Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net income	$ 146,409	$ 72,547	$ 40,128
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	28,404	15,730	8,525
Deferred income taxes	0	5,240	788
Equity-based compensation expenses	356	1,052	911
Deferred financing costs amortization and other	(519)	127	0
Working capital changes:
Change in accounts and insurance receivable	3,411	(56,473)	(2,908)
Change in other current assets	(22)	(94)	0
Change in prepaid expenses	(640)	(304)	(623)
Change in accounts payable and accrued liabilities	27,613	24,400	1,196
Change in current income taxes payable	0	17,618	24,069
Net cash provided by operating activities	205,012	79,843	72,086
Cash flows from investing activities:
Capital expenditures	(276,810)	(181,424)	(157,866)
Acquisitions	0	(74,520)	0
Net cash used in investing activities	(276,810)	(255,944)	(157,866)
Cash flows from financing activities:
Capital contributions from parent prior to initial public offering	0	65,145	85,780
Capital contributions from non-controlling interests	140,277	33,875	0
Proceeds from initial public offering, net of offering costs	0	134,200	0
Proceeds from sale of common units, net of offering costs	44,503	0	0
Distribution to Oasis Petroleum subsequent to initial public offering	0	(132,100)	0
Distributions to non-controlling interests	(128,903)	0	0
Deferred financing costs	(966)	(2,138)	0
Proceeds from revolving credit facility	275,000	78,000	0
Principal payments on revolving credit facility	(35,000)	0	0
Net cash provided by financing activities	77,564	176,984	85,780
Increase in cash and cash equivalents	5,766	883	0
Beginning of period	883	0	0
End of period	6,649	883	0
Supplemental cash flow information:
Cash paid for interest, net of capitalized interest	1,817	0	0
Supplemental non-cash transactions:
Change in accrued capital expenditures	(4,890)	63,199	16,434
Change in asset retirement obligations	198	198	351
Installment notes from acquisition	0	4,875	0
Contribution of capital expenditures from non-controlling interests	7,176	0	0
Non-cash elimination of current and deferred tax liabilities	0	104,005	0
Common Units
Cash flows from financing activities:
Distributions to unitholders	(172,429)	0	0
Subordinated Units
Cash flows from financing activities:
Distributions to unitholders	$ (44,918)	$ 0	$ 0