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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, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues
Total revenues	$ 546,448	$ 304,748	$ 1,469,001	$ 843,955
Operating expenses
Lease operating expenses	48,534	45,334	137,456	133,871
Marketing, transportation and gathering expenses	30,713	15,028	74,559	38,018
Production taxes	38,722	21,052	103,748	60,322
Depreciation, depletion and amortization	162,984	132,289	465,819	384,246
Exploration expenses	22,315	854	23,701	4,010
Impairment	0	139	384,228	6,021
General and administrative expenses	34,859	21,368	91,029	67,170
Total operating expenses	404,272	272,354	1,458,468	786,090
Gain on sale of properties	36,869	0	38,823	0
Operating income	179,045	32,394	49,356	57,865
Other income (expense)
Equity In Earnings In Subsidiaries	0	0	0	0
Net gain (loss) on derivative instruments	(48,544)	(54,310)	(239,945)	52,297
Interest expense, net of capitalized interest	(39,560)	(37,389)	(117,616)	(110,548)
Loss on extinguishment of debt	(47)	0	(13,698)	0
Other income (expense)	111	(605)	146	(755)
Total other expense	(88,040)	(92,304)	(371,113)	(59,006)
Income (loss) before income taxes	91,005	(59,910)	(321,757)	(1,141)
Income tax benefit (expense)	(24,782)	18,846	75,391	470
Net loss including non-controlling interests	66,223	(41,064)	(246,366)	(671)
Less: Net income attributable to non-controlling interests	3,882	150	10,907	150
Net income (loss) attributable to Oasis	62,341	(41,214)	(257,273)	(821)
Intercompany Eliminations [Member]
Revenues
Total revenues	(41,045)	0	(113,827)	0
Operating expenses
Lease operating expenses	(14,565)	0	(38,957)	0
Marketing, transportation and gathering expenses	(6,126)	0	(17,605)	0
Production taxes	0	0	0	0
Depreciation, depletion and amortization	(4,048)	0	(11,017)	0
Exploration expenses	0	0	0	0
Impairment		0	0	0
General and administrative expenses	(2,703)	0	(8,940)	0
Total operating expenses	(39,194)	0	(107,574)	0
Gain on sale of properties	0		0
Operating income	(1,851)	0	(6,253)	0
Other income (expense)
Equity In Earnings In Subsidiaries	(135,390)	11,994	41,446	(75,984)
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 expense	(135,390)	11,994	41,446	(75,984)
Income (loss) before income taxes	(137,241)	11,994	35,193	(75,984)
Income tax benefit (expense)	0	0	0	0
Net loss including non-controlling interests	(137,241)	11,994	35,193	(75,984)
Less: Net income attributable to non-controlling interests	(26,459)	(1,112)	(73,075)	(1,112)
Net income (loss) attributable to Oasis	(110,782)	13,106	108,268	(74,872)
Parent/Issuer [Member]
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	0
General and administrative expenses	7,486	6,775	22,214	21,374
Total operating expenses	7,486	6,775	22,214	21,374
Gain on sale of properties	0		0
Operating income	(7,486)	(6,775)	(22,214)	(21,374)
Other income (expense)
Equity In Earnings In Subsidiaries	96,555	(13,599)	(149,295)	74,379
Net gain (loss) on derivative instruments	0	0	0	0
Interest expense, net of capitalized interest	(32,836)	(32,894)	(98,417)	(98,751)
Loss on extinguishment of debt	(47)		(13,698)
Other income (expense)	0	2	0	2
Total other expense	63,672	(46,491)	(261,410)	(24,370)
Income (loss) before income taxes	56,186	(53,266)	(283,624)	(45,744)
Income tax benefit (expense)	6,155	12,052	26,351	44,923
Net loss including non-controlling interests	62,341	(41,214)	(257,273)	(821)
Less: Net income attributable to non-controlling interests	0	0	0	0
Net income (loss) attributable to Oasis	62,341	(41,214)	(257,273)	(821)
Combined Guarantor Subsidiaries [Member]
Revenues
Total revenues	516,026	301,809	1,383,382	841,016
Operating expenses
Lease operating expenses	63,099	45,334	176,413	133,871
Marketing, transportation and gathering expenses	36,839	15,028	92,164	38,018
Production taxes	38,722	21,052	103,748	60,322
Depreciation, depletion and amortization	159,843	132,035	456,624	383,992
Exploration expenses	22,315	854	23,701	4,010
Impairment		139	384,228	6,021
General and administrative expenses	24,627	14,212	60,259	45,415
Total operating expenses	403,526	264,264	1,452,854	763,401
Gain on sale of properties	36,869		38,823
Operating income	149,369	37,545	(30,649)	77,615
Other income (expense)
Equity In Earnings In Subsidiaries	38,835	1,605	107,849	1,605
Net gain (loss) on derivative instruments	(48,544)	(54,310)	(239,945)	52,297
