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Condensed Consolidated Statement of Operations (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Revenues    
Oil and gas revenues $ 237,252 $ 117,315
Bulk oil sales 27,631 0
Midstream revenues 14,606 6,983
Well services revenues 5,627 5,985
Total revenues 285,116 130,283
Operating expenses    
Lease operating expenses 43,872 31,064
Midstream operating expenses 3,327 1,738
Well services operating expenses 3,902 2,651
Marketing, transportation and gathering expenses 10,951 8,552
Bulk oil purchases 28,002 0
Production taxes 20,299 10,753
Depreciation, depletion and amortization 126,666 122,449
Exploration expenses 1,489 363
Impairment 2,682 3,562
General and administrative expenses 23,834 24,366
Total operating expenses 265,024 205,498
Operating income (loss) 20,092 (75,215)
Other income (expense)    
Net gain on derivative instruments 56,075 14,375
Interest expense, net of capitalized interest (36,321) (38,739)
Gain on extinguishment of debt 0 7,016
Other income 16 479
Total other income (expense) 19,770 (16,869)
Income (loss) before income taxes 39,862 (92,084)
Income tax benefit (expense) (16,037) 27,629
Net income (loss) $ 23,825 $ (64,455)
Earnings (loss) per share:    
Basic (in dollars per share) $ 0.10 $ (0.40)
Diluted (in dollars per share) $ 0.10 $ (0.40)
Weighted average shares outstanding:    
Basic (in shares) 233,068 162,922
Diluted (in shares) 237,900 162,922