Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Total	Noncontrolling Interests	IDRs	IDRs Common Units	Oasis	Oasis Common Units	Oasis Subordinated Units
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance | Predecessor	$ 204,856
Beginning balance	204,856
Equity-based compensation | Predecessor	911
Equity-based compensation	911
Capital contributions prior to initial public offering | Predecessor	85,780
Capital contributions prior to initial public offering	85,780
Net income | Predecessor	40,128
Net income	40,128
Beginning balance | Predecessor	331,675
Beginning balance	331,675
Cumulative effect adjustment for adoption of ASU 2016-09 | Predecessor	(59)
Cumulative effect adjustment for adoption of ASU 2016-09	(59)
Equity-based compensation | Predecessor	999
Equity-based compensation	999
Capital contributions prior to initial public offering | Predecessor	65,145
Capital contributions prior to initial public offering	65,145
Net income | Predecessor	37,577
Net income	37,577
Ending balance (Predecessor) at Sep. 25, 2017	435,337
Ending balance at Sep. 25, 2017	435,337	$ 0		$ 0			$ 0
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income	72,547
Ending balance (Predecessor) at Dec. 31, 2017	0
Ending balance at Dec. 31, 2017	560,020	313,446		167,401			79,173
Beginning balance (Predecessor) at Sep. 25, 2017	435,337
Beginning balance at Sep. 25, 2017	435,337	0		0			0
Increase (Decrease) in Partners' Capital [Roll Forward]
Elimination of current and deferred tax liabilities | Predecessor	104,005
Elimination of current and deferred tax liabilities	104,005
Net assets excluded from initial public offering | Predecessor	(50,726)
Net assets excluded from initial public offering	(50,726)
Allocation of net investment to unitholders | Predecessor	(488,616)					$ 53,704
Allocation of net investment to unitholders	0	290,835					144,077
Net proceeds from initial public offering | Predecessor						134,185
Net proceeds from initial public offering	134,185
Proceeds from initial public offering distributed to Oasis Petroleum | Predecessor						(26,360)
Proceeds from initial public offering distributed to Oasis Petroleum	(132,083)	(35,000)					(70,723)
Contributions from non-controlling interests	34,279	34,279
Equity-based compensation	53			53
Net income	34,970	23,332		5,819	$ 0		5,819
Ending balance (Predecessor) at Dec. 31, 2017	0
Ending balance at Dec. 31, 2017	560,020	313,446		167,401			79,173
Increase (Decrease) in Partners' Capital [Roll Forward]
Elimination of current and deferred tax liabilities | Predecessor	104,000
Proceeds from initial public offering distributed to Oasis Petroleum	(44,918)					(22,478)	(22,440)
Contributions from non-controlling interests	147,453	147,453
Distributions to non-controlling interests	(128,903)	(128,903)
Dropdown of contributed assets from Oasis Petroleum		(115,535)				45,935	69,600
Distribution to Oasis Petroleum for contributed assets	(172,429)					(68,556)	(103,873)
Issuance of common units	44,503					44,503
Equity-based compensation	356					356
Other	(1,046)					(493)	(553)
Net income	146,409	96,354	$ 112			$ 25,913	24,030
Ending balance (Predecessor) at Dec. 31, 2018	0
Ending balance at Dec. 31, 2018	$ 551,445	$ 312,815	$ 112	$ 192,581			$ 45,937