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Condensed Consolidating Financial Information - Schedule of Condensed Consolidating Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenues
Total revenues	$ 482,743			$ 674,629			$ 1,587,880	$ 1,722,192
Operating expenses
Lease operating expenses	50,313			48,534			164,985	137,456
Marketing, transportation and gathering expenses	32,659			30,713			96,097	74,559
Production taxes	28,461			38,722			86,221	103,748
Depreciation, depletion and amortization	210,832			162,984			578,023	465,819
Exploration expenses	652			22,315			2,369	23,701
Impairment	0			0			653	384,228
General and administrative expenses	52,860			34,859			118,245	91,029
Total operating expenses	473,550			532,453			1,453,473	1,711,659
Loss on sale of properties	(752)			36,869			(3,950)	38,823
Operating income	8,441			179,045			130,457	49,356
Other income (expense)
Equity in earnings (loss) of subsidiaries	0			0			0	0
Net gain (loss) on derivative instruments	47,922			(48,544)			(34,940)	(239,945)
Interest expense, net of capitalized interest	(43,897)			(39,560)			(131,551)	(117,616)
Loss on extinguishment of debt	0			(47)			0	(13,698)
Other income (expense)	473			111			706	146
Total other income (expense), net	4,498			(88,040)			(165,785)	(371,113)
Income (loss) before income taxes	12,939			91,005			(35,328)	(321,757)
Income tax benefit (expense)	17,372			(24,782)			8,835	75,391
Net income (loss) including non-controlling interests	30,311	$ 51,174	$ (107,978)	66,223	$ (316,301)	$ 3,712	(26,493)	(246,366)
Less: Net income attributable to non-controlling interests	10,023			3,882			25,344	10,907
Net income (loss) attributable to Oasis	20,288			62,341			(51,837)	(257,273)
Intercompany Eliminations
Revenues
Total revenues	(52,492)			(41,045)			(146,345)	(113,827)
Operating expenses
Lease operating expenses	(17,054)			(14,565)			(43,529)	(38,957)
Marketing, transportation and gathering expenses	(11,750)			(6,126)			(32,123)	(17,605)
Production taxes	0			0			0	0
Depreciation, depletion and amortization	(5,140)			(4,048)			(15,263)	(11,017)
Exploration expenses	0			0			0	0
Impairment							0	0
General and administrative expenses	(4,232)			(2,703)			(12,948)	(8,940)
Total operating expenses	(49,530)			(39,194)			(138,583)	(107,574)
Loss on sale of properties	0			0			0	0
Operating income	(2,962)			(1,851)			(7,762)	(6,253)
Other income (expense)
Equity in earnings (loss) of subsidiaries	(97,072)			(129,657)			(153,688)	58,606
Net gain (loss) on derivative instruments	0			0			0	0
Interest expense, net of capitalized interest	0			0			0	0
Loss on extinguishment of debt				0				0
Other income (expense)	0			0			0	0
Total other income (expense), net	(97,072)			(129,657)			(153,688)	58,606
Income (loss) before income taxes	(100,034)			(131,508)			(161,450)	52,353
Income tax benefit (expense)	0			0			0	0
Net income (loss) including non-controlling interests	(100,034)			(131,508)			(161,450)	52,353
Less: Net income attributable to non-controlling interests	(13,843)			(22,577)			(43,155)	(62,168)
Net income (loss) attributable to Oasis	(86,191)			(108,931)			(118,295)	114,521
Parent/ Issuer
Revenues
Total revenues	0			0			0	0
Operating expenses
Lease operating expenses	0			0			0	0
Marketing, transportation and gathering expenses	0			0			0	0
Production taxes	0			0			0	0
Depreciation, depletion and amortization	0			0			0	0
Exploration expenses	0			0			0	0
Impairment							0	0
General and administrative expenses	569			7,486			15,964	22,214
Total operating expenses	569			7,486			15,964	22,214
Loss on sale of properties	0			0			0	0
Operating income	(569)			(7,486)			(15,964)	(22,214)
Other income (expense)
Equity in earnings (loss) of subsidiaries	54,755			96,555			39,118	(149,295)
