Supplemental Oil & Natural Gas Data (Unaudited) Costs incurred (Details) (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
Property acquisition costs:
Proved	$ 0		$ 478,311
Unproved	0		0
Exploration costs	0		148
Development costs	22,266		555,629
Asset retirement costs	0		6,064
Total costs incurred (1)	22,266	[1]	1,040,152	[1]
Capitalized interest	41		6,000
Oil and natural gas:
Proved properties	3,397,785		4,025,595
Unproved properties	1,415,874		846,464
Capitalized Costs, Oil and Gas Producing Activities, Gross	4,813,659		4,872,059
Less accumulated depletion and amortization	(10,394)		(525,007)
Capitalized costs, Oil and natural gas properties, net	4,803,265		4,347,052
Predecessor
Property acquisition costs:
Proved					3,457		70,700
Unproved					463		10,686
Exploration costs					868		16,405
Development costs					577,568		696,095
Asset retirement costs					15,998		18,248
Total costs incurred (1)					598,354	[1]	812,134	[1]
Capitalized interest					$ 6,000		$ 18,000

[1] The total above does not reflect approximately $6 million, $41,000, $6 million and $18 million of capitalized interest incurred for the year ended December 31, 2014, for the periods from December 17, 2013 through December 31, 2013, and January 1, 2013 through December 16, 2013, and for the year ended December 31, 2012, respectively.