Acquisitions - Preliminary Purchase Price Allocation (Details) - USD ($) $ in Thousands	1 Months Ended		7 Months Ended	13 Months Ended
	Jun. 30, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2019
PAI (Final)
Business Acquisition [Line Items]
Cash consideration paid		$ 780,700		$ 780,678
Fair value of net assets contributed				154,468
Contingent consideration				52,540
NCI in acquired assets				246,922
Total purchase consideration				1,234,608
Fair value of Property, plant and equipment			$ 1,617,371	1,617,371
Other assets			5,628	5,628
Less: Asset retirement obligations			(388,391)	(388,391)
Total net assets			1,234,608	$ 1,234,608
LLOG Exploration Offshore L.L.C. and LLOG Bluewater Holdings, L.L.C. [Member]
Business Acquisition [Line Items]
Cash consideration paid	$ 1,238,400		1,238,353
Fair value of net assets contributed			0
Contingent consideration			89,444
NCI in acquired assets			0
Total purchase consideration			$ 1,327,797
Fair value of Property, plant and equipment		1,358,372
Other assets		6,697
Less: Asset retirement obligations		(37,272)
Total net assets		$ 1,327,797