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Condensed Consolidating Financial Information - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Condensed Financial Statements, Captions [Line Items]
Ownership percentage, guarantors (as percent)			100.00%
Investments in and advances to subsidiaries	$ 0		$ 0		$ 0
Oasis share of stockholders’ equity	3,676,772		3,676,772		3,734,576
Non-controlling interests	189,686		189,686		184,304
Equity in earnings of subsidiaries	0	$ 0	0	$ 0
Net income attributable to non-controlling interest	8,417	3,903	15,321	7,025
Net income attributable to Oasis	42,757	(320,204)	(72,125)	(319,614)
Distributions to non-controlling interests			10,093	6,846
Investment in / capital contributions from subsidiaries			0	0
(Overstated) / understated
Condensed Financial Statements, Captions [Line Items]
Net income attributable to Oasis		0		0
Intercompany Eliminations
Condensed Financial Statements, Captions [Line Items]
Investments in and advances to subsidiaries	(5,253,737)		(5,253,737)		(5,256,567)
Oasis share of stockholders’ equity	(5,144,195)		(5,144,195)		(5,139,158)
Non-controlling interests	(125,445)		(125,445)		(128,511)
Equity in earnings of subsidiaries	(111,373)	247,085	(56,616)	188,263
Net income attributable to non-controlling interest	(14,420)	(21,139)	(29,312)	(39,591)
Net income attributable to Oasis	(100,053)	265,571	(32,104)	223,452
Distributions to non-controlling interests			(33,488)	(48,911)
Investment in / capital contributions from subsidiaries			(18,565)	(37,540)
Intercompany Eliminations | (Overstated) / understated
Condensed Financial Statements, Captions [Line Items]
Investments in and advances to subsidiaries					20,700
Oasis share of stockholders’ equity					(163,600)
Non-controlling interests					184,300
Equity in earnings of subsidiaries		6,600		11,400
Net income attributable to non-controlling interest		3,900		7,000
Distributions to non-controlling interests				48,900
Parent/ Issuer
Condensed Financial Statements, Captions [Line Items]
Investments in and advances to subsidiaries	4,886,462		4,886,462		4,900,528
Oasis share of stockholders’ equity	3,676,772		3,676,772		3,734,576
Non-controlling interests	0		0		0
Equity in earnings of subsidiaries	73,855	(278,014)	(15,637)	(245,850)
Net income attributable to non-controlling interest	0	0	0	0
Net income attributable to Oasis	42,757	(320,204)	(72,125)	(319,614)
Distributions to non-controlling interests			0	0
Investment in / capital contributions from subsidiaries			3,124	(5,619)
Parent/ Issuer | (Overstated) / understated
Condensed Financial Statements, Captions [Line Items]
Investments in and advances to subsidiaries					(9,600)
Oasis share of stockholders’ equity					(9,600)
Combined Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Investments in and advances to subsidiaries	367,275		367,275		356,039
Oasis share of stockholders’ equity	4,886,462		4,886,462		4,900,528
Non-controlling interests	0		0		0
Equity in earnings of subsidiaries	37,518	30,929	72,253	57,587
Net income attributable to non-controlling interest	0	0	0	0
Net income attributable to Oasis	73,855	(278,014)	(15,637)	(245,850)
Distributions to non-controlling interests			0	0
Investment in / capital contributions from subsidiaries			42,642	33,695
Combined Guarantor Subsidiaries | (Overstated) / understated
Condensed Financial Statements, Captions [Line Items]
Investments in and advances to subsidiaries					(11,100)
Oasis share of stockholders’ equity					173,200
Non-controlling interests					(184,300)
Equity in earnings of subsidiaries		(6,600)		(11,400)
Net income attributable to non-controlling interest		(3,900)		(7,000)
Distributions to non-controlling interests				(48,900)
Combined Non-guarantor
Condensed Financial Statements, Captions [Line Items]
Investments in and advances to subsidiaries	0		0		0
Oasis share of stockholders’ equity	257,733		257,733		238,630
Non-controlling interests	315,131		315,131		$ 312,815
Equity in earnings of subsidiaries	0	0	0	0
Net income attributable to non-controlling interest	22,837	25,042	44,633	46,616
Net income attributable to Oasis	$ 26,198	$ 12,443	47,741	22,398
Distributions to non-controlling interests			43,581	55,757
Investment in / capital contributions from subsidiaries			$ (27,201)	$ 9,464

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