Interest expense, net of capitalized interest	(6,561)	(4,476)	(18,591)	(11,778)
Loss on extinguishment of debt	0		0
Other income (expense)	126	(607)	161	(757)
Total other expense	(16,144)	(57,788)	(150,526)	41,367
Income (loss) before income taxes	133,225	(20,243)	(181,175)	118,982
Income tax benefit (expense)	(30,937)	6,794	49,040	(44,453)
Net loss including non-controlling interests	102,288	(13,449)	(132,135)	74,529
Less: Net income attributable to non-controlling interests	3,882	150	10,907	150
Net income (loss) attributable to Oasis	98,406	(13,599)	(143,042)	74,379
Non-Guarantor Subsidiaries [Member]
Revenues
Total revenues	71,467	2,939	199,446	2,939
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	7,189	254	20,212	254
Exploration expenses	0	0	0	0
Impairment		0	0	0
General and administrative expenses	5,449	381	17,496	381
Total operating expenses	32,454	1,315	90,974	1,315
Gain on sale of properties	0		0
Operating income	39,013	1,624	108,472	1,624
Other income (expense)
Equity In Earnings In Subsidiaries	0	0	0	0
Net gain (loss) on derivative instruments	0	0	0	0
Interest expense, net of capitalized interest	(163)	(19)	(608)	(19)
Loss on extinguishment of debt	0		0
Other income (expense)	(15)	0	(15)	0
Total other expense	(178)	(19)	(623)	(19)
Income (loss) before income taxes	38,835	1,605	107,849	1,605
Income tax benefit (expense)	0	0	0	0
Net loss including non-controlling interests	38,835	1,605	107,849	1,605
Less: Net income attributable to non-controlling interests	26,459	1,112	73,075	1,112
Net income (loss) attributable to Oasis	12,376	493	34,774	493
Oil and Gas [Member]
Revenues
Total revenues	452,643	248,648	1,212,235	704,533
Oil and Gas [Member] | Intercompany Eliminations [Member]
Revenues
Total revenues	0	0	0	0
Oil and Gas [Member] | Parent/Issuer [Member]
Revenues
Total revenues	0	0	0	0
Oil and Gas [Member] | Combined Guarantor Subsidiaries [Member]
Revenues
Total revenues	452,643	248,648	1,212,235	704,533
Oil and Gas [Member] | Non-Guarantor Subsidiaries [Member]
Revenues
Total revenues	0	0	0	0
Purchased Oil and Gas Sales [Member]
Revenues
Total revenues	46,356	21,195	121,971	56,917
Operating expenses
Expenses	46,088	21,701	121,251	57,683
Purchased Oil and Gas Sales [Member] | Intercompany Eliminations [Member]
Revenues
Total revenues	0	0	0	0
Operating expenses
Expenses	(60)	0	(60)	0
Purchased Oil and Gas Sales [Member] | Parent/Issuer [Member]
Revenues
Total revenues	0	0	0	0
Operating expenses
Expenses	0	0	0	0
Purchased Oil and Gas Sales [Member] | Combined Guarantor Subsidiaries [Member]
Revenues
Total revenues	46,356	21,195	121,971	56,917
Operating expenses
Expenses	46,148	21,701	121,311	57,683
Purchased Oil and Gas Sales [Member] | Non-Guarantor Subsidiaries [Member]
Revenues
Total revenues	0	0	0	0
Operating expenses
Expenses	0	0	0	0
Midstream Services [Member]
Revenues
Total revenues	31,187	18,767	88,451	48,939
Operating expenses
Expenses	8,652	4,301	24,325	10,891
Midstream Services [Member] | Intercompany Eliminations [Member]
Revenues
Total revenues	(41,045)	0	(113,827)	0
Operating expenses
Expenses	(11,692)	0	(30,995)	0
Midstream Services [Member] | Parent/Issuer [Member]
Revenues
Total revenues	0	0	0	0
Operating expenses
Expenses	0	0	0	0
Midstream Services [Member] | Combined Guarantor Subsidiaries [Member]
Revenues
Total revenues	765	15,828	2,832	46,000
Operating expenses
Expenses	528	3,621	2,054	10,211
Midstream Services [Member] | Non-Guarantor Subsidiaries [Member]
Revenues
Total revenues	71,467	2,939	199,446	2,939
Operating expenses
Expenses	19,816	680	53,266	680
Well Services [Member]
Revenues
Total revenues	16,262	16,138	46,344	33,566
Operating expenses
Expenses	11,405	10,288	32,352	23,858
Well Services [Member] | Intercompany Eliminations [Member]
Revenues
Total revenues	0	0	0	0
Operating expenses
Expenses	0	0	0	0
Well Services [Member] | Parent/Issuer [Member]
Revenues
Total revenues	0	0	0	0
Operating expenses
Expenses	0	0	0	0
Well Services [Member] | Combined Guarantor Subsidiaries [Member]
Revenues
Total revenues	16,262	16,138	46,344	33,566
Operating expenses
Expenses	11,405	10,288	32,352	23,858
Well Services [Member] | Non-Guarantor Subsidiaries [Member]
Revenues
Total revenues	0	0	0	0
Operating expenses
Expenses	$ 0	$ 0	$ 0	$ 0

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