Consolidated Statements of Cash Flows - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018		Dec. 31, 2017
Cash flows from operating activities:
Net income		$ 185,719	$ 62,960	[1]	$ 20,665	[1]
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for deferred income taxes		26,253	5,845	[1]	4,471	[1]
Depreciation, amortization and accretion		42,336	25,134	[1]	3,486	[1]
Loss on disposal of property, plant and equipment		1,524	2,577	[1]	0	[1]
Unit-based compensation expense		5,208	0	[1]	0	[1]
Loss (Income) from equity method investments		6,329	0	[1]	(1,366)	[1]
Changes in operating assets and liabilities:
Accounts receivable—related party		(65,032)	17,625	[1]	(29,108)	[1]
Accounts receivable—third party		(1,212)	(1,849)	[1]	0	[1]
Accounts payable, accrued liabilities and taxes payable		34,299	61,139	[1]	2,143	[1]
Other		(17,231)	0	[1]	(283)	[1]
Net cash provided by operating activities		218,193	173,431	[1]	8	[1]
Cash flows from investing activities:
Additions to property, plant and equipment		(241,786)	(164,876)	[1]	0	[1]
Contributions to equity method investments		(336,601)	0	[1]	0	[1]
Proceeds from the sale of fixed assets		18	0	[1]	0	[1]
Net cash used in investing activities		(578,369)	(164,876)	[1]	0	[1]
Cash flows from financing activities:
Proceeds from borrowings from credit facility		463,000	0	[1]	0	[1]
Payments on credit facility		(39,000)	0	[1]	0	[1]
Distribution equivalent rights		(751)	0	[1]	0	[1]
Debt issuance costs		(4,310)	0	[1]	0	[1]
Net proceeds from initial public offering—public		719,377	0	[1]	0	[1]
Net proceeds from initial public offering—General Partner		1,000	0	[1]	0	[1]
Net proceeds from initial public offering—Diamondback		999	1	[1]	0	[1]
Distribution to General Partner (Note 1)		(21)	0	[1]	0	[1]
Distribution to General Partner (Note 1)		(763,191)	0	[1]	0	[1]
Distribution to public (Note 1)		(14,858)	0	[1]	0	[1]
Net cash provided by financing activities		362,245	1	[1]	0	[1]
Net increase in cash		2,069	8,556	[1]	8	[1]
Cash at beginning of period	[1]	8,564	8		0
Cash at end of period		10,633	8,564	[1]	8	[1]
Supplemental disclosure of cash flow information:
Interest paid		2,707	0	[1]	0	[1]
Supplemental disclosure of non-cash financing activity:
Contributions from Diamondback		456,055	171,557	[1]	179,214	[1]
Supplemental disclosure of non-cash investing activity:
Increase in long term assets and inventory due to contributions from Diamondback		456,055	171,557	[1]	179,214	[1]
Change in accrued liabilities related to property, plant and equipment		$ 4,176	$ 2,693	[1]	$ 0	[1]

[1] See Note 1 for information regarding the basis of financial statement presentation.