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Oasis Midstream Partners LP (Details) - USD ($) $ / shares in Units, $ in Millions |  |  |  |  | 9 Months Ended
--- | --- | --- | --- | --- | ---
Oct. 10, 2017 | Sep. 30, 2017 | Sep. 25, 2017 | May 22, 2017 | Sep. 30, 2017
Common Units [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Sale price of common units to public (in dollars per share) |  |  | $ 17.00 |  |
Subsequent Event [Member] | Over-Allotment Option [Member] | Common Units [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Duration of underwriters' purchase option | 30 days |  |  |  |
Oasis Midstream Partners, LP [Member] | Common Units [Member] | Oasis MIdstream Partners LP [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Units issued in public offering (shares) |  |  | 7,500,000 |  |
Proceeds from issuance in IPO |  |  | $ 115.8 |  |
Sale price of common units to public, net of underwriting costs (in dollars per share) |  |  | $ 15.98 |  |
Oasis Midstream Partners, LP [Member] | Over-Allotment Option [Member] | Common Units [Member] | Oasis MIdstream Partners LP [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Units issued in public offering (shares) |  |  | 1,125,000 |  |
Oasis Midstream Partners, LP [Member] | Subsequent Event [Member] | Common Units [Member] | Oasis MIdstream Partners LP [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Proceeds from issuance in IPO | $ 17.9 |  |  |  |
Commercial Agreements with OPNA, Oasis Petroleum Marketing LLC (“OPM”) and OMS [Member] | Affiliated Entity [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Term of contractual arrangement |  |  |  |  | 15 years
Restricted Stock Units (RSUs) [Member] | OMP General Partner LLC [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Percentage of outstanding units (percent) |  |  |  | 10.00% |
Vesting period |  |  | 1 year | 10 years |
Services and Secondment Agreement [Member] | Commercial Agreements with OPNA, Oasis Petroleum Marketing LLC (“OPM”) and OMS [Member] | Affiliated Entity [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Term of contractual arrangement |  |  |  |  | 15 years
Oasis Midstream Partners, LP [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Net proceeds received |  | $ 113.7 |  |  |
Oasis Midstream Partners, LP [Member] | Common Units [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Units issued in public offering (shares) |  |  | 5,125,000 |  |
Oasis Midstream Partners, LP [Member] | Subordinated Units [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Units issued in public offering (shares) |  |  | 13,750,000 |  |

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