CONSOLIDATED AND COMBINED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net (loss) income	$ (73,031)	$ 56,722	$ 27,510
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	178,281	94,297	28,152
Exploration costs	7,310	742
Impairment	950
Inventory write down	4,147
Accretion of asset retirement obligations	826	512	181
(Gain) loss on sale of oil and natural gas properties	32,404	2,097	(36)
Loss on sale of other property and equipment	1,970
Amortization and write off of deferred loan origination costs	2,702	2,327	1,225
Amortization of bond premium	(764)	(574)
Interest not paid in cash		234	2,597
Income tax (benefit) expense	(23,755)	36,468	1,906
Stock based compensation expense	8,133	53,297	1,233
Derivative (income) loss	(60,818)	(83,858)	9,800
Net cash received (paid) for derivative settlements	43,767	3,311	(198)
Net cash received (paid) for option premiums	40,656	193	(16,342)
Net premiums received (paid) on options that settled during the period	11,406	(2,308)	(6,928)
Changes in operating assets and liabilities, net of acquisitions:
Restricted cash	(1,139)
Accounts receivable	24,103	45,372	(77,086)
Accounts receivable—related parties	3,675	(3,055)	(621)
Materials and supplies	3,767	(689)	(867)
Other current assets	(22,793)	2,229	6,118
Other noncurrent assets	(588)	(535)	(184)
Accounts payable and accrued expenses	(7,287)	(32,121)	57,532
Revenue and severance taxes payable	(1,257)	9,947	19,243
Other noncurrent liabilities	(375)	375
Net cash provided by operating activities	172,290	184,983	53,235
CASH FLOWS FROM INVESTING ACTIVITIES:
Development of oil and natural gas properties	(382,550)	(477,681)	(209,859)
Acquisitions of oil and natural gas properties	(73,807)	(762,244)	(208,381)
Acquisition of Pacesetter	(2,408)
Additions to other property and equipment	(19,755)	(7,924)	(8,121)
Proceeds from sale of oil and natural gas properties	50,138	172	750
Proceeds from sale of other property and equipment	1,217
Net cash used in investing activities	(427,165)	(1,247,677)	(425,611)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings under long-term debt	105,000	946,140	561,218
Payments on long-term debt	(225,794)	(700,766)	(254,100)
Debt issue costs	(1,138)	(12,547)	(2,294)
Proceeds from issuance of common stock, net	669,418	867,750
Purchases of restricted stock	(71)
Vesting of restricted stock	(6)
Payment of Preferred Return		(6,726)
Proceeds from issuance of LLC interests			73,540
Equity issue costs			(268)
Net cash provided by financing activities	547,409	1,093,851	378,096
Net increase in cash and cash equivalents	292,534	31,157	5,720
Cash and cash equivalents at beginning of year	50,550	19,393	13,673
Cash and cash equivalents at end of year	343,084	50,550	19,393
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid for interest	43,993	27,252	13,555
SUPPLEMENTAL DISCLOSURE OF NON-CASH ACTIVITIES:
Asset retirement obligations incurred, including changes in estimate	3,441	7,498	6,238
Additions to oil and natural gas properties - change in capital accruals	18,300	13,658	$ 58,540
Additions to other property and equipment funded by capital lease borrowings	$ 939	$ 2,263