Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities
Net (loss) income	$ (288,916)	$ 28,837
Depreciation, depletion, amortization and accretion	83,630	22,176
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Unproved leasehold amortization and impairment and dry hole expense	25,642	4,475
Gain on sale of oil and natural gas properties	0	(838)
Amortization of deferred financing costs	571	39
Amortization of deferred rent	662	0
Loss (gain) on derivative contracts	100,920	(2,385)
Net cash (paid) received upon settlement of derivative contracts	(27,462)	2,385
Equity-based compensation	8,060	0
Deferred income taxes	299,662	0
Other	(111)	(8)
Changes in operating assets and liabilities increasing (decreasing) cash:
Accounts receivable – Oil, natural gas and natural gas liquid sales	27,162	(10,820)
Accounts receivable – Affiliates	(9,994)	(1,877)
Accounts receivable – Joint interest owners and other	(110,671)	(8,410)
Prepaid drilling advances	(55,815)	0
Other current assets	(5,398)	(1,805)
Accounts payable and accrued liabilities	37,773	37,816
Accounts payable and accrued liabilities – Affiliates	(24,474)	1,913
Drilling advances	57,374	(25,363)
Revenue payable	88,029	13,113
Net cash provided by operating activities	206,644	59,248
Cash flows from investing activities
Acquisition of oil and natural gas properties	(22,935)	(42,701)
Capital expenditures for oil and natural gas properties	(485,580)	(138,152)
Acquisition of other property and equipment	(2,353)	(153)
Proceeds from sale of oil and natural gas properties	0	1,435
Purchase of investment	0	(3,000)
Net cash used in investing activities	(510,868)	(182,571)
Cash flows from financing activities
Proceeds from borrowings	309,300	75,340
Repayment of borrowings	0	(40,000)
Deferred financing costs	(2,279)	(2,340)
Proceeds from (Payments for) Other Financing Activities	368	0
Contributions from Citizen members	0	95,557
Distributions to Citizen members	0	(11,147)
Net cash provided by financing activities	306,653	117,410
Net increase (decrease) in cash and cash equivalents	2,429	(5,913)
Cash and cash equivalents, beginning of period	1,471	6,853
Cash and cash equivalents, end of period	3,900	940
Supplemental disclosure of cash flow information
Cash paid for interest, net of capitalized interest	4,024	341
Supplemental disclosure of non-cash investing and financing activities
Change in accrued capital expenditures	38,593	22,456
Acquisition of oil and natural gas properties for equity	39,906	1,281,743
Distribution to Citizen Members of assets and liabilities	$ 0	$ (74,467)