Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Cash flows from operating activities:
Net income (loss)	$ 23,683	$ (35,500)
Adjustments to net loss to reconcile to net cash provided by operating activities:
Net change in fair value of unsettled derivatives	(34,323)	32,057
Depreciation, depletion and amortization	151,293	88,877
Impairment of crude oil and natural gas properties	4,054	52,436
Accretion of asset retirement obligation	2,582	3,667
Stock-based compensation	13,111	9,991
Loss on sale of properties and equipment	384	1,571
Amortization of debt discount and issuance costs	5,206	5,093
Deferred income taxes	14,981	(21,714)
Other	(759)	(1,017)
Changes in assets and liabilities	21,753	(15,918)
Net cash from operating activities	201,965	119,543
Cash flows from investing activities:
Capital expenditures	(451,081)	(256,096)
Proceeds from acquisition adjustments	0	7,579
Proceeds from sale of properties and equipment	1,587	178,987
Net cash from investing activities	(449,494)	(69,530)
Cash flows from financing activities:
Proceeds from revolving credit facility	136,750	252,500
Repayment of revolving credit facility	(61,000)	(278,000)
Proceeds from sale of common stock, net of issuance costs	0	275,847
Other	(2,726)	(4,329)
Net cash from financing activities	73,024	246,018
Net change in cash and cash equivalents	(174,505)	296,031
Cash and cash equivalents, beginning of period	193,243	2,457
Cash and cash equivalents, end of period	18,738
Cash payments (receipts) for:
Interest, net of capitalized interest	24,933	26,408
Income taxes	1,800	525
Non-cash investing activities:
Change in accounts payable related to purchases of properties and equipment	19,320	24,308
Change in asset retirement obligation, with a corresponding change to natural gas and crude oil properties, net of disposals	500	337
Change in accounts payable related to disposition of properties and equipment	$ 0	$ (231)