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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
shares in Thousands, $ in Thousands
 4 Months Ended 8 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 09, 2016
Dec. 31, 2018
Dec. 31, 2017
Oil, natural gas and natural gas liquids sales:        
Other $ 802   $ 1,080 $ 2,128
Total operating revenues 153,362   226,609 377,965
Production:        
Lease operating 22,382   25,075 61,743
Workover and other 10,510   8,574 21,739
Taxes other than income 12,364   12,787 30,757
Gathering and other 14,677   60,090 40,783
Restructuring     128 7,535
General and administrative 41,395   62,056 111,351
Depletion, depreciation and accretion 46,899   77,527 110,207
Full cost ceiling impairment 420,934      
(Gain) loss on sale of oil and natural gas properties     7,235 (721,573)
Gain on sale of oil and natural gas assets     (119,003)  
Total operating expenses 569,161   134,469 (337,458)
Income (loss) from operations (415,799)   92,140 715,423
Other income (expenses):        
Net gain (loss) on derivative contracts (27,740)   92,625 1,291
Interest expense and other, net (28,861)   (43,015) (71,097)
Reorganization items (2,049)      
Gain (loss) on extinguishment of debt       (114,931)
Total other income (expenses) (58,650)   49,610 (184,737)
Income (loss) before income taxes (474,449)   141,750 530,686
Income tax benefit (provision) (4,744)   (95,791) 5,000
Net income (loss) (479,193)   45,959 535,686
Non-cash preferred dividend       (48,007)
Preferred dividends and accretion on redeemable noncontrolling interest (791)      
Net income (loss) available to common stockholders $ (479,984)   $ 45,959 $ 487,679
Net income (loss) per share of common stock:        
Basic (in dollars per share) $ (5.26)   $ 0.29 $ 3.67
Diluted (in dollars per share) $ (5.26)   $ 0.29 $ 3.65
Weighted average common shares outstanding:        
Basic (in shares) 91,228   157,011 132,763
Diluted (in shares) 91,228   157,295 133,576
Total oil, natural gas and natural gas liquids sales        
Oil, natural gas and natural gas liquids sales:        
Total oil, natural gas and natural gas liquids sales $ 152,560   $ 225,529 $ 375,837
Oil        
Oil, natural gas and natural gas liquids sales:        
Total oil, natural gas and natural gas liquids sales 139,786   199,601 340,674
Natural gas        
Oil, natural gas and natural gas liquids sales:        
Total oil, natural gas and natural gas liquids sales 6,756   6,791 16,194
Natural gas liquids        
Oil, natural gas and natural gas liquids sales:        
Total oil, natural gas and natural gas liquids sales $ 6,018   $ 19,137 $ 18,969
Predecessor        
Oil, natural gas and natural gas liquids sales:        
Other   $ 1,339    
Total operating revenues   266,843    
Production:        
Lease operating   50,032    
Workover and other   22,507    
Taxes other than income   24,453    
Gathering and other   29,279    
Restructuring   5,168    
General and administrative   83,641    
Depletion, depreciation and accretion   120,555    
Full cost ceiling impairment   754,769    
Other operating property and equipment impairment   28,056    
Total operating expenses   1,118,460    
Income (loss) from operations   (851,617)    
Other income (expenses):        
Net gain (loss) on derivative contracts   (17,998)    
Interest expense and other, net   (122,249)    
Reorganization items   913,722    
Gain (loss) on extinguishment of debt   81,434    
Total other income (expenses)   854,909    
Income (loss) before income taxes   3,292    
Income tax benefit (provision)   8,666    
Net income (loss)   11,958    
Series A preferred dividends   8,847    
Preferred dividends and accretion on redeemable noncontrolling interest   (35,905)    
Net income (loss) available to common stockholders   $ (32,794)    
Net income (loss) per share of common stock:        
Basic (in dollars per share)   $ (0.27)    
Diluted (in dollars per share)   $ (0.27)    
Weighted average common shares outstanding:        
Basic (in shares)   120,513    
Diluted (in shares)   120,513    
Predecessor | Total oil, natural gas and natural gas liquids sales        
Oil, natural gas and natural gas liquids sales:        
Total oil, natural gas and natural gas liquids sales   $ 265,504    
Predecessor | Oil        
Oil, natural gas and natural gas liquids sales:        
Total oil, natural gas and natural gas liquids sales   248,064    
Predecessor | Natural gas        
Oil, natural gas and natural gas liquids sales:        
Total oil, natural gas and natural gas liquids sales   9,511    
Predecessor | Natural gas liquids        
Oil, natural gas and natural gas liquids sales:        
Total oil, natural gas and natural gas liquids sales   $ 7,929