Derivative Instruments (Details 2) (USD $)	3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2014 Successor MBbl	Jun. 30, 2014 Successor MBbl	Jun. 30, 2013 Predecessor	Jun. 30, 2013 Predecessor
Derivative
Volume of oil on settled derivatives (MBbls)	2,275	4,525
Average contract price on oil settled derivatives per unit ($/Bbl)	92.16	92.16
Maximum loss if all counterparties fail		$ 17,000,000
Gains (losses) on oil and natural gas derivatives	(25,562,000)	(22,097,000)	35,622,000	34,885,000
Cash settlements	$ (8,082,000)	$ (10,472,000)	$ 2,435,000	$ 4,844,000