Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash flows from operating activities:	$ (166,980)	$ (29,808)
Net income (loss)	(166,980)	(29,808)
Adjustments to net income (loss) to reconcile to net cash provided by operating activities:
Net change in fair value of unsettled derivatives	201,825	76,869
Depreciation, depletion and amortization	204,402	125,926
Allowance for uncollectible notes receivable	44,738	0
Impairment of crude oil and natural gas properties	5,171	7,176
Accretion of asset retirement obligation	3,623	3,148
Stock-based compensation	11,126	9,465
Gain (loss) on sale of properties and equipment	176	(228)
Amortization of debt discount and issuance costs	3,077	3,521
Deferred income taxes	(102,319)	(22,630)
Non-cash interest income	(1,194)	(2,247)
Other	(93)	(402)
Changes in assets and liabilities	(5,754)	(24,333)
Net cash from operating activities	197,798	146,457
Cash flows from investing activities:
Capital expenditures	(235,707)	(358,135)
Proceeds from sale of properties and equipment	4,903	243
Net cash from investing activities	(230,804)	(357,892)
Cash flows from financing activities:
Proceeds from revolving credit facility	85,000	272,000
Repayment of revolving credit facility	(122,000)	(275,000)
Redemption of convertible notes	(115,000)	0
Proceeds from sale of common stock, net of issuance costs	296,575	202,851
Other	(3,320)	(3,106)
Net cash from financing activities	141,255	196,745
Net change in cash and cash equivalents	108,249	(14,690)
Cash and cash equivalents, beginning of period	850	16,066
Cash and cash equivalents, end of period	109,099	1,376
Cash payments (receipts) for:
Interest, net of capitalized interest	22,462	22,828
Income taxes	167	9,936
Non-cash investing and financing activities:
Change in accounts payable related to purchases of properties and equipment	(28,999)	(41,490)
Change in asset retirement obligation, with a corresponding change to natural gas and crude oil properties, net of disposals	843	1,395
Purchase of properties and equipment under capital leases	$ 1,074	$ 950