Statements of Cash Flows (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
Cash flow from operating activities:
Net income (loss)	$ (19,973)	$ 22,596
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, depletion and amortization	10,845	302,353
Impairment of long-lived assets	0	253,362
Stock-based compensation expense	0	0
Loss on extinguishment of debt	0	0
Amortization and write-off of deferred financing fees	(615)	(4,913)
Change in book overdraft	0	0
Losses on sale of assets and other, net	0	111,374
Deferred income taxes	0	69
Derivatives activities:
Total (gains) losses	5,049	(78,784)
Cash settlements	0	6,738
Cash settlements on canceled derivatives	0	12,281
Amortization of accumulated other comprehensive loss	0	0
Changes in assets and liabilities:
(Increase) decrease in accounts receivable – trade, net	71,434	16,483
(Increase) decrease in other assets	10,613	(15,949)
Increase (decrease) in accounts payable and accrued expenses	(8,078)	(3,719)
Increase (decrease) in other liabilities	(12,597)	(38,411)
Net cash provided by operating activities	56,678	583,480
Cash flow from investing activities:
Property acquisitions	0	0
Development of oil and natural gas properties	(17,478)	(523,889)
Proceeds from sale of properties and equipment and other	0	7,667
Net cash used in investing activities	(17,478)	(516,222)
Cash flow from financing activities:
Proceeds from borrowings	0	0
Repayments of debt	0	(206,124)
Dividends paid	(4,272)	0
Financing fees and other, net	0	(11,510)
Proceeds from stock option exercises	0	0
Capital contribution from affiliate	0	220,000
Distributions to affiliate	(435,000)	(119,079)
Excess tax benefit from stock-based compensation	0	0
Net cash provided by (used in) financing activities	(439,272)	(116,713)
Net increase (decrease) in cash and cash equivalents	(400,072)	(49,455)
Cash and cash equivalents:
Beginning	451,113	51,041
Ending	51,041	1,586
Predecessor
Cash flow from operating activities:
Net income (loss)			93,447	171,539
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, depletion and amortization			279,757	227,700
Impairment of long-lived assets			0	0
Stock-based compensation expense			12,576	9,819
Loss on extinguishment of debt			0	6,842
Amortization and write-off of deferred financing fees			6,685	7,031
Change in book overdraft			(14,885)	(1,220)
Losses on sale of assets and other, net			14,907	12,028
Deferred income taxes			76,644	82,881
Derivatives activities:
Total (gains) losses			34,711	(64,620)
Cash settlements			182	4,927
Cash settlements on canceled derivatives			0	14,659
Amortization of accumulated other comprehensive loss			0	8,899
Changes in assets and liabilities:
(Increase) decrease in accounts receivable – trade, net			(97,653)	(6,740)
(Increase) decrease in other assets			996	(6,203)
Increase (decrease) in accounts payable and accrued expenses			28,187	23,507
Increase (decrease) in other liabilities			7,414	10,390
Net cash provided by operating activities			442,968	501,439
Cash flow from investing activities:
Property acquisitions			(3,933)	(78,313)
Development of oil and natural gas properties			(594,579)	(693,866)
Proceeds from sale of properties and equipment and other			11,530	14,007
Net cash used in investing activities			(586,982)	(758,172)
Cash flow from financing activities:
Proceeds from borrowings			1,225,475	2,067,200
Repayments of debt			(615,200)	(1,785,799)
Dividends paid			(13,204)	(17,549)
Financing fees and other, net			(459)	(11,841)
Proceeds from stock option exercises			730	3,687
Capital contribution from affiliate			0	0
Distributions to affiliate			0	0
Excess tax benefit from stock-based compensation			2,345	1,049
Net cash provided by (used in) financing activities			599,687	256,747
Net increase (decrease) in cash and cash equivalents			455,673	14
Cash and cash equivalents:
Beginning			312	298
Ending			$ 455,985	$ 312