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Condensed Consolidating Financial Statements - Schedule of Condensed Consolidating Statement of Cash Flows (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Cash flows from operating activities:                      
Net income (loss) $ (64,154) $ 30,311 $ 51,174 $ (107,978) $ 226,866 $ 66,223 $ (316,301) $ 3,712 $ (90,647) $ (19,500) $ 127,446
Adjustments to reconcile net income to net cash provided by (used in) operating activities:                      
Equity in (earnings) loss of subsidiaries                 0 0 0
Depreciation, depletion and amortization                 787,192 636,296 530,802
(Gain) loss on extinguishment of debt                 (4,312) 13,848 0
(Gain) loss on sale of properties                 4,455 (28,587) (1,774)
Impairment                 10,257 384,228 6,887
Deferred income taxes                 (32,699) (5,866) (202,884)
Derivative instruments                 106,314 (28,457) 71,657
Equity-based compensation expenses                 33,607 29,273 26,534
Deferred financing costs amortization and other                 27,263 29,057 18,311
Working capital and other changes:                      
Change in accounts receivable, net                 13,729 (23,508) (166,386)
Change in inventory                 (5,893) (14,346) (2,501)
Change in prepaid expenses                 325 (2,354) (838)
Change in accounts payable, interest payable and accrued liabilities                 53,051 26,116 123,107
Change in other assets and liabilities, net                 (9,789) 221 (22,485)
Net cash provided by operating activities                 892,853 996,421 507,876
Cash flows from investing activities:                      
Capital expenditures                 (869,221) (1,148,961) (647,349)
Acquisitions                 (21,009) (581,650) (61,874)
Proceeds from sale of properties                 42,376 333,229 5,774
Costs related to sale of properties                 0 (2,850) (366)
Derivative settlements                   (213,528) (8,264)
Derivative settlements                 19,098    
Other                 0 224 (2,681)
Net cash used in investing activities                 (828,756) (1,613,536) (714,760)
Cash flows from financing activities:                      
Proceeds from Revolving Credit Facilities                 1,982,000 3,224,000 1,162,000
Principal payments on Revolving Credit Facilities                 (1,972,500) (2,586,000) (1,377,000)
Repurchase of senior unsecured notes                 (45,790) (423,340) 0
Proceeds from issuance of senior unsecured notes                 0 400,000 0
Deferred financing costs                 (1,052) (13,862) (2,714)
Proceeds from sale of common stock, net of offering costs                 0 0 302,191
Proceeds from sale of Oasis Midstream common units, net of offering costs                 0 44,503 134,185
Purchases of treasury stock                 (4,856) (6,846) (6,229)
Distributions to non-controlling interests                 (21,270) (14,114) 0
Investment in subsidiaries / capital contributions from parent                   0  
Investment in subsidiaries / capital contributions from parent                 0   0
Payments on finance lease liabilities                 (2,382)    
Other                 (418) (1,756) (55)
Net cash provided by (used in) financing activities                 (66,268) 622,585 212,378
Increase (decrease) in cash and cash equivalents                 (2,171) 5,470 5,494
Beginning of period       22,190       16,720 22,190 16,720 11,226
End of period 20,019       22,190       20,019 22,190 16,720
Intercompany Eliminations                      
Cash flows from operating activities:                      
Net income (loss)                 (163,737) (235,542) (355,271)
Adjustments to reconcile net income to net cash provided by (used in) operating activities:                      
Equity in (earnings) loss of subsidiaries                 153,950 225,808 353,305
Depreciation, depletion and amortization                 (21,002) (15,462) (2,439)
(Gain) loss on extinguishment of debt                 0 0  
(Gain) loss on sale of properties                 0 0 0
Impairment                 0 0 0
Deferred income taxes                 0 0 0
Derivative instruments                 0 0 0
Equity-based compensation expenses                 0 0 0
Deferred financing costs amortization and other                 0 0 0
Working capital and other changes:                      
Change in accounts receivable, net                 (147,572) 243,025 277,887
Change in inventory                 0 0 0
Change in prepaid expenses                 0 0 0
Change in accounts payable, interest payable and accrued liabilities                 147,572 (243,025) (277,887)
Change in other assets and liabilities, net                 (1,576) 0 0
Net cash provided by operating activities                 (32,365) (25,196) (4,405)
Cash flows from investing activities:                      
Capital expenditures                 (24,939) 0 0
Acquisitions                 24,939 0 66,679
Proceeds from sale of properties                 0 0 (66,679)
Costs related to sale of properties                   0 0
Derivative settlements                   0 0
Derivative settlements                 0    
Other                   0 0
