Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net loss	$ (135,082)	$ (284,031)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depletion, depreciation and amortization	19,979	54,063
Impairments	86,298	236,485
Accretion expense	545	474
Non-cash interest expense	2	20,249
Amortization of deferred financing costs		6,044
Non-cash gain on derivative instruments		11,004
Amortization of option premiums		(1,145)
Amortization of prepaid expenses	1,577	1,503
Non-cash stock based compensation	583	417
Other, net	(65)	557
Working capital and other changes:
Decrease in accounts receivable	12,391	36,964
Increase in other assets	(2,301)	(2,840)
Decrease in liabilities	(8,703)	(37,573)
Net cash (used in) / provided by operating activities	(24,776)	42,171
Cash flows from investing activities:
Oil and natural gas property additions	(13,335)	(164,211)
Gas processing equipment additions	(1)	(457)
Other asset additions	(164)	(742)
Cash received from sale of assets	20	660
Net cash used in investing activities	(13,480)	(164,750)
Cash flows from financing activities:
Borrowings under senior secured revolving credit facility		425,987
Debt issuance costs		(870)
Shares repurchased	(2)	(174)
Net cash provided by (used in) financing activities	(2)	424,943
Net increase (decrease) in cash and cash equivalents	(38,258)	302,364
Cash and cash equivalents, beginning of period	208,637	3,252
Cash and cash equivalents, end of period	170,379	$ 305,616
Supplemental cash flow information
Cash paid for reorganization items	$ 21,700