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Long-Term Debt - Schedule of Long-Term Debt (Details) - USD ($)	Sep. 30, 2021	Jun. 09, 2021	Mar. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Total long-term debt, net	$ 1,041,895,000			$ 710,000,000
Credit Facility | OMP Credit Facility
Debt Instrument [Line Items]
Total long-term debt, net	210,000,000
Senior Notes | Oasis Senior Notes
Debt Instrument [Line Items]
Long-term debt, gross		$ 400,000,000
Less: unamortized deferred financing costs on Senior Notes		$ (9,000,000)
Senior Notes | OMP Senior Notes
Debt Instrument [Line Items]
Long-term debt, gross			$ 450,000,000
Less: unamortized deferred financing costs on Senior Notes			$ (10,200,000)
Oasis Guarantors
Debt Instrument [Line Items]
Total long-term debt, net	391,505,000			260,000,000
Oasis Guarantors | Credit Facility | Oasis Credit Facility
Debt Instrument [Line Items]
Long-term debt, gross	0			260,000,000
Oasis Guarantors | Senior Notes | Oasis Senior Notes
Debt Instrument [Line Items]
Long-term debt, gross	400,000,000			0
Less: unamortized deferred financing costs on Senior Notes	(8,495,000)			0
Oasis Midstream Partners, LP
Debt Instrument [Line Items]
Total long-term debt, net	650,390,000			450,000,000
Oasis Midstream Partners, LP | Credit Facility | OMP Credit Facility
Debt Instrument [Line Items]
Long-term debt, gross	210,000,000			450,000,000
Oasis Midstream Partners, LP | Senior Notes | OMP Senior Notes
Debt Instrument [Line Items]
Long-term debt, gross	450,000,000			0
Less: unamortized deferred financing costs on Senior Notes	$ (9,610,000)			$ 0

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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