Net cash used in investing activities                 0 0 0
Cash flows from financing activities:                      
Proceeds from Revolving Credit Facilities                 0 0 0
Principal payments on Revolving Credit Facilities                 0 0 0
Repurchase of senior unsecured notes                 0 0  
Proceeds from issuance of senior unsecured notes                   0  
Deferred financing costs                 0 0 0
Proceeds from sale of common stock, net of offering costs                     0
Proceeds from sale of Oasis Midstream common units, net of offering costs                   0 0
Purchases of treasury stock                 0 0 0
Distributions to non-controlling interests                 74,501 114,789  
Investment in subsidiaries / capital contributions from parent                   (89,593)  
Investment in subsidiaries / capital contributions from parent                 (42,136)   4,405
Payments on finance lease liabilities                 0    
Other                 0 0 0
Net cash provided by (used in) financing activities                 32,365 25,196 4,405
Increase (decrease) in cash and cash equivalents                 0 0 0
Beginning of period       0       0 0 0 0
End of period 0       0       0 0 0
Parent/ Issuer                      
Cash flows from operating activities:                      
Net income (loss)                 (128,243) (35,296) 123,796
Adjustments to reconcile net income to net cash provided by (used in) operating activities:                      
Equity in (earnings) loss of subsidiaries                 13,898 (103,586) (323,953)
Depreciation, depletion and amortization                 0 0 0
(Gain) loss on extinguishment of debt                 (4,312) 13,848  
(Gain) loss on sale of properties                 0 0 0
Impairment                 0 0 0
Deferred income taxes                 (29,977) (36,102) 41,213
Derivative instruments                 0 0 0
Equity-based compensation expenses                 13,933 27,456 25,436
Deferred financing costs amortization and other                 16,898 16,069 15,392
Working capital and other changes:                      
Change in accounts receivable, net                 144,174 (217,714) (173,668)
Change in inventory                 0 0 0
Change in prepaid expenses                 (177) (106) 9
Change in accounts payable, interest payable and accrued liabilities                 5,316 6,886 7,074
Change in other assets and liabilities, net                 0 0 0
Net cash provided by operating activities                 31,510 (328,545) (284,701)
Cash flows from investing activities:                      
Capital expenditures                 0 0 0
Acquisitions                 0 0 0
Proceeds from sale of properties                 0 0 0
Costs related to sale of properties                   0 0
Derivative settlements                   0 0
Derivative settlements                 0    
Other                   0 0
Net cash used in investing activities                 0 0 0
Cash flows from financing activities:                      
Proceeds from Revolving Credit Facilities                 0 0 0
Principal payments on Revolving Credit Facilities                 0 0 0
Repurchase of senior unsecured notes                 (45,789) (423,340)  
Proceeds from issuance of senior unsecured notes                   400,000  
Deferred financing costs                 0 (6,908) 0
Proceeds from sale of common stock, net of offering costs                     302,191
Proceeds from sale of Oasis Midstream common units, net of offering costs                   0 0
Purchases of treasury stock                 (4,856) (6,846) (6,229)
Distributions to non-controlling interests                 0 0  
Investment in subsidiaries / capital contributions from parent                   365,602  
Investment in subsidiaries / capital contributions from parent                 19,102   (11,194)
Payments on finance lease liabilities                 0    
Other                 0 38 (55)
Net cash provided by (used in) financing activities                 (31,543) 328,546 284,713
Increase (decrease) in cash and cash equivalents                 (33) 1 12
Beginning of period       179       178 179 178 166
End of period 146       179       146 179 178
Combined Guarantor Subsidiaries                      
Cash flows from operating activities:                      
Net income (loss)                 (13,898) 103,586 323,953
Adjustments to reconcile net income to net cash provided by (used in) operating activities:                      
Equity in (earnings) loss of subsidiaries                 (167,848) (122,222) (29,352)
Depreciation, depletion and amortization                 771,836 623,349 528,615
(Gain) loss on extinguishment of debt                 0 0  
(Gain) loss on sale of properties                 4,455 (28,587) (1,774)
Impairment                 10,257 384,228 6,887
Deferred income taxes                 (2,722) 30,236 (244,097)
Derivative instruments                 106,314 (28,457) 71,657
Equity-based compensation expenses                 19,296 1,461 1,045
Deferred financing costs amortization and other                 9,419 13,507 2,794
Working capital and other changes:                      
Change in accounts receivable, net                 17,164 (52,013) (216,982)
Change in inventory                 (5,893) (14,324) (2,501)
