Derivative Instruments (Details) (USD $)	12 Months Ended	0 Months Ended	3 Months Ended				12 Months Ended	3 Months Ended				12 Months Ended
	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2014 MBbl	Dec. 16, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 16, 2013
Derivative Asset [Abstract]
Commodity derivatives		$ 28,291,000	$ 60,843,000				$ 60,843,000
Derivative Liability [Abstract]
Commodity derivatives		45,226,000	17,149,000				17,149,000
Oil, natural gas and NGL sales | Commodity contract
Derivative Liability [Abstract]
Amortization of AOCL into earnings	11,000,000
Interest expense | Interest rate contract
Derivative Liability [Abstract]
Amortization of AOCL into earnings	2,000,000
Successor
Derivative Asset [Abstract]
Commodity derivatives			60,843,000				60,843,000
Derivative Liability [Abstract]
Commodity derivatives			17,149,000				17,149,000
Cash settlements on canceled derivatives		0	12,281,000				12,281,000
Derivative, Nonmonetary Notional Amount, Volume							9,125
Maximum loss upon all counterparties failing to perform							61,000,000
Gains (losses) on oil and natural gas derivatives		(5,049,000)	55,891,000	44,990,000	(25,562,000)	3,465,000	78,784,000
Cash settlements on derivatives inclusive of canceled derivatives							19,000,000
Average contract price on oil settled derivatives per unit							92.16
Predecessor
Derivative Asset [Abstract]
Commodity derivatives		28,291,000
Derivative Liability [Abstract]
Commodity derivatives		45,226,000
Cash settlements on canceled derivatives	14,659,000											0
Gains (losses) on oil and natural gas derivatives	64,620,000							(24,303,000)	(45,293,000)	35,622,000	(737,000)	(34,711,000)
Cash settlements on derivatives inclusive of canceled derivatives	$ 20,000,000											$ 182,000