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Condensed Consolidating Financial Statements - Schedule of Condensed Consolidating Balance Sheet (Detail) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | --- | --- | ---
Current assets |  |  |  |
Cash and cash equivalents | $ 16,720 | $ 11,226 | $ 9,730 | $ 45,811
Accounts receivable, net | 363,580 | 204,335 |  |
Accounts receivable – affiliates | 0 | 0 |  |
Inventory | 19,367 | 10,648 |  |
Prepaid expenses | 7,631 | 7,623 |  |
Derivative instruments | 344 | 362 |  |
Other current assets | 193 | 4,355 |  |
Total current assets | 407,835 | 238,549 |  |
Property, plant and equipment |  |  |  |
Oil and gas properties (successful efforts method) | 7,838,955 | 7,296,568 |  |
Other property and equipment | 868,746 | 618,790 |  |
Less: accumulated depreciation, depletion, amortization and impairment | (2,534,215) | (1,995,791) |  |
Total property, plant and equipment, net | 6,173,486 | 5,919,567 | 5,218,242 |
Investments in and advances to subsidiaries | 0 | 0 |  |
Derivative instruments | 9 | 0 |  |
Deferred income taxes | 0 | 0 |  |
Long-term inventory | 12,200 | 0 |  |
Other assets | 21,600 | 20,516 |  |
Total assets | 6,615,130 | 6,178,632 | 5,649,375 |
Current liabilities |  |  |  |
Accounts payable | 13,370 | 4,645 |  |
Accounts payable - affiliates | 0 | 0 |  |
Revenues and production taxes payable | 213,995 | 139,737 |  |
Accrued liabilities | 236,480 | 119,173 |  |
Accrued interest payable | 38,963 | 39,004 |  |
Derivative instruments | 115,716 | 60,469 |  |
Advances from joint interest partners | 4,916 | 7,597 |  |
Other current liabilities | 40 | 10,490 |  |
Total current liabilities | 623,480 | 381,115 |  |
Long-term debt | 2,097,606 | 2,297,214 |  |
Deferred income taxes | 305,921 | 513,529 |  |
Asset retirement obligations | 48,511 | 48,985 |  |
Derivative instruments | 19,851 | 11,714 |  |
Other liabilities | 6,182 | 2,918 |  |
Total liabilities | 3,101,551 | 3,255,475 |  |
Stockholders’ equity |  |  |  |
Capital contributions from affiliates | 0 | 0 |  |
Common stock, $0.01 par value: 450,000,000 shares authorized; 270,627,014 shares issued and 269,295,466 shares outstanding at December 31, 2017 and 237,201,064 shares issued and 236,344,172 shares outstanding at December 31, 2016 | 2,668 | 2,331 |  |
Treasury stock, at cost: 1,331,548 and 856,892 shares at December 31, 2017 and December 31, 2016, respectively | (22,179) | (15,950) |  |
Additional paid-in capital | 2,677,217 | 2,345,271 |  |
Retained earnings | 717,985 | 591,505 |  |
Oasis share of stockholders’ equity | 3,375,691 | 2,923,157 |  |
Non-controlling interests | 137,888 | 0 |  |
Total stockholders’ equity | 3,513,579 | 2,923,157 | 2,319,342 | 1,872,301
Total liabilities and stockholders’ equity | 6,615,130 | 6,178,632 |  |
Intercompany Eliminations |  |  |  |
Current assets |  |  |  |
Cash and cash equivalents | 0 | 0 | 0 | 0
Accounts receivable, net | 0 | 0 |  |
Accounts receivable – affiliates | (557,506) | (279,619) |  |
Inventory | 0 | 0 |  |
Prepaid expenses | 0 | 0 |  |
Derivative instruments | 0 | 0 |  |
Other current assets | 0 | 0 |  |
Total current assets | (557,506) | (279,619) |  |
Property, plant and equipment |  |  |  |
Oil and gas properties (successful efforts method) | (1,966) | 0 |  |
Other property and equipment | 0 | 0 |  |
Less: accumulated depreciation, depletion, amortization and impairment | 0 | 0 |  |
Total property, plant and equipment, net | (1,966) | 0 |  |
Investments in and advances to subsidiaries | (5,213,108) | (4,451,192) |  |
Derivative instruments | 0 |  |  |
Deferred income taxes | (183,568) | (220,058) |  |
Long-term inventory | 0 |  |  |
Other assets | 0 | 0 |  |
Total assets | (5,956,148) | (4,950,869) |  |
Current liabilities |  |  |  |
Accounts payable | 0 | 0 |  |
Accounts payable - affiliates | (557,506) | (279,619) |  |
Revenues and production taxes payable | 0 | 0 |  |
Accrued liabilities | 0 | 0 |  |
Accrued interest payable | 0 | 0 |  |
Derivative instruments | 0 | 0 |  |
Advances from joint interest partners | 0 | 0 |  |
Other current liabilities | 0 | 0 |  |
Total current liabilities | (557,506) | (279,619) |  |
Long-term debt | 0 | 0 |  |
Deferred income taxes | (183,568) | (220,058) |  |
Asset retirement obligations | 0 | 0 |  |
Derivative instruments | 0 | 0 |  |
