Statements of Operations (USD $) In Thousands, unless otherwise specified	0 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2014	Dec. 16, 2013	Dec. 31, 2012
Successor
Revenues and other:
Oil, natural gas and natural gas liquids sales	$ 50,324	$ 1,298,402
Electricity sales	1,444	40,022
Gains (losses) on oil and natural gas derivatives	(5,049)	78,784
Marketing revenues	399	10,889
Other revenues	0	3,192
Total revenues and other	47,118	1,431,289
Expenses:
Lease operating expenses	15,410	364,540
Electricity generation expenses	1,257	28,171
Transportation expenses	2,576	41,842
Marketing expenses	376	8,084
General and administrative expenses	20,298	102,787
Exploration costs	0	0
Depreciation, depletion and amortization	10,845	302,353
Impairment of long-lived assets	0	253,362
Taxes, other than income taxes	2,130	97,708
(Gains) losses on sale of assets and other, net	10,208	120,786
Total expenses	63,100	1,319,633
Other income and (expenses)
Interest expense, net of amounts capitalized	(3,963)	(87,948)
Loss on extinguishment of debt	0	0
Other, net	(28)	(1,043)
Total other income and (expenses)	(3,991)	(88,991)
Income (loss) before income taxes	(19,973)	22,665
Income tax expense	0	69
Net income (loss)	(19,973)	22,596
Predecessor
Revenues and other:
Oil, natural gas and natural gas liquids sales			1,103,245	937,261
Electricity sales			33,992	29,940
Gains (losses) on oil and natural gas derivatives			(34,711)	64,620
Marketing revenues			7,827	7,631
Other revenues			949	1,674
Total revenues and other			1,111,302	1,041,126
Expenses:
Lease operating expenses			295,811	232,266
Electricity generation expenses			22,485	19,975
Transportation expenses			46,774	39,531
Marketing expenses			7,593	6,873
General and administrative expenses			122,991	71,564
Exploration costs			24,048	21,010
Depreciation, depletion and amortization			279,757	227,700
Impairment of long-lived assets			0	0
Taxes, other than income taxes			57,063	39,757
(Gains) losses on sale of assets and other, net			(23)	(1,782)
Total expenses			856,499	656,894
Other income and (expenses)
Interest expense, net of amounts capitalized			(96,127)	(83,136)
Loss on extinguishment of debt			0	(41,545)
Other, net			51	109
Total other income and (expenses)			(96,076)	(124,572)
Income (loss) before income taxes			158,727	259,660
Income tax expense			65,280	88,121
Net income (loss)			$ 93,447	$ 171,539