Condensed Consolidating Financial Information - Statement of Operations (Details) - USD ($)
|
3 Months Ended |
12 Months Ended |
Dec. 31, 2019 |
Sep. 30, 2019 |
Jun. 30, 2019 |
Mar. 31, 2019 |
Dec. 31, 2018 |
Sep. 30, 2018 |
Jun. 30, 2018 |
Mar. 31, 2018 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Revenues: |
|
|
|
|
|
|
|
|
|
|
|
Total revenues |
$ 281,261,000
|
$ 285,175,000
|
$ 458,994,000
|
$ 320,578,000
|
$ 415,950,000
|
$ 360,962,000
|
$ 252,740,000
|
$ 325,392,000
|
$ 1,346,008,000
|
$ 1,355,044,000
|
$ 1,320,303,000
|
Costs and expenses: |
|
|
|
|
|
|
|
|
|
|
|
Lease operating expenses |
|
|
|
|
|
|
|
|
82,998,000
|
91,640,000
|
80,246,000
|
Production taxes |
|
|
|
|
|
|
|
|
28,571,000
|
33,480,000
|
21,126,000
|
Depreciation, depletion and amortization |
|
|
|
|
|
|
|
|
550,108,000
|
486,664,000
|
364,629,000
|
Impairment of oil and natural gas properties |
|
|
|
|
|
|
|
|
2,039,770,000
|
0
|
0
|
General and administrative expenses |
|
|
|
|
|
|
|
|
47,979,000
|
49,994,000
|
45,523,000
|
Restructuring costs |
4,600,000
|
|
|
|
|
|
|
|
4,611,000
|
0
|
0
|
Accretion expense |
|
|
|
|
|
|
|
|
3,939,000
|
4,119,000
|
1,611,000
|
Acquisition expense |
|
|
|
|
|
|
|
|
0
|
0
|
2,392,000
|
Total costs and expenses |
|
|
|
|
|
|
|
|
3,049,701,000
|
956,085,000
|
764,522,000
|
(LOSS) INCOME FROM OPERATIONS |
(1,444,205,000)
|
(570,955,000)
|
218,456,000
|
93,011,000
|
156,480,000
|
115,116,000
|
15,373,000
|
111,990,000
|
(1,703,693,000)
|
398,959,000
|
555,781,000
|
OTHER EXPENSE (INCOME): |
|
|
|
|
|
|
|
|
|
|
|
Interest expense |
|
|
|
|
|
|
|
|
141,786,000
|
141,912,000
|
115,613,000
|
Interest income |
|
|
|
|
|
|
|
|
(801,000)
|
(314,000)
|
(1,009,000)
|
Gain on debt extinguishment |
|
|
|
|
|
|
|
|
(48,630,000)
|
0
|
0
|
Gain on sale of equity method investments |
|
|
|
|
|
|
|
|
0
|
(124,768,000)
|
(12,523,000)
|
Loss (income) from equity method investments |
|
|
|
|
|
|
|
|
210,148,000
|
(49,904,000)
|
17,780,000
|
Other expense (income), net |
|
|
|
|
|
|
|
|
3,725,000
|
1,542,000
|
(1,041,000)
|
Total Other (Income) Expense |
|
|
|
|
|
|
|
|
306,228,000
|
(31,532,000)
|
118,820,000
|
(LOSS) INCOME BEFORE INCOME TAXES |
|
|
|
|
|
|
|
|
(2,009,921,000)
|
430,491,000
|
436,961,000
|
Income tax (benefit) expense |
315,815,000
|
(144,047,000)
|
(179,331,000)
|
0
|
0
|
0
|
0
|
(69,000)
|
(7,563,000)
|
(69,000.0)
|
1,809,000
|
NET (LOSS) INCOME |
$ (1,814,754,000)
|
$ (484,802,000)
|
$ 234,956,000
|
$ 62,242,000
|
$ 134,001,000
|
$ 95,150,000
|
$ 111,319,000
|
$ 90,090,000
|
(2,002,358,000)
|
430,560,000
|
435,152,000
|
Parent |
|
|
|
|
|
|
|
|
|
|
|
Revenues: |
|
|
|
|
|
|
|
|
|
|
|
Total revenues |
|
|
|
|
|
|
|
|
524,089,000
|
839,241,000
|
1,010,989,000
|
Costs and expenses: |
|
|
|
|
|
|
|
|
|
|
|
Lease operating expenses |
|
|
|
|
|
|
|
|
26,923,000
|
66,947,000
|
65,793,000
|
Production taxes |
|
|
|
|
|
|
|
|
6,117,000
|
17,140,000
|
15,100,000
|
Depreciation, depletion and amortization |
|
|
|
|
|
|
|
|
203,921,000
|
486,661,000
|
364,625,000
|
Impairment of oil and natural gas properties |
|
|
|
|
|
|
|
|
0
|
|
0
|
General and administrative expenses |
|
|
|
|
|
|
|
|
71,219,000
|
52,664,000
|
48,174,000
|
Restructuring costs |
|
|
|
|
|
|
|
|
4,611,000
|
|
|
Accretion expense |
|
|
|
|
|
|
|
|
1,390,000
|
3,228,000
|
1,246,000
|
Acquisition expense |
|
|
|
|
|
|
|
|
|
|
0
|
Total costs and expenses |
|
|
|
|
|
|
|
|
385,601,000
|
826,247,000
|
682,616,000
|
(LOSS) INCOME FROM OPERATIONS |
|
|
|
|
|
|
|
|
138,488,000
|
12,994,000
|
328,373,000
|
OTHER EXPENSE (INCOME): |
