Consolidated statements of operations - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2017
Mar. 21, 2017
Mar. 31, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Revenues - commodity sales $ 7,808          
Costs and expenses:            
Lease operating 4,259          
Transportation and processing 361          
Production taxes 316          
Depreciation, depletion and amortization 3,414          
Loss on impairment of oil and gas assets 0          
General and administrative 5,744          
Liability management 0          
Cost reduction initiatives 6          
Total costs and expenses 14,100          
Operating (loss) income (6,292)          
Non-operating (expense) income:            
Interest expense (650)          
Derivative (losses) gains (12,115)          
Write-off of Senior Note issuance costs, discount and premium 0   $ (16,970)      
Other (expense) income, net (5)          
Net non-operating (expense) income (12,770)          
Reorganization items, net (620)          
(Loss) income before income taxes (19,682)          
Income tax (benefit) expense 1          
Net (loss) income $ (19,683)          
Predecessor            
Revenues - commodity sales   $ 66,531 48,239 $ 252,152 $ 324,315 $ 681,557
Costs and expenses:            
Lease operating   19,941 23,415 90,533 110,659 141,608
Transportation and processing   2,034 1,879 8,845 8,541 8,295
Production taxes   2,417 1,756 9,610 9,953 28,305
Depreciation, depletion and amortization   24,915 31,808 122,928 216,574 245,908
Loss on impairment of oil and gas assets   0 77,896 281,079 1,491,129 0
Loss on impairment of other assets       1,393 16,207 0
General and administrative   6,843 6,489 20,953 39,089 53,414
Liability management   0 5,589 9,396 0 0
Cost reduction initiatives   629 3,125 2,879 10,028 0
Total costs and expenses   56,779 151,957 547,616 1,902,180 477,530
Operating (loss) income   9,752 (103,718) (295,464) (1,577,865) 204,027
Non-operating (expense) income:            
Interest expense   (5,862) (29,654) (64,242) (112,400) (104,241)
Gain on extinguishment of debt       0 31,590 0
Derivative (losses) gains   48,006 11,932 (22,837) 145,288 231,320
Write-off of Senior Note issuance costs, discount and premium   0 (16,970) (16,970) 0 0
Other (expense) income, net   1,373 136 411 2,324 2,630
Net non-operating (expense) income   43,517 (34,556) (103,638) 66,802 129,709
Reorganization items, net   988,727 0 (16,720) 0 0
(Loss) income before income taxes   1,041,996 (138,274) (415,822) (1,511,063) 333,736
Income tax (benefit) expense   37 132 (102) (177,219) 124,443
Net (loss) income   $ 1,041,959 $ (138,406) $ (415,720) $ (1,333,844) $ 209,293