Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities:	$ (71,302)	$ 23,683
Net income (loss)	(71,302)	23,683
Adjustments to net income (loss) to reconcile to net cash provided by operating activities:
Net change in fair value of unsettled derivatives	21,322	(34,323)
Depreciation, depletion and amortization	206,873	151,293
Impairment of crude oil and natural gas properties	158,792	4,054
Accretion of asset retirement obligation	4,742	2,582
Stock-based compensation	14,278	13,111
Gain (loss) on sale of properties and equipment	(302)	384
Amortization of debt discount and issuance costs	5,308	5,206
Deferred income taxes	(44,770)	14,981
Non-cash interest income	(3,624)	0
Other	2,241	(759)
Changes in assets and liabilities	(10,552)	21,753
Net cash from operating activities	283,006	201,965
Cash flows from investing activities:
Capital expenditures	(489,036)	(451,081)
Proceeds from sale of properties and equipment	319	1,587
Net cash from investing activities	(488,717)	(449,494)
Cash flows from financing activities:
Proceeds from revolving credit facility	325,000	136,750
Repayment of revolving credit facility	(331,000)	(61,000)
Proceeds from sale of common stock, net of issuance costs	202,851	0
Other	(3,516)	(2,726)
Net cash from financing activities	193,335	73,024
Net change in cash and cash equivalents	(12,376)	(174,505)
Cash and cash equivalents, beginning of period	16,066	193,243
Cash and cash equivalents, end of period	3,690	18,738
Cash payments (receipts) for:
Interest, net of capitalized interest	23,467	24,933
Income taxes	9,936	1,800
Non-cash investing and financing activities:
Change in accounts payable related to purchases of properties and equipment	(68,529)	19,320
Change in asset retirement obligation, with a corresponding change to natural gas and crude oil properties, net of disposals	1,642	500
Purchase of properties and equipment under capital leases	$ 1,479	$ 0