|
|
|
|
|
|
|
|
|
|
|
Interest expense |
|
|
|
|
|
|
|
|
144,645,000
|
144,533,000
|
120,147,000
|
Interest income |
|
|
|
|
|
|
|
|
(501,000)
|
(287,000)
|
(988,000)
|
Gain on debt extinguishment |
|
|
|
|
|
|
|
|
(48,630,000)
|
|
|
Gain on sale of equity method investments |
|
|
|
|
|
|
|
|
|
(28,349,000)
|
(12,523,000)
|
Loss (income) from equity method investments |
|
|
|
|
|
|
|
|
2,053,533,000
|
(532,869,000)
|
(213,607,000)
|
Other expense (income), net |
|
|
|
|
|
|
|
|
(638,000)
|
(525,000)
|
(1,617,000)
|
Total Other (Income) Expense |
|
|
|
|
|
|
|
|
2,148,409,000
|
(417,497,000)
|
(108,588,000)
|
(LOSS) INCOME BEFORE INCOME TAXES |
|
|
|
|
|
|
|
|
(2,009,921,000)
|
430,491,000
|
436,961,000
|
Income tax (benefit) expense |
|
|
|
|
|
|
|
|
(7,563,000)
|
(69,000)
|
1,809,000
|
NET (LOSS) INCOME |
|
|
|
|
|
|
|
|
(2,002,358,000)
|
430,560,000
|
435,152,000
|
Guarantors |
|
|
|
|
|
|
|
|
|
|
|
Revenues: |
|
|
|
|
|
|
|
|
|
|
|
Total revenues |
|
|
|
|
|
|
|
|
821,919,000
|
515,803,000
|
309,314,000
|
Costs and expenses: |
|
|
|
|
|
|
|
|
|
|
|
Lease operating expenses |
|
|
|
|
|
|
|
|
56,075,000
|
24,693,000
|
14,453,000
|
Production taxes |
|
|
|
|
|
|
|
|
22,454,000
|
16,340,000
|
6,026,000
|
Depreciation, depletion and amortization |
|
|
|
|
|
|
|
|
345,504,000
|
3,000
|
4,000
|
Impairment of oil and natural gas properties |
|
|
|
|
|
|
|
|
2,039,770,000
|
|
0
|
General and administrative expenses |
|
|
|
|
|
|
|
|
(23,748,000)
|
(2,673,000)
|
(2,654,000)
|
Restructuring costs |
|
|
|
|
|
|
|
|
0
|
|
|
Accretion expense |
|
|
|
|
|
|
|
|
2,549,000
|
891,000
|
365,000
|
Acquisition expense |
|
|
|
|
|
|
|
|
|
|
2,392,000
|
Total costs and expenses |
|
|
|
|
|
|
|
|
2,662,909,000
|
129,835,000
|
81,903,000
|
(LOSS) INCOME FROM OPERATIONS |
|
|
|
|
|
|
|
|
(1,840,990,000)
|
385,968,000
|
227,411,000
|
OTHER EXPENSE (INCOME): |
|
|
|
|
|
|
|
|
|
|
|
Interest expense |
|
|
|
|
|
|
|
|
(2,859,000)
|
(2,621,000)
|
(4,534,000)
|
Interest income |
|
|
|
|
|
|
|
|
(300,000)
|
(27,000)
|
(21,000)
|
Gain on debt extinguishment |
|
|
|
|
|
|
|
|
0
|
|
|
Gain on sale of equity method investments |
|
|
|
|
|
|
|
|
|
(96,419,000)
|
0
|
Loss (income) from equity method investments |
|
|
|
|
|
|
|
|
|
(694,000)
|
1,955,000
|
Other expense (income), net |
|
|
|
|
|
|
|
|
3,364,000
|
(33,000)
|
(324,000)
|
Total Other (Income) Expense |
|
|
|
|
|
|
|
|
205,000
|
(99,794,000)
|
(2,924,000)
|
(LOSS) INCOME BEFORE INCOME TAXES |
|
|
|
|
|
|
|
|
(1,841,195,000)
|
485,762,000
|
230,335,000
|
Income tax (benefit) expense |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
NET (LOSS) INCOME |
|
|
|
|
|
|
|
|
(1,841,195,000)
|
485,762,000
|
230,335,000
|
Non-Guarantor |
|
|
|
|
|
|
|
|
|
|
|
Revenues: |
|
|
|
|
|
|
|
|
|
|
|
Total revenues |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Costs and expenses: |
|
|
|
|
|
|
|
|
|
|
|
Lease operating expenses |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Production taxes |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Depreciation, depletion and amortization |
|
|
|
|
|
|
|
|
683,000
|
0
|
0
|
Impairment of oil and natural gas properties |
|
|
|
|
|
|
|
|
0
|
|
0
|
General and administrative expenses |
|
|
|
|
|
|
|
|
508,000
|
3,000
|
3,000
|
Restructuring costs |
|
|
|
|
|
|
|
|
0
|
|
|
Accretion expense |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Acquisition expense |
|
|
|
|
|
|
|
|
|
|
0
|
Total costs and expenses |
|
|
|
|
|
|
|
|
1,191,000
|
3,000
|
3,000
|
(LOSS) INCOME FROM OPERATIONS |
|
|
|
|
|
|
|
|
(1,191,000)
