Derivative Instruments Derivative Instruments Income Statement Location (Details) - USD ($) $ in Thousands			3 Months Ended								12 Months Ended
		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	Dec. 16, 2013
Successor
Derivative [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net		$ (5,049)	$ 2,718	$ 27,664	$ (4,474)	$ 3,267	$ 55,891	$ 44,990	$ (25,562)	$ 3,465	$ 36,068	$ 78,784
Predecessor
Derivative [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net													$ (34,711)
Gains (losses) on oil and natural gas derivatives | Successor
Derivative [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net		(5,049)									29,175	78,784
Gains (losses) on oil and natural gas derivatives | Predecessor
Derivative [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net													(34,711)
Lease operating expenses (1) | Successor
Derivative [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	[1]	$ 0									$ 6,893	$ 0
Lease operating expenses (1) | Predecessor
Derivative [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	[1]												$ 0

[1] Consists of gains and (losses) on derivatives used to hedge exposure to differentials in consuming areas, which were entered into in March 2015.