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Acquisition - Pro-Forma Information (Details) - Permian Basin Acquisition [Member] - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Business Acquisition [Line Items] |  |  |  |
Revenues | $ 501,337 | $ 262,991 | $ 928,082 | $ 553,073
Net income attributable to Oasis | $ (320,204) | $ 23,877 | $ (315,073) | $ 51,785
Basic (in usd per share) | $ (1.02) | $ 0.09 | $ (1.01) | $ 0.19
Diluted (in usd per share) | $ (1.02) | $ 0.08 | $ (1.00) | $ 0.18

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