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Summary of Significant Accounting Policies - Consolidation and Midstream Simplification (Details) - USD ($) $ in Millions | Mar. 30, 2021 | Sep. 30, 2021
--- | --- | ---
Simplification Transaction | OMP |  |
Related Party Transaction [Line Items] |  |
Consideration contributed | $ 512.5 |
Cumulative cash distributions | $ 231.5 |
Ownership interest (in shares) | 12,949,644 |
Units converted (in shares) | 1,850,356 |
Bobcat DevCo | Oasis Midstream Partners, LP |  |
Related Party Transaction [Line Items] |  |
Percentage acquired | 64.70% |
Beartooth DevCo | Oasis Midstream Partners, LP |  |
Related Party Transaction [Line Items] |  |
Percentage acquired | 30.00% |
Oasis Midstream Partners, LP |  |
Related Party Transaction [Line Items] |  |
Parent ownership interest |  | 70.00%

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