Condensed Consolidated Statement of Equity (Unaudited) - 9 months ended Sep. 30, 2018 - USD ($) $ in Thousands		Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Members' Equity
Beginning balance (shares) at Dec. 31, 2017			0
Beginning balance at Dec. 31, 2017		$ 1,584,769	$ 0	$ 0	$ 0	$ 1,584,769
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Acquisition of oil and natural gas properties in exchange for equity units		39,906				39,906
Equity-based compensation	[1]	8,060		192	0	7,868
Net loss	[1]	(288,916)			(299,765)	10,849
Issuance of common stock upon Reorganization (shares)			152,540,000
Issuance of common stock upon Reorganization		0	$ 153	1,643,239		(1,643,392)
Ending balance (shares) at Sep. 30, 2018			152,540,000
Ending balance at Sep. 30, 2018		$ 1,343,819	$ 153	$ 1,643,431	$ (299,765)	$ 0

[1] Amounts are allocated to stockholders' equity and members' equity to reflect the Reorganization. See Note 10 – Equity for discussion of the Reorganization.