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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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+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-Publisher FASB
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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