Other liabilities | 0 | 0 |  |
Total liabilities | (741,074) | (499,677) |  |
Stockholders’ equity |  |  |  |
Capital contributions from affiliates | (3,499,626) | (3,388,893) |  |
Common stock, $0.01 par value: 450,000,000 shares authorized; 270,627,014 shares issued and 269,295,466 shares outstanding at December 31, 2017 and 237,201,064 shares issued and 236,344,172 shares outstanding at December 31, 2016 | 0 | 0 |  |
Treasury stock, at cost: 1,331,548 and 856,892 shares at December 31, 2017 and December 31, 2016, respectively | 0 | 0 |  |
Additional paid-in capital | (8,922) | (8,743) |  |
Retained earnings | (1,393,080) | (1,053,556) |  |
Oasis share of stockholders’ equity | (4,901,628) | (4,451,192) |  |
Non-controlling interests | (313,446) |  |  |
Total stockholders’ equity | (5,215,074) |  |  |
Total liabilities and stockholders’ equity | (5,956,148) | (4,950,869) |  |
Parent/ Issuer |  |  |  |
Current assets |  |  |  |
Cash and cash equivalents | 178 | 166 | 777 | 776
Accounts receivable, net | 0 | 0 |  |
Accounts receivable – affiliates | 425,668 | 252,000 |  |
Inventory | 0 | 0 |  |
Prepaid expenses | 267 | 275 |  |
Derivative instruments | 0 | 0 |  |
Other current assets | 0 | 0 |  |
Total current assets | 426,113 | 252,441 |  |
Property, plant and equipment |  |  |  |
Oil and gas properties (successful efforts method) | 0 | 0 |  |
Other property and equipment | 0 | 0 |  |
Less: accumulated depreciation, depletion, amortization and impairment | 0 | 0 |  |
Total property, plant and equipment, net | 0 | 0 |  |
Investments in and advances to subsidiaries | 4,790,976 | 4,451,192 |  |
Derivative instruments | 0 |  |  |
Deferred income taxes | 183,568 | 220,058 |  |
Long-term inventory | 0 |  |  |
Other assets | 0 | 0 |  |
Total assets | 5,400,657 | 4,923,691 |  |
Current liabilities |  |  |  |
Accounts payable | 0 | 0 |  |
Accounts payable - affiliates | 34,382 | 27,619 |  |
Revenues and production taxes payable | 0 | 0 |  |
Accrued liabilities | 216 | 12 |  |
Accrued interest payable | 38,796 | 38,689 |  |
Derivative instruments | 0 | 0 |  |
Advances from joint interest partners | 0 | 0 |  |
Other current liabilities | 0 | 0 |  |
Total current liabilities | 73,394 | 66,320 |  |
Long-term debt | 1,949,606 | 1,934,214 |  |
Deferred income taxes | 0 | 0 |  |
Asset retirement obligations | 0 | 0 |  |
Derivative instruments | 0 | 0 |  |
Other liabilities | 0 | 0 |  |
Total liabilities | 2,023,000 | 2,000,534 |  |
Stockholders’ equity |  |  |  |
Capital contributions from affiliates | 0 | 0 |  |
Common stock, $0.01 par value: 450,000,000 shares authorized; 270,627,014 shares issued and 269,295,466 shares outstanding at December 31, 2017 and 237,201,064 shares issued and 236,344,172 shares outstanding at December 31, 2016 | 2,668 | 2,331 |  |
Treasury stock, at cost: 1,331,548 and 856,892 shares at December 31, 2017 and December 31, 2016, respectively | (22,179) | (15,950) |  |
Additional paid-in capital | 2,677,217 | 2,345,271 |  |
Retained earnings | 719,951 | 591,505 |  |
Oasis share of stockholders’ equity | 3,377,657 | 2,923,157 |  |
Non-controlling interests | 0 |  |  |
Total stockholders’ equity | 3,377,657 |  |  |
Total liabilities and stockholders’ equity | 5,400,657 | 4,923,691 |  |
Combined Guarantor Subsidiaries |  |  |  |
Current assets |  |  |  |
Cash and cash equivalents | 15,659 | 11,060 | $ 8,953 | $ 45,035
Accounts receivable, net | 362,746 | 204,335 |  |
Accounts receivable – affiliates | 46,020 | 27,619 |  |
Inventory | 19,367 | 10,648 |  |
Prepaid expenses | 6,586 | 7,348 |  |
Derivative instruments | 344 | 362 |  |
Other current assets | 193 | 4,355 |  |
Total current assets | 450,915 | 265,727 |  |
Property, plant and equipment |  |  |  |
Oil and gas properties (successful efforts method) | 7,840,921 | 7,296,568 |  |
Other property and equipment | 214,818 | 618,790 |  |
Less: accumulated depreciation, depletion, amortization and impairment | (2,499,867) | (1,995,791) |  |
Total property, plant and equipment, net | 5,555,872 | 5,919,567 |  |
Investments in and advances to subsidiaries | 422,132 | 0 |  |
Derivative instruments | 9 |  |  |
Deferred income taxes | 0 | 0 |  |
Long-term inventory | 12,200 |  |  |
Other assets | 19,587 | 20,516 |  |
Total assets | 6,460,715 | 6,205,810 |  |
Current liabilities |  |  |  |
