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Equity-Based Compensation - Additional Information (Detail) $ / shares in Units, $ in Thousands |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Oct. 19, 2017 shares | May 22, 2017 | Sep. 30, 2017 shares | Dec. 31, 2017 USD ($) day $ / shares shares | Dec. 31, 2016 USD ($) $ / shares | Dec. 31, 2015 USD ($) $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of shares available for grant (in shares) |  |  |  | 16,050,000 |  |
Stock-based compensation expense | $ |  |  |  | $ 26,534 | $ 24,103 | $ 25,272
Associated tax benefit | $ |  |  |  | $ 6,300 | 8,300 | 8,700
Restricted stock awards |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Vesting period |  |  |  | 3 years |  |
Stock-based compensation expense | $ |  |  |  | $ 19,500 | 20,000 | 21,400
Fair value of awards vested | $ |  |  |  | $ 22,000 | $ 6,900 | $ 9,500
PSUs that vested in period (shares) |  |  |  | 1,676,735 |  |
Weighted average grant date fair value of awards granted (in dollars per share) | $ / shares |  |  |  | $ 15.03 | $ 5.63 | $ 14.28
Unrecognized expense | $ |  |  |  | $ 23,200 |  |
Unrecognized expense recognition period |  |  |  | 1 year 10 months 24 days |  |
Restricted unit awards granted (shares) |  |  |  | 1,639,560 |  |
Performance share unit awards |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Stock-based compensation expense | $ |  |  |  | $ 6,700 | $ 4,200 | $ 3,900
Fair value of awards vested | $ |  |  |  |  | $ 1,000 | $ 800
PSUs that vested in period (shares) |  |  |  | 0 |  |
Weighted average grant date fair value of awards granted (in dollars per share) | $ / shares |  |  |  | $ 16.89 | $ 3.00 | $ 11.20
Unrecognized expense | $ |  |  |  | $ 7,600 |  |
Unrecognized expense recognition period |  |  |  | 2 years 7 months 6 days |  |
Right to received shares of common stock |  |  |  | 1 |  |
Grant date fair value amortization term |  |  |  |  | 4 years | 4 years
Number of trading days | day |  |  |  | 30 |  |
Restricted unit awards granted (shares) |  |  |  | 509,800 |  |
Performance share unit awards | Minimum |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
PSU granted percentage of earnings |  |  |  | 0.00% |  |
Grant date fair value amortization term |  |  |  | 2 years |  |
Performance share unit awards | Maximum |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
PSU granted percentage of earnings |  |  |  | 200.00% |  |
Grant date fair value amortization term |  |  |  | 4 years |  |
Restricted unit awards |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Stock-based compensation expense | $ |  |  |  | $ 100 |  |
PSUs that vested in period (shares) |  |  |  | 0 |  |
Weighted average grant date fair value of awards granted (in dollars per share) | $ / shares |  |  |  | $ 17.00 |  |
Unrecognized expense | $ |  |  |  | $ 100 |  |
Unrecognized expense recognition period |  |  |  | 8 months 12 days |  |
Restricted unit awards granted (shares) |  |  |  | 11,766 |  |
Phantom units |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
PSUs that vested in period (shares) |  |  |  | 0 |  |
Weighted average grant date fair value of awards granted (in dollars per share) | $ / shares |  |  |  | $ 16.40 |  |
Restricted unit awards granted (shares) |  |  |  | 101,500 |  |
OMP [Member] | Restricted unit awards |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Restricted unit awards granted (shares) |  |  | 11,766 |  |  |
Vesting period |  | 10 years |  |  |  |
Long Term Incentive Plan (LTIP) | OMP [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of shares available for grant (in shares) |  |  |  | 1,842,500 |  |
Long Term Incentive Plan (LTIP) | OMP [Member] | Restricted unit awards |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Vesting period |  |  | 1 year |  |  |
Long Term Incentive Plan (LTIP) | Oasis Midstream Partners, LP [Member] | Phantom units |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Unrecognized expense recognition period |  |  |  | 2 years 9 months 18 days |  |
Restricted unit awards granted (shares) | 101,500 |  |  |  |  |
Vesting period | 3 years |  |  |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options | $ |  |  |  | $ 1,600 |  |

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- Definition Unrecognized cost of unvested share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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