Variable Interest Entities (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	12 Months Ended
	Jul. 31, 2016	Mar. 31, 2020	Dec. 31, 2019
Variable Interest Entity [Line Items]
Acquisitions, earnout and capital investments		$ 128,140	$ 128,140
Earnings in equity investments		24,774	25,976
Distributions received		(55,420)	(53,805)
Maximum exposure to loss		97,494	$ 100,311
Carnero Gathering, Joint Venture
Variable Interest Entity [Line Items]
Payments to acquire interest in joint venture	$ 37,000	124,100
Debt incurred		$ 0