Condensed Consolidating Financial Statements - Schedule of Condensed Consolidating Statement of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues
Total revenues	$ 483,864	$ 482,743	$ 529,405	$ 575,732	$ 599,755	$ 674,629	$ 573,751	$ 473,812	$ 2,071,744	$ 2,321,947	$ 1,293,719
Operating expenses
Lease operating expenses									223,384	193,912	177,134
Marketing, transportation and gathering expenses									128,806	107,193	55,740
Production taxes									112,592	133,696	88,133
Depreciation, depletion and amortization									787,192	636,296	530,802
Exploration expenses									6,658	27,432	11,600
Rig termination									384	0	0
Impairment									10,257	384,228	6,887
General and administrative expenses									143,506	121,346	91,797
Total operating expenses									1,912,866	2,231,522	1,151,525
Gain (loss) on sale of properties									(4,455)	28,587	1,774
Operating income	23,966	8,441	71,572	50,444	69,656	179,045	(242,674)	112,985	154,423	119,012	143,968
Other income (expense)
Equity in earnings of subsidiaries									0	0	0
Net gain (loss) on derivative instruments									(106,314)	28,457	(71,657)
Interest expense, net of capitalized interest									(176,223)	(159,085)	(146,837)
Gain (loss) on extinguishment of debt									4,312	(13,848)	0
Other income (expense)									440	121	(1,332)
Total other expense, net									(277,785)	(144,355)	(219,826)
Loss before income taxes									(123,362)	(25,343)	(75,858)
Income tax benefit									32,715	5,843	203,304
Net income (loss) including non-controlling interests	(64,154)	30,311	51,174	(107,978)	226,866	66,223	(316,301)	3,712	(90,647)	(19,500)	127,446
Less: Net income attributable to non-controlling interests									37,596	15,796	3,650
Net income (loss) attributable to Oasis	$ (76,406)	$ 20,288	$ 42,757	$ (114,882)	$ 221,977	$ 62,341	$ (320,204)	$ 590	(128,243)	(35,296)	123,796
Intercompany Eliminations
Revenues
Total revenues									(270,579)	(157,886)	(33,718)
Operating expenses
Lease operating expenses									(64,042)	(54,345)	(12,414)
Marketing, transportation and gathering expenses									(44,448)	(24,147)	(5,831)
Production taxes									0	0	0
Depreciation, depletion and amortization									(21,002)	(15,462)	(2,439)
Exploration expenses									0	0	0
Rig termination									0
Impairment									0	0	0
General and administrative expenses									(16,849)	(12,296)	(2,442)
Total operating expenses									(260,792)	(148,152)	(31,752)
Gain (loss) on sale of properties									0	0	0
Operating income									(9,787)	(9,734)	(1,966)
Other income (expense)
Equity in earnings of subsidiaries									(153,950)	(225,808)	(353,305)
Net gain (loss) on derivative instruments									0	0	0
Interest expense, net of capitalized interest									0	0	0
Gain (loss) on extinguishment of debt									0	0
Other income (expense)									0	0	0
Total other expense, net									(153,950)	(225,808)	(353,305)
Loss before income taxes									(163,737)	(235,542)	(355,271)
Income tax benefit									0	0	0
Net income (loss) including non-controlling interests									(163,737)	(235,542)	(355,271)
Less: Net income attributable to non-controlling interests									(55,515)	(80,558)	(19,679)
Net income (loss) attributable to Oasis									(108,222)	(154,984)	(335,592)
Parent/ Issuer
Revenues
Total revenues									0	0	0
Operating expenses
Lease operating expenses									0	0	0
Marketing, transportation and gathering expenses									0	0	0
Production taxes									0	0	0
Depreciation, depletion and amortization									0	0	0
Exploration expenses									0	0	0
Rig termination									0
Impairment									0	0	0
General and administrative expenses									16,637	30,003	27,616
Total operating expenses									16,637	30,003	27,616
Gain (loss) on sale of properties									0	0	0
Operating income									(16,637)	(30,003)	(27,616)
Other income (expense)
Equity in earnings of subsidiaries									(13,898)	103,586	323,953
Net gain (loss) on derivative instruments									0	0	0
Interest expense, net of capitalized interest									(132,000)	(131,134)	(131,329)
Gain (loss) on extinguishment of debt									4,312	(13,848)
Other income (expense)									3	1	1
Total other expense, net									(141,583)	(41,395)	192,625
Loss before income taxes									(158,220)	(71,398)	165,009
Income tax benefit									29,977	36,102	(41,213)
Net income (loss) including non-controlling interests									(128,243)	(35,296)	123,796
Less: Net income attributable to non-controlling interests									0	0	0
Net income (loss) attributable to Oasis									(128,243)	(35,296)	123,796
Combined Guarantor Subsidiaries
Revenues
Total revenues									1,932,132	2,206,063	1,267,616
Operating expenses
Lease operating expenses									287,426	248,257	189,548
Marketing, transportation and gathering expenses									173,254	131,340	61,571
Production taxes									112,592	133,696	88,133
Depreciation, depletion and amortization									771,836	623,349	528,615
Exploration expenses									6,658	27,432	11,600
