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Condensed Consolidating Financial Statements - Schedule of Condensed Consolidating Statement of Operations (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Revenues                      
Oil and gas revenues                 $ 1,034,892 $ 625,233 $ 721,672
Purchased oil and gas sales                 87,989 10,272 0
Midstream revenues                 72,752 35,406 23,769
Well services revenues                 52,791 33,754 44,294
Total revenues $ 404,469 $ 304,748 $ 254,091 $ 285,116 $ 217,991 $ 177,311 $ 179,080 $ 130,283 1,248,424 704,665 789,735
Operating expenses                      
Lease operating expenses                 177,134 135,444 144,481
Midstream operating expenses                 17,589 9,003 6,198
Well services operating expenses                 37,228 20,675 24,782
Marketing, transportation and gathering expenses                 55,740 30,108 31,610
Purchased oil and gas expenses                 89,320 10,258 0
Production taxes                 88,133 56,565 69,584
Depreciation, depletion and amortization                 530,802 476,331 485,322
Exploration expenses                 11,600 1,785 2,369
Rig termination                 0 0 3,895
Impairment                 6,887 4,684 46,109
General and administrative expenses                 91,797 89,342 89,549
Total operating expenses                 1,106,230 834,195 903,899
Gain (loss) on sale of properties                 1,774 (1,303) 0
Operating income (loss) 86,103 32,394 5,379 20,092 (1,702) (25,702) (28,214) (75,215) 143,968 (130,833) (114,164)
Other income (expense)                      
Equity in loss of subsidiaries                 0 0 0
Net gain (loss) on derivative instruments                 (71,657) (105,317) 210,376
Interest expense, net of capitalized interest                 (146,837) (140,305) (149,648)
Gain on extinguishment of debt                 0 4,741 0
Other income (expense)                 (1,332) 160 (2,935)
Total other income (expense)                 (219,826) (240,721) 57,793
Loss before income taxes                 (75,858) (371,554) (56,371)
Income tax benefit                 203,304 128,538 16,123
Net income (loss) including non-controlling interests 128,117 (41,064) 16,568 23,825 (54,688) (33,942) (89,931) (64,455) 127,446 (243,016) (40,248)
Less: Net income attributable to non-controlling interests                 3,650 0 0
Net income (loss) attributable to Oasis $ 124,617 $ (41,214) $ 16,568 $ 23,825 $ (54,688) $ (33,942) $ (89,931) $ (64,455) 123,796 (243,016) (40,248)
Intercompany Eliminations                      
Revenues                      
Oil and gas revenues                 0 0 0
Purchased oil and gas sales                 0 0  
Midstream revenues                 (33,718) 0 0
Well services revenues                 0 0 0
Total revenues                 (33,718) 0 0
Operating expenses                      
Lease operating expenses                 (12,414) 0 0
Midstream operating expenses                 (8,626) 0 0
Well services operating expenses                 0 0 0
Marketing, transportation and gathering expenses                 (5,831) 0 0
Purchased oil and gas expenses                 0 0  
Production taxes                 0 0 0
Depreciation, depletion and amortization                 (2,439) 0 0
Exploration expenses                 0 0 0
Rig termination                     0
Impairment                 0 0 0
General and administrative expenses                 (2,442) 0 0
Total operating expenses                 (31,752) 0 0
Gain (loss) on sale of properties                 0 0  
Operating income (loss)                 (1,966) 0 0
Other income (expense)                      
Equity in loss of subsidiaries                 (358,921) 140,978 (69,986)
Net gain (loss) on derivative instruments                 0 0 0
Interest expense, net of capitalized interest                 0 0 0
Gain on extinguishment of debt                   0  
Other income (expense)                 0 0 0
Total other income (expense)                 (358,921) 140,978 (69,986)
Loss before income taxes                 (360,887) 140,978 (69,986)
Income tax benefit                 0 0 0
Net income (loss) including non-controlling interests                 (360,887) 140,978 (69,986)
Less: Net income attributable to non-controlling interests                 (23,329)    
Net income (loss) attributable to Oasis                 (337,558) 140,978 (69,986)
Parent/ Issuer                      
Revenues                      
Oil and gas revenues                 0 0 0
Purchased oil and gas sales                 0 0  
Midstream revenues                 0 0 0
Well services revenues                 0 0 0
Total revenues                 0 0 0
Operating expenses                      
Lease operating expenses                 0 0 0
Midstream operating expenses                 0 0 0
Well services operating expenses                 0 0 0
Marketing, transportation and gathering expenses                 0 0 0
Purchased oil and gas expenses                 0 0  
Production taxes                 0 0 0
