Supplemental Quarterly Data (Unaudited) (Details) - Successor - USD ($) $ in Thousands				3 Months Ended								12 Months Ended
		Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Selected Quarterly Financial Data
Oil, natural gas and natural gas liquids sales			$ 50,324	$ 104,812	$ 140,252	$ 173,381	$ 156,586	$ 254,043	$ 350,863	$ 360,380	$ 333,116	$ 575,031	$ 1,298,402
Electricity sales			1,444	4,174	8,610	6,609	5,151	8,561	11,300	10,192	9,969	24,544	40,022
Gains (losses) on oil and natural gas derivatives			(5,049)	2,718	27,664	(4,474)	3,267	55,891	44,990	(25,562)	3,465	36,068	78,784
Total revenues and other			47,118	115,176	179,307	177,890	169,281	323,232	409,416	347,261	351,380	641,654	1,431,289
Total expenses	[1]			218,155	696,633	191,222	474,938	488,741	225,834	240,116	244,156
(Gains) losses on sale of assets and other, net			10,208	732	2,633	(811)	(4,473)	64,151	49,011	4,257	3,367	(1,919)	120,786
Net income (loss)		$ (19,973)	$ (19,973)	$ (126,462)	$ (537,158)	$ (28,832)	$ (322,725)	$ (251,275)	$ 115,165	$ 79,008	$ 79,698	$ (1,015,177)	$ 22,596

[1] Includes the following expenses: lease operating, transportation, marketing, general and administrative, exploration, depreciation, depletion and amortization, impairment of long-lived assets and taxes, other than income taxes.