Accounts payable | 13,370 | 4,645 |  |
Accounts payable - affiliates | 511,486 | 252,000 |  |
Revenues and production taxes payable | 213,995 | 139,737 |  |
Accrued liabilities | 177,446 | 119,161 |  |
Accrued interest payable | 53 | 315 |  |
Derivative instruments | 115,716 | 60,469 |  |
Advances from joint interest partners | 4,916 | 7,597 |  |
Other current liabilities | 40 | 10,490 |  |
Total current liabilities | 1,037,022 | 594,414 |  |
Long-term debt | 70,000 | 363,000 |  |
Deferred income taxes | 489,489 | 733,587 |  |
Asset retirement obligations | 47,195 | 48,985 |  |
Derivative instruments | 19,851 | 11,714 |  |
Other liabilities | 6,182 | 2,918 |  |
Total liabilities | 1,669,739 | 1,754,618 |  |
Stockholders’ equity |  |  |  |
Capital contributions from affiliates | 3,264,691 | 3,388,893 |  |
Common stock, $0.01 par value: 450,000,000 shares authorized; 270,627,014 shares issued and 269,295,466 shares outstanding at December 31, 2017 and 237,201,064 shares issued and 236,344,172 shares outstanding at December 31, 2016 | 0 | 0 |  |
Treasury stock, at cost: 1,331,548 and 856,892 shares at December 31, 2017 and December 31, 2016, respectively | 0 | 0 |  |
Additional paid-in capital | 8,922 | 8,743 |  |
Retained earnings | 1,379,475 | 1,053,556 |  |
Oasis share of stockholders’ equity | 4,653,088 | 4,451,192 |  |
Non-controlling interests | 137,888 |  |  |
Total stockholders’ equity | 4,790,976 |  |  |
Total liabilities and stockholders’ equity | 6,460,715 | 6,205,810 |  |
Combined Non-guarantor Subsidiaries |  |  |  |
Current assets |  |  |  |
Cash and cash equivalents | 883 | $ 0 |  |
Accounts receivable, net | 834 |  |  |
Accounts receivable – affiliates | 85,818 |  |  |
Inventory | 0 |  |  |
Prepaid expenses | 778 |  |  |
Derivative instruments | 0 |  |  |
Other current assets | 0 |  |  |
Total current assets | 88,313 |  |  |
Property, plant and equipment |  |  |  |
Oil and gas properties (successful efforts method) | 0 |  |  |
Other property and equipment | 653,928 |  |  |
Less: accumulated depreciation, depletion, amortization and impairment | (34,348) |  |  |
Total property, plant and equipment, net | 619,580 |  |  |
Investments in and advances to subsidiaries | 0 |  |  |
Derivative instruments | 0 |  |  |
Deferred income taxes | 0 |  |  |
Long-term inventory | 0 |  |  |
Other assets | 2,013 |  |  |
Total assets | 709,906 |  |  |
Current liabilities |  |  |  |
Accounts payable | 0 |  |  |
Accounts payable - affiliates | 11,638 |  |  |
Revenues and production taxes payable | 0 |  |  |
Accrued liabilities | 58,818 |  |  |
Accrued interest payable | 114 |  |  |
Derivative instruments | 0 |  |  |
Advances from joint interest partners | 0 |  |  |
Other current liabilities | 0 |  |  |
Total current liabilities | 70,570 |  |  |
Long-term debt | 78,000 |  |  |
Deferred income taxes | 0 |  |  |
Asset retirement obligations | 1,316 |  |  |
Derivative instruments | 0 |  |  |
Other liabilities | 0 |  |  |
Total liabilities | 149,886 |  |  |
Stockholders’ equity |  |  |  |
Capital contributions from affiliates | 234,935 |  |  |
Common stock, $0.01 par value: 450,000,000 shares authorized; 270,627,014 shares issued and 269,295,466 shares outstanding at December 31, 2017 and 237,201,064 shares issued and 236,344,172 shares outstanding at December 31, 2016 | 0 |  |  |
Treasury stock, at cost: 1,331,548 and 856,892 shares at December 31, 2017 and December 31, 2016, respectively | 0 |  |  |
Additional paid-in capital | 0 |  |  |
Retained earnings | 11,639 |  |  |
Oasis share of stockholders’ equity | 246,574 |  |  |
Non-controlling interests | 313,446 |  |  |
Total stockholders’ equity | 560,020 |  |  |
Total liabilities and stockholders’ equity | $ 709,906 |  |  |

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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(30)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 4.E) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(31)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4I -URI http://asc.fasb.org/extlink&oid=84234705&loc=SL4590271-111686 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=96868048&loc=SL4568740-111683 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=96868048&loc=SL4568447-111683 + Details
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