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Condensed Consolidating Financial Information - Schedule of Condensed Consolidating Statement of Operations (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Revenues    
Oil and gas revenues $ 117,315 $ 173,859
Well services and midstream revenues 12,968 6,528
Total revenues 130,283 180,387
Operating expenses    
Lease operating expenses 31,064 39,125
Well services and midstream operating expenses 4,389 1,952
Marketing, transportation and gathering expenses 8,552 7,278
Production taxes 10,753 16,621
Depreciation, depletion and amortization 122,449 118,478
Exploration expenses 363 843
Rig termination 0 1,080
Impairment 3,562 5,321
General and administrative expenses 24,366 23,324
Total operating expenses 205,498 214,022
Operating loss (75,215) (33,635)
Other income (expense)    
Equity in earnings (loss) of subsidiaries 0 0
Net gain on derivative instruments 14,375 47,072
Interest expense, net of capitalized interest (38,739) (38,784)
Gain on extinguishment of debt 7,016 0
Other income (expense) 479 (70)
Total other income (expense) (16,869) 8,218
Loss before income taxes (92,084) (25,417)
Income tax benefit (expense) 27,629 7,376
Net loss (64,455) (18,041)
Parent/Issuer [Member]    
Revenues    
Oil and gas revenues 0 0
Well services and midstream revenues 0 0
Total revenues 0 0
Operating expenses    
Lease operating expenses 0 0
Well services and midstream operating expenses 0 0
Marketing, transportation and gathering expenses 0 0
Production taxes 0 0
Depreciation, depletion and amortization 0 0
Exploration expenses 0 0
Rig termination   0
Impairment 0 0
General and administrative expenses 7,451 8,619
Total operating expenses 7,451 8,619
Operating loss (7,451) (8,619)
Other income (expense)    
Equity in earnings (loss) of subsidiaries (37,327) 12,619
Net gain on derivative instruments 0 0
Interest expense, net of capitalized interest (34,832) (35,221)
Gain on extinguishment of debt 7,016  
Other income (expense) 43 (1)
Total other income (expense) (65,100) (22,603)
Loss before income taxes (72,551) (31,222)
Income tax benefit (expense) 8,096 13,181
Net loss (64,455) (18,041)
Combined Guarantor Subsidiaries [Member]    
Revenues    
Oil and gas revenues 117,315 173,859
Well services and midstream revenues 12,968 6,528
Total revenues 130,283 180,387
Operating expenses    
Lease operating expenses 31,064 39,125
Well services and midstream operating expenses 4,389 1,952
Marketing, transportation and gathering expenses 8,552 7,278
Production taxes 10,753 16,621
Depreciation, depletion and amortization 122,449 118,478
Exploration expenses 363 843
Rig termination   1,080
Impairment 3,562 5,321
General and administrative expenses 16,915 14,705
Total operating expenses 198,047 205,403
Operating loss (67,764) (25,016)
Other income (expense)    
Equity in earnings (loss) of subsidiaries 0 0
Net gain on derivative instruments 14,375 47,072
Interest expense, net of capitalized interest (3,907) (3,563)
Gain on extinguishment of debt 0  
Other income (expense) 436 (69)
Total other income (expense) 10,904 43,440
Loss before income taxes (56,860) 18,424
Income tax benefit (expense) 19,533 (5,805)
Net loss (37,327) 12,619
Intercompany Eliminations [Member]    
Revenues    
Oil and gas revenues 0 0
Well services and midstream revenues 0 0
Total revenues 0 0
Operating expenses    
Lease operating expenses 0 0
Well services and midstream operating expenses 0 0
Marketing, transportation and gathering expenses 0 0
Production taxes 0 0
Depreciation, depletion and amortization 0 0
Exploration expenses 0 0
Rig termination   0
Impairment 0 0
General and administrative expenses 0 0
Total operating expenses 0 0
Operating loss 0 0
Other income (expense)    
Equity in earnings (loss) of subsidiaries 37,327 (12,619)
Net gain on derivative instruments 0 0
Interest expense, net of capitalized interest 0 0
Gain on extinguishment of debt 0  
Other income (expense) 0 0
Total other income (expense) 37,327 (12,619)
Loss before income taxes 37,327 (12,619)
Income tax benefit (expense) 0 0
Net loss $ 37,327 $ (12,619)