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Condensed Consolidating Financial Information - Schedule of Condensed Consolidating Statement of Operations (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Revenues    
Oil and gas revenues $ 363,671 $ 237,252
Purchased oil and gas sales 18,037 27,631
Midstream revenues 27,922 14,606
Well services revenues 11,586 5,627
Total revenues 421,216 285,116
Operating expenses    
Lease operating expenses 44,781 43,872
Midstream operating expenses 7,985 3,327
Well services operating expenses 7,387 4,560
Marketing, transportation and gathering expenses 21,013 10,951
Purchased oil and gas expenses 17,998 28,002
Production taxes 31,000 20,299
Depreciation, depletion and amortization 149,265 126,666
Exploration expenses 769 1,489
Impairment 93 2,682
General and administrative expenses 27,940 23,176
Total operating expenses 308,231 265,024
Operating income 112,985 20,092
Other income (expense)    
Equity In Earnings In Subsidiaries 0 0
Net gain (loss) on derivative instruments (71,116) 56,075
Interest expense, net of capitalized interest (37,146) (36,321)
Other income (expense) (183) 16
Total other income (expense) (108,445) 19,770
Income before income taxes 4,540 39,862
Income tax benefit (expense) (828) (16,037)
Net income including non-controlling interests 3,712 23,825
Less: Net income attributable to non-controlling interests 3,122 0
Net income attributable to Oasis 590 23,825
Intercompany Eliminations [Member]    
Revenues    
Oil and gas revenues 0 0
Purchased oil and gas sales 0 0
Midstream revenues (34,649) 0
Well services revenues 0 0
Total revenues (34,649) 0
Operating expenses    
Lease operating expenses (10,918) 0
Midstream operating expenses (9,877) 0
Well services operating expenses 0 0
Marketing, transportation and gathering expenses (5,659) 0
Purchased oil and gas expenses 0 0
Production taxes 0 0
Depreciation, depletion and amortization (3,326) 0
Exploration expenses 0 0
Impairment 0 0
General and administrative expenses (3,120) 0
Total operating expenses (32,900) 0
Operating income (1,749) 0
Other income (expense)    
Equity In Earnings In Subsidiaries (63,693) (49,103)
Net gain (loss) on derivative instruments 0 0
Interest expense, net of capitalized interest 0 0
Other income (expense) 0 0
Total other income (expense) (63,693) (49,103)
Income before income taxes (65,442) (49,103)
Income tax benefit (expense) 0 0
Net income including non-controlling interests (65,442) (49,103)
Less: Net income attributable to non-controlling interests (21,574)  
Net income attributable to Oasis (43,868) (49,103)
Parent/Issuer [Member]    
Revenues    
Oil and gas revenues 0 0
Purchased oil and gas sales 0 0
Midstream revenues 0 0
Well services revenues 0 0
Total revenues 0 0
Operating expenses    
Lease operating expenses 0 0
Midstream operating expenses 0 0
Well services operating expenses 0 0
Marketing, transportation and gathering expenses 0 0
Purchased oil and gas expenses 0 0
Production taxes 0 0
Depreciation, depletion and amortization 0 0
Exploration expenses 0 0
Impairment 0 0
General and administrative expenses 7,232 7,065
Total operating expenses 7,232 7,065
Operating income (7,232) (7,065)
Other income (expense)    
Equity In Earnings In Subsidiaries 32,164 49,103
Net gain (loss) on derivative instruments 0 0
Interest expense, net of capitalized interest (32,446) (32,851)
Other income (expense) 0 0
Total other income (expense) (282) 16,252
Income before income taxes (7,514) 9,187
Income tax benefit (expense) 8,104 14,638
Net income including non-controlling interests 590 23,825
Less: Net income attributable to non-controlling interests 0  
Net income attributable to Oasis 590 23,825
Combined Guarantor Subsidiaries [Member]    
Revenues    
Oil and gas revenues 363,671 237,252
Purchased oil and gas sales 18,037 27,631
Midstream revenues 1,150 14,606
Well services revenues 11,586 5,627
Total revenues 394,444 285,116
Operating expenses    
Lease operating expenses 55,699 43,872
Midstream operating expenses 746 3,327
Well services operating expenses 7,387 4,560
Marketing, transportation and gathering expenses 26,672 10,951
Purchased oil and gas expenses 17,998 28,002
Production taxes 31,000 20,299
Depreciation, depletion and amortization 146,227 126,666
Exploration expenses 769 1,489
Impairment 93 2,682
General and administrative expenses 17,678 16,111
Total operating expenses 304,269 257,959
Operating income 90,175 27,157
Other income (expense)    
Equity In Earnings In Subsidiaries 31,529 0
Net gain (loss) on derivative instruments (71,116) 56,075
Interest expense, net of capitalized interest (4,438) (3,470)
Other income (expense) (183) 16
Total other income (expense) (44,208) 52,621
Income before income taxes 45,967 79,778
Income tax benefit (expense) (8,932) (30,675)
Net income including non-controlling interests 37,035 49,103
Less: Net income attributable to non-controlling interests 3,122  
Net income attributable to Oasis 33,913 $ 49,103
Non-Guarantor Subsidiaries [Member]    
Revenues    
Oil and gas revenues 0  
Purchased oil and gas sales 0  
Midstream revenues 61,421  
Well services revenues 0  
Total revenues 61,421  
Operating expenses    
Lease operating expenses 0  
Midstream operating expenses 17,116  
Well services operating expenses 0  
Marketing, transportation and gathering expenses 0  
Purchased oil and gas expenses 0  
Production taxes 0  
Depreciation, depletion and amortization 6,364  
Exploration expenses 0  
Impairment 0  
General and administrative expenses 6,150  
Total operating expenses 29,630  
Operating income 31,791  
Other income (expense)    
Equity In Earnings In Subsidiaries 0  
Net gain (loss) on derivative instruments 0  
Interest expense, net of capitalized interest (262)  
Other income (expense) 0  
Total other income (expense) (262)  
Income before income taxes 31,529  
Income tax benefit (expense) 0  
Net income including non-controlling interests 31,529  
Less: Net income attributable to non-controlling interests 21,574  
Net income attributable to Oasis $ 9,955