Net gain (loss) on derivative instruments	0			0			0	0
Interest expense, net of capitalized interest	(33,133)			(32,836)			(98,424)	(98,417)
Loss on extinguishment of debt				(47)				(13,698)
Other income (expense)	1			0			2	0
Total other income (expense), net	21,623			63,672			(59,304)	(261,410)
Income (loss) before income taxes	21,054			56,186			(75,268)	(283,624)
Income tax benefit (expense)	(766)			6,155			23,431	26,351
Net income (loss) including non-controlling interests	20,288			62,341			(51,837)	(257,273)
Less: Net income attributable to non-controlling interests	0			0			0	0
Net income (loss) attributable to Oasis	20,288			62,341			(51,837)	(257,273)
Combined Guarantor Subsidiaries
Revenues
Total revenues	434,542			644,207			1,444,237	1,636,573
Operating expenses
Lease operating expenses	67,367			63,099			208,514	176,413
Marketing, transportation and gathering expenses	44,409			36,839			128,220	92,164
Production taxes	28,461			38,722			86,221	103,748
Depreciation, depletion and amortization	206,989			159,843			566,812	456,624
Exploration expenses	652			22,315			2,369	23,701
Impairment							653	384,228
General and administrative expenses	48,944			24,627			91,121	60,259
Total operating expenses	481,632			531,707			1,446,253	1,706,045
Loss on sale of properties	(752)			36,869			(3,950)	38,823
Operating income	(47,842)			149,369			(5,966)	(30,649)
Other income (expense)
Equity in earnings (loss) of subsidiaries	42,317			33,102			114,570	90,689
Net gain (loss) on derivative instruments	47,922			(48,544)			(34,940)	(239,945)
Interest expense, net of capitalized interest	(6,252)			(6,561)			(20,658)	(18,591)
Loss on extinguishment of debt				0				0
Other income (expense)	472			126			708	161
Total other income (expense), net	84,459			(21,877)			59,680	(167,686)
Income (loss) before income taxes	36,617			127,492			53,714	(198,335)
Income tax benefit (expense)	18,138			(30,937)			(14,596)	49,040
Net income (loss) including non-controlling interests	54,755			96,555			39,118	(149,295)
Less: Net income attributable to non-controlling interests	0			0			0	0
Net income (loss) attributable to Oasis	54,755			96,555			39,118	(149,295)
Combined Non-guarantor
Revenues
Total revenues	100,693			71,467			289,988	199,446
Operating expenses
Lease operating expenses	0			0			0	0
Marketing, transportation and gathering expenses	0			0			0	0
Production taxes	0			0			0	0
Depreciation, depletion and amortization	8,983			7,189			26,474	20,212
Exploration expenses	0			0			0	0
Impairment							0	0
General and administrative expenses	7,579			5,449			24,108	17,496
Total operating expenses	40,879			32,454			129,839	90,974
Loss on sale of properties	0			0			0	0
Operating income	59,814			39,013			160,149	108,472
Other income (expense)
Equity in earnings (loss) of subsidiaries	0			0			0	0
Net gain (loss) on derivative instruments	0			0			0	0
Interest expense, net of capitalized interest	(4,512)			(163)			(12,469)	(608)
Loss on extinguishment of debt				0				0
Other income (expense)	0			(15)			(4)	(15)
Total other income (expense), net	(4,512)			(178)			(12,473)	(623)
Income (loss) before income taxes	55,302			38,835			147,676	107,849
Income tax benefit (expense)	0			0			0	0
Net income (loss) including non-controlling interests	55,302			38,835			147,676	107,849
Less: Net income attributable to non-controlling interests	23,866			26,459			68,499	73,075
Net income (loss) attributable to Oasis	31,436			12,376			79,177	34,774
Oil and gas revenues
Revenues
Total revenues	344,470			454,195			1,070,256	1,218,639
Oil and gas revenues | Intercompany Eliminations
Revenues
Total revenues	368			0			368	0
Oil and gas revenues | Parent/ Issuer
Revenues
Total revenues	0			0			0	0
Oil and gas revenues | Combined Guarantor Subsidiaries
Revenues
