Consolidated Statements of Unitholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	General Partner	Non-Controlling Interest	Common Units Limited Partner	Class B Units Limited Partner
Beginning balance at Dec. 31, 2018	$ 1,237,042	$ 1,000	$ 694,940	$ 540,112	$ 990
Beginning balance (in shares) at Dec. 31, 2018				51,654	72,419
Increase (Decrease) in Partners' Capital [Roll Forward]
Net proceeds from the issuance of common units - public, units				10,925
Net proceeds from the issuance of common units - public	340,648			$ 340,648
Unit-based compensation, units				60
Unit-based compensation	405			$ 405
Distributions to public	(25,970)			(25,970)
Distributions to Diamondback	(37,326)		(36,934)	(392)
Distributions to General Partner	(20)			(20)
Change in ownership of consolidated subsidiaries, net	18,925		90,120	$ (71,195)
Units repurchased for tax withholding, units				(11)
Units repurchased for tax withholding	(353)			$ (353)
Net income	74,311		40,532	$ 33,779
Ending balance (in shares) at Mar. 31, 2019				62,628	72,419
Ending balance at Mar. 31, 2019	1,607,662	1,000	788,658	$ 817,014	$ 990
Beginning balance at Dec. 31, 2019	2,185,420	889	1,254,285	$ 929,116	$ 1,130
Beginning balance (in shares) at Dec. 31, 2019				67,806	90,710
Increase (Decrease) in Partners' Capital [Roll Forward]
Unit-based compensation, units				42
Unit-based compensation	387			$ 387
Distribution equivalent rights payments	(20)			(20)
Distributions to public	(30,194)			(30,194)
Distributions to Diamondback	(41,173)		(40,819)	$ (329)	$ (25)
Distributions to General Partner	(20)	(20)
Units repurchased for tax withholding, units				(17)
Units repurchased for tax withholding	(383)			$ (383)
Net income	(123,850)		18,319	$ (142,169)
Ending balance (in shares) at Mar. 31, 2020				67,831	90,710
Ending balance at Mar. 31, 2020	$ 1,990,167	$ 869	$ 1,231,785	$ 756,408	$ 1,105