| NET LOSS | (48,752,000) | 95,150,000 | 248,446,000 | 296,559,000 | ||||
| Reportable legal entities | Guarantors | ||||||||
| Revenues: | ||||||||
| Total revenues | 257,817,000 | 125,279,000 | 570,852,000 | 343,076,000 | ||||
| Costs and expenses: | ||||||||
| Lease operating expenses | 22,704,000 | 5,823,000 | 37,750,000 | 17,217,000 | ||||
| Production taxes | 6,529,000 | 4,843,000 | 16,467,000 | 10,552,000 | ||||
| Midstream gathering and processing expenses | 78,435,000 | 24,516,000 | 149,312,000 | 61,941,000 | ||||
| Depreciation, depletion and amortization | 142,625,000 | 1,000 | 187,390,000 | 2,000 | ||||
| Impairment of oil and natural gas properties | 35,647,000 | 35,647,000 | ||||||
| General and administrative expenses | (12,675,000) | (467,000) | (16,933,000) | (2,148,000) | ||||
| Accretion expense | 747,000 | 225,000 | 1,784,000 | 659,000 | ||||
| Total costs and expenses | 274,012,000 | 34,941,000 | 411,417,000 | 88,223,000 | ||||
| (LOSS) INCOME FROM OPERATIONS | (16,195,000) | 90,338,000 | 159,435,000 | 254,853,000 | ||||
| OTHER EXPENSE (INCOME): | ||||||||
| Interest expense | (1,010,000) | (1,001,000) | (2,269,000) | (2,388,000) | ||||
| Interest income | (151,000) | (6,000) | (195,000) | (18,000) | ||||
| Gain on sale of equity method investments | 0 | (96,419,000) | ||||||
| (Income) loss from equity method investments and investments in subsidiaries | 0 | (1,000) | 0 | (694,000) | ||||
| Other expense | 3,362,000 | (24,000) | 3,362,000 | (34,000) | ||||
| Total other (income) expense | 2,201,000 | (1,032,000) | 898,000 | (99,553,000) | ||||
| LOSS BEFORE INCOME TAXES | (18,396,000) | 91,370,000 | 158,537,000 | 354,406,000 | ||||
| INCOME TAX BENEFIT | 0 | 0 | 0 | 0 | ||||
| NET LOSS | (18,396,000) | 91,370,000 | 158,537,000 | 354,406,000 | ||||
| Reportable legal entities | Non-Guarantors | ||||||||
| Revenues: | ||||||||
| Total revenues | 0 | 0 | 0 | 0 | ||||
| Costs and expenses: | ||||||||
| Lease operating expenses | 0 | 0 | 0 | 0 | ||||
| Production taxes | 0 | 0 | 0 | 0 | ||||
| Midstream gathering and processing expenses | 0 | 0 | 0 | 0 | ||||
| Depreciation, depletion and amortization | 166,000 | 0 | 221,000 | 0 | ||||
| Impairment of oil and natural gas properties | 0 | 0 | ||||||
| General and administrative expenses | 116,000 | 1,000 | 220,000 | 3,000 | ||||
| Accretion expense | 0 | 0 | 0 | 0 | ||||
| Total costs and expenses | 282,000 | 1,000 | 441,000 | 3,000 | ||||
| (LOSS) INCOME FROM OPERATIONS | (282,000) | (1,000) | (441,000) | (3,000) | ||||
| OTHER EXPENSE (INCOME): | ||||||||
| Interest expense | 0 | 0 | 0 | 0 | ||||
| Interest income | 0 | 0 | 0 | 0 | ||||
| Gain on sale of equity method investments | 0 | 0 | ||||||
| (Income) loss from equity method investments and investments in subsidiaries | 40,000 | 275,000 | 379,000 | 833,000 | ||||
| Other expense | 0 | 0 | 0 | 0 | ||||
| Total other (income) expense | 40,000 | 275,000 | 379,000 | 833,000 | ||||
| LOSS BEFORE INCOME TAXES | (322,000) | (276,000) | (820,000) | (836,000) | ||||
| INCOME TAX BENEFIT | 0 | 0 | 0 | 0 | ||||
| NET LOSS | (322,000) | (276,000) | (820,000) | (836,000) | ||||
| Eliminations | ||||||||
| Revenues: | ||||||||
| Total revenues | 0 | 0 | 0 | 0 | ||||
| Costs and expenses: | ||||||||
| Lease operating expenses | 0 | 0 | 0 | 0 | ||||
| Production taxes | 0 | 0 | 0 | 0 | ||||
| Midstream gathering and processing expenses | 0 | 0 | 0 | 0 | ||||
| Depreciation, depletion and amortization | 0 | 0 | 0 | 0 | ||||
| Impairment of oil and natural gas properties | 0 | 0 | ||||||
| General and administrative expenses | 0 | 0 | 0 | 0 | ||||
| Accretion expense | 0 | 0 | 0 | 0 | ||||
| Total costs and expenses | 0 | 0 | 0 | 0 | ||||
| (LOSS) INCOME FROM OPERATIONS | 0 | 0 | 0 | 0 | ||||
| OTHER EXPENSE (INCOME): | ||||||||
| Interest expense | 0 | 0 | 0 | 0 | ||||
| Interest income | 0 | 0 | 0 | 0 | ||||
| Gain on sale of equity method investments | 0 | 0 | ||||||
| Gain on debt extinguishment | 0 | 0 | ||||||
| (Income) loss from equity method investments and investments in subsidiaries | (19,718,000) | 91,094,000 | 156,717,000 | 352,570,000 | ||||
| Other expense | 1,000,000 | 0 | 1,000,000 | 1,000,000 | ||||
| Total other (income) expense | (18,718,000) | 91,094,000 | 157,717,000 | 353,570,000 | ||||
| LOSS BEFORE INCOME TAXES | 18,718,000 | (91,094,000) | (157,717,000) | (353,570,000) | ||||
| INCOME TAX BENEFIT | 0 | 0 | 0 | 0 | ||||
| NET LOSS | $ 18,718,000 | $ (91,094,000) | $ (157,717,000) | $ (353,570,000) | ||||