CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 94,084	$ (53,179)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, depletion and amortization	152,285	105,372
Accretion of asset retirement obligations	329	385
Loss on sale of property	0	119
Loss on early extinguishment of debt	3,891	0
Amortization and write off of deferred loan origination costs	1,803	1,385
Amortization of bond premium	(258)	(383)
Stock-based compensation	9,460	6,150
Deferred income tax expense (benefit)	30,476	(20,486)
Change in TRA liability	20,549	0
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	68,130	(25,216)
Net cash received for derivative settlements	2,115	25,133
Net cash (paid) received for option premiums	(13,281)	7,014
Net premiums (paid) received on options that settled during the period	(9,917)	20,965
Other	261	5,677
Changes in operating assets and liabilities, net of acquisitions:
Restricted cash	(599)	(1,019)
Accounts receivable	(22,575)	(52,521)
Accounts receivable—related parties	74	(345)
Other current assets	56,235	(39,037)
Other noncurrent assets	(842)	482
Accounts payable and accrued expenses	52,672	12,388
Revenue and severance taxes payable	17,973	8,487
Increase (Decrease) in Other Noncurrent Liabilities	0	2
Net cash provided by operating activities	326,605	51,805
CASH FLOWS FROM INVESTING ACTIVITIES:
Development of oil and natural gas properties	(361,742)	(252,764)
Acquisitions of oil and natural gas properties	(2,088,286)	(548,724)
Additions to other property and equipment	(19,520)	(6,487)
Proceeds From Sales and Exchanges of Oil and Natural Gas Properties	13,557	0
Payments for (Proceeds from) Other Investing Activities	(630)	0
Net cash used in investing activities	(2,456,621)	(807,975)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings under long-term debt	452,480	200,000
Payments on long-term debt	(67,411)	(503)
Debt issuance costs	(9,206)	(4,561)
Proceeds from issuance of common stock, net	2,123,527	659,387
Repurchase of common stock	(137)	(213)
Net cash provided by financing activities	2,499,253	854,110
Net increase in cash and cash equivalents	369,237	97,940
Cash and cash equivalents at beginning of period	133,379	343,084
Cash and cash equivalents at end of period	502,616
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid for interest	15,102	21,241
Cash paid for income taxes	200	315
SUPPLEMENTAL DISCLOSURE OF NON-CASH ACTIVITIES:
Asset retirement obligations incurred, including changes in estimate	8,084	(1,257)
Additions (reductions) to oil and natural gas properties - change in capital accruals	121,663	(6,281)
Additions to other property and equipment funded by capital lease borrowings	2,500	505
Stock Issued	$ 1,183,501	$ 0