Total revenues	344,102			454,195			1,069,888	1,218,639
Oil and gas revenues | Combined Non-guarantor
Revenues
Total revenues	0			0			0	0
Purchased oil and gas
Revenues
Total revenues	79,352			172,985			337,212	368,758
Operating expenses
Expenses	78,655			174,269			338,221	374,442
Purchased oil and gas | Intercompany Eliminations
Revenues
Total revenues	0			0			0	0
Operating expenses
Expenses	0			(60)			0	(60)
Purchased oil and gas | Parent/ Issuer
Revenues
Total revenues	0			0			0	0
Operating expenses
Expenses	0			0			0	0
Purchased oil and gas | Combined Guarantor Subsidiaries
Revenues
Total revenues	79,352			172,985			337,212	368,758
Operating expenses
Expenses	78,655			174,329			338,221	374,502
Purchased oil and gas | Combined Non-guarantor
Revenues
Total revenues	0			0			0	0
Operating expenses
Expenses	0			0			0	0
Midstream Services
Revenues
Total revenues	50,023			31,187			149,617	88,451
Operating expenses
Expenses	12,967			8,652			47,064	24,325
Midstream Services | Intercompany Eliminations
Revenues
Total revenues	(52,860)			(41,045)			(146,713)	(113,827)
Operating expenses
Expenses	(11,354)			(11,692)			(34,720)	(30,995)
Midstream Services | Parent/ Issuer
Revenues
Total revenues	0			0			0	0
Operating expenses
Expenses	0			0			0	0
Midstream Services | Combined Guarantor Subsidiaries
Revenues
Total revenues	2,190			765			6,342	2,832
Operating expenses
Expenses	4			528			2,527	2,054
Midstream Services | Combined Non-guarantor
Revenues
Total revenues	100,693			71,467			289,988	199,446
Operating expenses
Expenses	24,317			19,816			79,257	53,266
Well Services
Revenues
Total revenues	8,898			16,262			30,795	46,344
Operating expenses
Expenses	6,151			11,405			21,595	32,352
Well Services | Intercompany Eliminations
Revenues
Total revenues	0			0			0	0
Operating expenses
Expenses	0			0			0	0
Well Services | Parent/ Issuer
Revenues
Total revenues	0			0			0	0
Operating expenses
Expenses	0			0			0	0
Well Services | Combined Guarantor Subsidiaries
Revenues
Total revenues	8,898			16,262			30,795	46,344
Operating expenses
Expenses	6,151			11,405			21,595	32,352
Well Services | Combined Non-guarantor
Revenues
Total revenues	0			0			0	0
Operating expenses
Expenses	$ 0			$ 0			$ 0	$ 0

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Exploration expenses (including prospecting) related to oil and gas producing entities and would be included in operating expenses of that entity. Costs incurred in identifying areas that may warrant examination and in examining specific areas that are considered to have prospects of containing oil and gas reserves, including costs of drilling exploratory wells and exploratory-type stratigraphic test wells. Exploration costs may be incurred both before acquiring the related property (sometimes referred to in part as prospecting costs) and after acquiring the property. Principal types of exploration costs, which include depreciation and applicable operating costs of support equipment and facilities and other costs of exploration activities, are: (i) Costs of topographical, geographical and geophysical studies, rights of access to properties to conduct those studies, and salaries and other expenses of geologists, geophysical crews, and others conducting those studies. Collectively, these are sometimes referred to as geological and geophysical or "G&G" costs. (ii) Costs of carrying and retaining undeveloped properties, such as delay rentals, ad valorem taxes on properties, legal costs for title defense, and the maintenance of land and lease records. (iii) Dry hole contributions and bottom hole contributions. (iv) Costs of drilling and equipping exploratory wells. (v) Costs of drilling exploratory-type stratigraphic test wells.

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