|
(3,000)
|
(3,000)
|
OTHER EXPENSE (INCOME): |
|
|
|
|
|
|
|
|
|
|
|
Interest expense |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Interest income |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Gain on debt extinguishment |
|
|
|
|
|
|
|
|
0
|
|
|
Gain on sale of equity method investments |
|
|
|
|
|
|
|
|
|
0
|
0
|
Loss (income) from equity method investments |
|
|
|
|
|
|
|
|
32,710,000
|
510,000
|
2,189,000
|
Other expense (income), net |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Total Other (Income) Expense |
|
|
|
|
|
|
|
|
32,710,000
|
510,000
|
2,189,000
|
(LOSS) INCOME BEFORE INCOME TAXES |
|
|
|
|
|
|
|
|
(33,901,000)
|
(513,000)
|
(2,192,000)
|
Income tax (benefit) expense |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
NET (LOSS) INCOME |
|
|
|
|
|
|
|
|
(33,901,000)
|
(513,000)
|
(2,192,000)
|
Eliminations |
|
|
|
|
|
|
|
|
|
|
|
Revenues: |
|
|
|
|
|
|
|
|
|
|
|
Total revenues |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Costs and expenses: |
|
|
|
|
|
|
|
|
|
|
|
Lease operating expenses |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Production taxes |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Depreciation, depletion and amortization |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Impairment of oil and natural gas properties |
|
|
|
|
|
|
|
|
0
|
|
0
|
General and administrative expenses |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Restructuring costs |
|
|
|
|
|
|
|
|
0
|
|
|
Accretion expense |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Acquisition expense |
|
|
|
|
|
|
|
|
|
|
0
|
Total costs and expenses |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
(LOSS) INCOME FROM OPERATIONS |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
OTHER EXPENSE (INCOME): |
|
|
|
|
|
|
|
|
|
|
|
Interest expense |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Interest income |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Gain on debt extinguishment |
|
|
|
|
|
|
|
|
0
|
|
|
Gain on sale of equity method investments |
|
|
|
|
|
|
|
|
|
0
|
0
|
Loss (income) from equity method investments |
|
|
|
|
|
|
|
|
(1,876,095,000)
|
483,149,000
|
227,243,000
|
Other expense (income), net |
|
|
|
|
|
|
|
|
999,000
|
2,100,000
|
900,000
|
Total Other (Income) Expense |
|
|
|
|
|
|
|
|
(1,875,096,000)
|
485,249,000
|
228,143,000
|
(LOSS) INCOME BEFORE INCOME TAXES |
|
|
|
|
|
|
|
|
1,875,096,000
|
(485,249,000)
|
(228,143,000)
|
Income tax (benefit) expense |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
NET (LOSS) INCOME |
|
|
|
|
|
|
|
|
1,875,096,000
|
(485,249,000)
|
(228,143,000)
|
Oil and Gas |
|
|
|
|
|
|
|
|
|
|
|
Costs and expenses: |
|
|
|
|
|
|
|
|
|
|
|
Midstream gathering and processing expenses |
|
|
|
|
|
|
|
|
291,725,000
|
290,188,000
|
248,995,000
|
Oil and Gas | Parent |
|
|
|
|
|
|
|
|
|
|
|
Costs and expenses: |
|
|
|
|
|
|
|
|
|
|
|
Midstream gathering and processing expenses |
|
|
|
|
|
|
|
|
71,420,000
|
199,607,000
|
187,678,000
|
Oil and Gas | Guarantors |
|
|
|
|
|
|
|
|
|
|
|
Costs and expenses: |
|
|
|
|
|
|
|
|
|
|
|
Midstream gathering and processing expenses |
|
|
|
|
|
|
|
|
220,305,000
|
90,581,000
|
61,317,000
|
Oil and Gas | Non-Guarantor |
|
|
|
|
|
|
|
|
|
|
|
Costs and expenses: |
|
|
|
|
|
|
|
|
|
|
|
Midstream gathering and processing expenses |
|
|
|
|
|
|
|
|
0
|
0
|
0
|
Oil and Gas | Eliminations |
|
|
|
|
|
|
|
|
|
|
|
Costs and expenses: |
|
|
|
|
|
|
|
|
|
|
|
Midstream gathering and processing expenses |
|
|
|
|
|
|
|
|
$ 0
|
$ 0
|
$ 0
|