Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities:
Net (loss) income	$ (1,925,341)	$ 30,981
Adjustments to reconcile net loss to net cash provided by operating activities:
Depletion, depreciation and amortization	152,617	142,995
Impairments	1,306,757	1,659
Gain on sale of assets		(1,375)
Accretion expense	1,439	668
Accrued interest expense and unamortized debt discount	16,817	(5,945)
Amortization of deferred financing costs	16,154	8,624
Non-cash loss (gain) on derivative instruments	62,790	(6,033)
Amortization of option premiums	(4,645)	(9,774)
Amortization of prepaid expenses	4,907	2,697
Non-cash stock based compensation	1,374
Other, net	1,060	(72)
Reorganization items, net	431,459
Working capital and other changes:
(Increase) decrease in accounts receivable	67,633	(25,084)
(Increase) decrease in other assets	12,901	(3,687)
Decrease in accounts payable, royalties payable and accrued liabilities	(7,845)	(7,405)
Net cash provided by operating activities	138,077	128,249
Cash flows from investing activities:
Oil and gas property additions	(289,718)	(431,494)
Oil and gas property acquisitions		(36,772)
Gas processing equipment additions	(1,668)	(2,881)
Other asset additions	(1,784)	(2,122)
Cash received from sale of assets	6,449	15,127
Net cash used by investing activities	(286,721)	(458,142)
Cash flows from financing activities:
Borrowings under senior secured revolving credit facility	425,987	364,000
Debt repayments for the senior secured revolving credit facility	(24,324)	(40,000)
Debt issuance costs	(1,110)	(154)
Shares repurchased	(188)
Net cash provided by financing activities	400,365	323,846
Net increase (decrease) in cash and cash equivalents	251,721	(6,047)
Cash and cash equivalents, beginning of period	3,252	11,821
Cash and cash equivalents, end of period	$ 254,973	$ 5,774