Change in prepaid expenses                 1,007 (1,608) (98)
Change in accounts payable, interest payable and accrued liabilities                 (96,526) 234,441 337,319
Change in other assets and liabilities, net                 (11,692) 221 (22,485)
Net cash provided by operating activities                 641,169 1,143,818 754,981
Cash flows from investing activities:                      
Capital expenditures                 (618,450) (865,935) (594,945)
Acquisitions                 (21,009) (581,650) (61,874)
Proceeds from sale of properties                 42,376 333,229 72,453
Costs related to sale of properties                   (2,850) (366)
Derivative settlements                   (213,528) (8,264)
Derivative settlements                 19,098    
Other                   224 (2,681)
Net cash used in investing activities                 (577,985) (1,330,510) (595,677)
Cash flows from financing activities:                      
Proceeds from Revolving Credit Facilities                 1,829,000 2,949,000 1,084,000
Principal payments on Revolving Credit Facilities                 (1,960,000) (2,551,000) (1,377,000)
Repurchase of senior unsecured notes                 (1) 0  
Proceeds from issuance of senior unsecured notes                   0  
Deferred financing costs                 (79) (5,988) (577)
Proceeds from sale of common stock, net of offering costs                     0
Proceeds from sale of Oasis Midstream common units, net of offering costs                   0 0
Purchases of treasury stock                 0 0 0
Distributions to non-controlling interests                 0 0  
Investment in subsidiaries / capital contributions from parent                   (203,823)  
Investment in subsidiaries / capital contributions from parent                 70,563   138,872
Payments on finance lease liabilities                 (2,323)    
Other                 (1) (1,794) 0
Net cash provided by (used in) financing activities                 (62,841) 186,395 (154,705)
Increase (decrease) in cash and cash equivalents                 343 (297) 4,599
Beginning of period       15,362       15,659 15,362 15,659 11,060
End of period 15,705       15,362       15,705 15,362 15,659
Combined Non-Guarantor Subsidiaries                      
Cash flows from operating activities:                      
Net income (loss)                 215,231 147,752 34,968
Adjustments to reconcile net income to net cash provided by (used in) operating activities:                      
Equity in (earnings) loss of subsidiaries                 0 0 0
Depreciation, depletion and amortization                 36,358 28,409 4,626
(Gain) loss on extinguishment of debt                 0 0  
(Gain) loss on sale of properties                 0 0 0
Impairment                 0 0 0
Deferred income taxes                 0 0 0
Derivative instruments                 0 0 0
Equity-based compensation expenses                 378 356 53
Deferred financing costs amortization and other                 946 (519) 125
Working capital and other changes:                      
Change in accounts receivable, net                 (37) 3,194 (53,623)
Change in inventory                 0 (22) 0
Change in prepaid expenses                 (505) (640) (749)
Change in accounts payable, interest payable and accrued liabilities                 (3,311) 27,814 56,601
Change in other assets and liabilities, net                 3,479 0 0
Net cash provided by operating activities                 252,539 206,344 42,001
Cash flows from investing activities:                      
Capital expenditures                 (225,832) (283,026) (52,404)
Acquisitions                 (24,939) 0 (66,679)
Proceeds from sale of properties                 0 0 0
Costs related to sale of properties                   0 0
Derivative settlements                   0 0
Derivative settlements                 0    
Other                   0 0
Net cash used in investing activities                 (250,771) (283,026) (119,083)
Cash flows from financing activities:                      
Proceeds from Revolving Credit Facilities                 153,000 275,000 78,000
Principal payments on Revolving Credit Facilities                 (12,500) (35,000) 0
Repurchase of senior unsecured notes                 0 0  
Proceeds from issuance of senior unsecured notes                   0  
Deferred financing costs                 (973) (966) (2,137)
Proceeds from sale of common stock, net of offering costs                     0
Proceeds from sale of Oasis Midstream common units, net of offering costs                   44,503 134,185
Purchases of treasury stock                 0 0 0
Distributions to non-controlling interests                 (95,771) (128,903)  
Investment in subsidiaries / capital contributions from parent                   (72,186)  
Investment in subsidiaries / capital contributions from parent                 (47,529)   (132,083)
Payments on finance lease liabilities                 (59)    
Other                 (417) 0 0
Net cash provided by (used in) financing activities                 (4,249) 82,448 77,965
Increase (decrease) in cash and cash equivalents                 (2,481) 5,766 883
Beginning of period       $ 6,649       $ 883 6,649 883 0
End of period $ 4,168       $ 6,649       $ 4,168 $ 6,649 $ 883