Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidating Financial Information (Condensed Consolidating Statements of Operations) (Details)

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Condensed Consolidating Financial Information (Condensed Consolidating Statements of Operations) (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Revenues        
Total revenues $ 265,498,000 $ 193,692,000 $ 922,455,000 $ 322,494,000
Costs and expenses        
Lease operating expenses 20,020,000 17,471,000 60,044,000 48,789,000
Production taxes 5,419,000 3,525,000 14,464,000 9,492,000
Midstream gathering and processing 69,372,000 45,475,000 176,258,000 122,476,000
Depreciation, depletion and amortization 106,650,000 62,285,000 254,887,000 183,414,000
Impairment of oil and natural gas properties 0 212,194,000 0 601,806,000
General and administrative 13,065,000 10,467,000 37,922,000 32,941,000
Accretion expense 456,000 269,000 1,148,000 777,000
Acquisition expense 33,000 0 2,391,000 0
Total costs and expenses 215,015,000 351,686,000 547,114,000 999,695,000
INCOME (LOSS) FROM OPERATIONS 50,483,000 (157,994,000) 375,341,000 (677,201,000)
OTHER (INCOME) EXPENSE        
Interest expense 27,130,000 12,787,000 74,797,000 44,892,000
Interest income (37,000) (337,000) (927,000) (822,000)
Insurance Proceeds 0 (3,750,000) 0 (3,750,000)
(Income) loss from equity method investments and investments in subsidiaries 2,737,000 (5,997,000) 20,945,000 25,576,000
Other income (345,000) 6,000 (863,000) (3,000)
Total other (income) expense 29,485,000 2,709,000 93,952,000 65,893,000
INCOME (LOSS) BEFORE INCOME TAXES 20,998,000 (160,703,000) 281,389,000 (743,094,000)
INCOME TAX EXPENSE 2,763,000 (3,407,000) 2,763,000 (3,755,000)
NET INCOME (LOSS) 18,235,000 (157,296,000) 278,626,000 (739,339,000)
Reportable Legal Entities | Parent        
Revenues        
Total revenues 188,390,000 193,227,000 710,184,000 321,404,000
Costs and expenses        
Lease operating expenses 16,019,000 17,283,000 49,891,000 48,246,000
Production taxes 4,052,000 3,495,000 10,799,000 9,410,000
Midstream gathering and processing 52,725,000 45,385,000 132,740,000 122,250,000
Depreciation, depletion and amortization 106,649,000 62,284,000 254,884,000 183,411,000
Impairment of oil and natural gas properties   212,194,000   601,806,000
General and administrative 13,956,000 10,772,000 39,882,000 33,230,000
Accretion expense 335,000 269,000 908,000 777,000
Acquisition expense (5,000)   0  
Total costs and expenses 193,731,000 351,682,000 489,104,000 999,130,000
INCOME (LOSS) FROM OPERATIONS (5,341,000) (158,455,000) 221,080,000 (677,726,000)
OTHER (INCOME) EXPENSE        
Interest expense 27,914,000 12,787,000 79,095,000 44,891,000
Interest income (29,000) (337,000) (913,000) (822,000)
Insurance Proceeds   (3,750,000)   (3,750,000)
(Income) loss from equity method investments and investments in subsidiaries (53,880,000) (6,457,000) (136,969,000) 25,044,000
Other income (344,000) 5,000 (1,522,000) 5,000
Total other (income) expense (26,339,000) 2,248,000 (60,309,000) 65,368,000
INCOME (LOSS) BEFORE INCOME TAXES 20,998,000 (160,703,000) 281,389,000 (743,094,000)
INCOME TAX EXPENSE 2,763,000 (3,407,000) 2,763,000 (3,755,000)
NET INCOME (LOSS) 18,235,000 (157,296,000) 278,626,000 (739,339,000)
Reportable Legal Entities | Guarantors        
Revenues        
Total revenues 77,108,000 465,000 212,271,000 1,090,000
Costs and expenses        
Lease operating expenses 4,001,000 188,000 10,153,000 543,000
Production taxes 1,367,000 30,000 3,665,000 82,000
Midstream gathering and processing 16,647,000 90,000 43,518,000 226,000
Depreciation, depletion and amortization 1,000 1,000 3,000 3,000
Impairment of oil and natural gas properties   0   0
General and administrative (892,000) (305,000) (1,963,000) (291,000)
Accretion expense 121,000 0 240,000 0
Acquisition expense 38,000   2,391,000  
Total costs and expenses 21,283,000 4,000 58,007,000 563,000
INCOME (LOSS) FROM OPERATIONS 55,825,000 461,000 154,264,000 527,000
OTHER (INCOME) EXPENSE        
Interest expense (784,000) 0 (4,298,000) 1,000
Interest income (8,000) 0 (14,000) 0
Insurance Proceeds   0   0
(Income) loss from equity method investments and investments in subsidiaries 128,000 (99,000) 2,586,000 (40,000)
Other income (1,000) 1,000 (241,000) (8,000)
Total other (income) expense (665,000) (98,000) (1,967,000) (47,000)
INCOME (LOSS) BEFORE INCOME TAXES 56,490,000 559,000 156,231,000 574,000
INCOME TAX EXPENSE 0 0 0 0
NET INCOME (LOSS) 56,490,000 559,000 156,231,000 574,000
Reportable Legal Entities | Non-Guarantor        
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 0 0 0 0
Depreciation, depletion and amortization 0 0 0
Impairment of oil and natural gas properties   0   0
General and administrative 1,000 0 3,000 2,000
Accretion expense 0 0 0 0
Acquisition expense 0   0  
Total costs and expenses 1,000 0 3,000 2,000
INCOME (LOSS) FROM OPERATIONS (1,000) 0 (3,000) (2,000)
OTHER (INCOME) EXPENSE        
Interest expense 0 0 0 0
Interest income 0 0 0 0
Insurance Proceeds   0   0
(Income) loss from equity method investments and investments in subsidiaries 296,000 364,000 869,000 24,812,000
Other income 0 0 0
Total other (income) expense 296,000 364,000 869,000 24,812,000
INCOME (LOSS) BEFORE INCOME TAXES (297,000) (364,000) (872,000) (24,814,000)
INCOME TAX EXPENSE 0 0 0 0
NET INCOME (LOSS) (297,000) (364,000) (872,000) (24,814,000)
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 0 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 0
Accretion expense 0 0 0 0
Acquisition expense 0   0  
Total costs and expenses 0 0 0 0
INCOME (LOSS) FROM OPERATIONS 0 0 0 0
OTHER (INCOME) EXPENSE        
Interest expense 0 0 0 0
Interest income 0 0 0 0
Insurance Proceeds   0   0
(Income) loss from equity method investments and investments in subsidiaries 56,193,000 195,000 154,459,000 (24,240,000)
Other income 0 900,000 0
Total other (income) expense 56,193,000 195,000 155,359,000 (24,240,000)
INCOME (LOSS) BEFORE INCOME TAXES (56,193,000) (195,000) (155,359,000) 24,240,000
INCOME TAX EXPENSE 0 0 0 0
NET INCOME (LOSS) $ (56,193,000) $ (195,000) $ (155,359,000) $ 24,240,000