Depreciation, depletion and amortization                 0 0 0
Exploration expenses                 0 0 0
Rig termination                     0
Impairment                 0 0 0
General and administrative expenses                 27,616 25,356 27,930
Total operating expenses                 27,616 25,356 27,930
Gain (loss) on sale of properties                 0 0  
Operating income (loss)                 (27,616) (25,356) (27,930)
Other income (expense)                      
Equity in loss of subsidiaries                 323,953 (140,978) 69,986
Net gain (loss) on derivative instruments                 0 0 0
Interest expense, net of capitalized interest                 (131,329) (130,356) (138,166)
Gain on extinguishment of debt                   4,741  
Other income (expense)                 1 137 5
Total other income (expense)                 192,625 (266,456) (68,175)
Loss before income taxes                 165,009 (291,812) (96,105)
Income tax benefit                 (41,213) 48,796 55,857
Net income (loss) including non-controlling interests                 123,796 (243,016) (40,248)
Less: Net income attributable to non-controlling interests                 0    
Net income (loss) attributable to Oasis                 123,796 (243,016) (40,248)
Combined Guarantor Subsidiaries                      
Revenues                      
Oil and gas revenues                 1,034,892 625,233 721,672
Purchased oil and gas sales                 87,989 10,272  
Midstream revenues                 46,649 35,406 23,769
Well services revenues                 52,791 33,754 44,294
Total revenues                 1,222,321 704,665 789,735
Operating expenses                      
Lease operating expenses                 189,548 135,444 144,481
Midstream operating expenses                 11,117 9,003 6,198
Well services operating expenses                 37,228 20,675 24,782
Marketing, transportation and gathering expenses                 61,571 30,108 31,610
Purchased oil and gas expenses                 89,320 10,258  
Production taxes                 88,133 56,565 69,584
Depreciation, depletion and amortization                 528,615 476,331 485,322
Exploration expenses                 11,600 1,785 2,369
Rig termination                     3,895
Impairment                 6,887 4,684 46,109
General and administrative expenses                 61,513 63,986 61,619
Total operating expenses                 1,085,532 808,839 875,969
Gain (loss) on sale of properties                 1,774 (1,303)  
Operating income (loss)                 138,563 (105,477) (86,234)
Other income (expense)                      
Equity in loss of subsidiaries                 34,968 0 0
Net gain (loss) on derivative instruments                 (71,657) (105,317) 210,376
Interest expense, net of capitalized interest                 (15,489) (9,949) (11,482)
Gain on extinguishment of debt                   0  
Other income (expense)                 (1,333) 23 (2,940)
Total other income (expense)                 (53,511) (115,243) 195,954
Loss before income taxes                 85,052 (220,720) 109,720
Income tax benefit                 244,517 79,742 (39,734)
Net income (loss) including non-controlling interests                 329,569 (140,978) 69,986
Less: Net income attributable to non-controlling interests                 3,650    
Net income (loss) attributable to Oasis                 325,919 $ (140,978) $ 69,986
Combined Non-guarantor Subsidiaries                      
Revenues                      
Oil and gas revenues                 0    
Purchased oil and gas sales                 0    
Midstream revenues                 59,821    
Well services revenues                 0    
Total revenues                 59,821    
Operating expenses                      
Lease operating expenses                 0    
Midstream operating expenses                 15,098    
Well services operating expenses                 0    
Marketing, transportation and gathering expenses                 0    
Purchased oil and gas expenses                 0    
Production taxes                 0    
Depreciation, depletion and amortization                 4,626    
Exploration expenses                 0    
Impairment                 0    
General and administrative expenses                 5,110    
Total operating expenses                 24,834    
Gain (loss) on sale of properties                 0    
Operating income (loss)                 34,987    
Other income (expense)                      
Equity in loss of subsidiaries                 0    
Net gain (loss) on derivative instruments                 0    
Interest expense, net of capitalized interest                 (19)    
Other income (expense)                 0    
Total other income (expense)                 (19)    
Loss before income taxes                 34,968    
Income tax benefit                 0    
Net income (loss) including non-controlling interests                 34,968    
Less: Net income attributable to non-controlling interests                 23,329    
Net income (loss) attributable to Oasis                 $ 11,639