Rig termination									384
Impairment									10,257	384,228	6,887
General and administrative expenses									112,709	79,742	61,513
Total operating expenses									1,979,602	2,226,247	1,130,827
Gain (loss) on sale of properties									(4,455)	28,587	1,774
Operating income									(51,925)	8,403	138,563
Other income (expense)
Equity in earnings of subsidiaries									167,848	122,222	29,352
Net gain (loss) on derivative instruments									(106,314)	28,457	(71,657)
Interest expense, net of capitalized interest									(26,685)	(25,371)	(15,489)
Gain (loss) on extinguishment of debt									0	0
Other income (expense)									440	134	(1,333)
Total other expense, net									35,289	125,442	(59,127)
Loss before income taxes									(16,636)	133,845	79,436
Income tax benefit									2,738	(30,259)	244,517
Net income (loss) including non-controlling interests									(13,898)	103,586	323,953
Less: Net income attributable to non-controlling interests									0	0	0
Net income (loss) attributable to Oasis									(13,898)	103,586	323,953
Combined Non-Guarantor Subsidiaries
Revenues
Total revenues									410,191	273,770	59,821
Operating expenses
Lease operating expenses									0	0	0
Marketing, transportation and gathering expenses									0	0	0
Production taxes									0	0	0
Depreciation, depletion and amortization									36,358	28,409	4,626
Exploration expenses									0	0	0
Rig termination									0
Impairment									0	0	0
General and administrative expenses									31,009	23,897	5,110
Total operating expenses									177,419	123,424	24,834
Gain (loss) on sale of properties									0	0	0
Operating income									232,772	150,346	34,987
Other income (expense)
Equity in earnings of subsidiaries									0	0	0
Net gain (loss) on derivative instruments									0	0	0
Interest expense, net of capitalized interest									(17,538)	(2,580)	(19)
Gain (loss) on extinguishment of debt									0	0
Other income (expense)									(3)	(14)	0
Total other expense, net									(17,541)	(2,594)	(19)
Loss before income taxes									215,231	147,752	34,968
Income tax benefit									0	0	0
Net income (loss) including non-controlling interests									215,231	147,752	34,968
Less: Net income attributable to non-controlling interests									93,111	96,354	23,329
Net income (loss) attributable to Oasis									122,120	51,398	11,639
Oil and gas
Revenues
Total revenues									1,408,771	1,590,024	1,034,634
Oil and gas | Intercompany Eliminations
Revenues
Total revenues									962	0	0
Oil and gas | Parent/ Issuer
Revenues
Total revenues									0	0	0
Oil and gas | Combined Guarantor Subsidiaries
Revenues
Total revenues									1,407,809	1,590,024	1,034,634
Oil and gas | Combined Non-Guarantor Subsidiaries
Revenues
Total revenues									0	0	0
Purchased oil and gas
Revenues
Total revenues									408,791	550,344	133,542
Operating expenses
Operating expenses									409,180	553,461	134,615
Purchased oil and gas | Intercompany Eliminations
Revenues
Total revenues									0	0	0
Operating expenses
Operating expenses									0	(60)	0
Purchased oil and gas | Parent/ Issuer
Revenues
Total revenues									0	0	0
Operating expenses
Operating expenses									0	0	0
Purchased oil and gas | Combined Guarantor Subsidiaries
Revenues
Total revenues									408,791	550,344	133,542
Operating expenses
Operating expenses									409,180	553,521	134,615
Purchased oil and gas | Combined Non-Guarantor Subsidiaries
Revenues
Total revenues									0	0	0
Operating expenses
Operating expenses									0	0	0
Midstream
Revenues
Total revenues									212,208	120,504	72,752
Operating expenses
Operating expenses									62,146	32,758	17,589
Midstream | Intercompany Eliminations
Revenues
Total revenues									(271,541)	(157,886)	(33,718)
Operating expenses
Operating expenses									(114,451)	(41,842)	(8,626)
Midstream | Parent/ Issuer
Revenues
Total revenues									0	0	0
Operating expenses
Operating expenses									0	0	0
Midstream | Combined Guarantor Subsidiaries
Revenues
Total revenues									73,558	4,620	46,649
Operating expenses
Operating expenses									66,545	3,482	11,117
Midstream | Combined Non-Guarantor Subsidiaries
Revenues
Total revenues									410,191	273,770	59,821
Operating expenses
Operating expenses									110,052	71,118	15,098
Well Services
Revenues
Total revenues									41,974	61,075	52,791
Operating expenses
Operating expenses									28,761	41,200	37,228
Well Services | Intercompany Eliminations
Revenues
Total revenues									0	0	0
Operating expenses
Operating expenses									0	0	0
Well Services | Parent/ Issuer
Revenues
Total revenues									0	0	0
Operating expenses
Operating expenses									0	0	0
Well Services | Combined Guarantor Subsidiaries
Revenues
Total revenues									41,974	61,075	52,791
Operating expenses
Operating expenses									28,761	41,200	37,228
Well Services | Combined Non-Guarantor Subsidiaries
Revenues
Total revenues									0	0	0
Operating expenses
Operating expenses									$ 0	$ 0	$ 0