Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net (loss) income	$ (123,850)	$ 74,311
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Provision for (benefit from) deferred income taxes	142,466	(34,655)
Depletion	24,642	16,199
Change in fair value of derivative instruments	7,489	0
Loss (gain) on revaluation of investment	10,120	(3,592)
Amortization of debt issuance costs	574	216
Non-cash unit-based compensation	387	405
Changes in operating assets and liabilities:
Royalty income receivable	20,129	740
Royalty income receivable—related party	10,576	(3,887)
Accounts payable and accrued liabilities	3,665	(3,289)
Accounts payable—related party	(150)	0
Income tax payable	0	47
Other current assets	63	(44)
Net cash provided by operating activities	96,111	46,451
Cash flows from investing activities:
Acquisitions of oil and natural gas interests	(64,626)	(81,923)
Net cash used in investing activities	(64,626)	(81,923)
Cash flows from financing activities:
Proceeds from borrowings under credit facility	92,000	59,500
Repayment on credit facility	(15,000)	(313,500)
Debt issuance costs	(26)	(50)
Proceeds from public offerings	0	340,860
Public offering costs	0	(212)
Units purchased for tax withholding	(383)	(353)
Distributions to General Partner	(20)	(20)
Distributions to public	(30,214)	(25,970)
Distributions to Diamondback	(41,173)	(37,326)
Net cash provided by financing activities	5,184	22,929
Net increase (decrease) in cash	36,669	(12,543)
Cash and cash equivalents at beginning of period	3,602	22,676
Cash and cash equivalents at end of period	40,271	10,133
Supplemental disclosure of cash flow information:
Interest paid	$ 1,617	$ 4,908