Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:	$ (71,530)	$ 17,062
Net income (loss)	(71,530)	17,062
Adjustments to net income (loss) to reconcile to net cash provided by operating activities:
Net change in fair value of unsettled derivatives	55,770	(16,230)
Depreciation, depletion and amortization	97,388	55,820
Allowance for uncollectible notes receivable	44,738	0
Impairment of crude oil and natural gas properties	1,001	2,772
Accretion of asset retirement obligation	1,812	1,560
Stock-based compensation	4,682	4,368
Gain (loss) on sale of properties and equipment	(84)	(21)
Amortization of debt discount and issuance costs	1,754	1,751
Deferred income taxes	(43,372)	8,534
Non-cash interest income	(1,194)	(1,112)
Other	(8)	(568)
Changes in assets and liabilities	10,193	7,941
Net cash from operating activities	101,150	81,877
Cash flows from investing activities:
Capital expenditures	(122,759)	(176,111)
Proceeds from sale of properties and equipment	90	24
Net cash from investing activities	(122,669)	(176,087)
Cash flows from financing activities:
Proceeds from revolving credit facility	85,000	165,000
Repayment of revolving credit facility	(122,000)	(221,000)
Proceeds from sale of common stock, net of issuance costs	296,578	202,851
Other	(364)	(1,213)
Net cash from financing activities	259,214	145,638
Net change in cash and cash equivalents	237,695	51,428
Cash and cash equivalents, beginning of period	850	16,066
Cash and cash equivalents, end of period	238,545	67,494
Cash payments (receipts) for:
Interest, net of capitalized interest	599	569
Income taxes	0	8,088
Non-cash investing and financing activities:
Change in accounts payable related to purchases of properties and equipment	(23,544)	(35,836)
Change in asset retirement obligation, with a corresponding change to natural gas and crude oil properties, net of disposals	404	302
Purchase of properties and equipment under capital leases	$ 635	$ 472