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Equity-Based Compensation - Additional Information (Detail) |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Jan. 01, 2019 shares | Oct. 19, 2017 | May 22, 2017 | Dec. 31, 2018 USD ($) day $ / shares shares | Dec. 31, 2017 USD ($) $ / shares shares | Dec. 31, 2016 USD ($) $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of shares available for grant (in shares) | shares |  |  |  | 16,050,000 |  |
Stock-based compensation expense |  |  |  | $ 29,273,000 | $ 26,534,000 | $ 24,103,000
Associated tax benefit |  |  |  | $ 6,800,000 | 6,300,000 | 8,300,000
Restricted stock awards |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Vesting period |  |  |  | 3 years |  |
Stock-based compensation expense |  |  |  | $ 20,100,000 | 19,500,000 | 20,000,000
Fair value of awards vested |  |  |  | $ 17,300,000 | $ 22,000,000 | $ 6,900,000
Weighted average grant date fair value of awards granted (in dollars per share) | $ / shares |  |  |  | $ 10.20 | $ 15.03 | $ 5.63
Unrecognized expense |  |  |  | $ 34,200,000 |  |
Unrecognized expense recognition period |  |  |  | 1 year 11 months 15 days |  |
PSUs that vested in period (shares) | shares |  |  |  | 1,826,855 |  |
Performance share unit awards |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Stock-based compensation expense |  |  |  | $ 8,500,000 | $ 6,700,000 | $ 4,200,000
Fair value of awards vested |  |  |  | $ 5,300,000 |  | $ 1,000,000
Weighted average grant date fair value of awards granted (in dollars per share) | $ / shares |  |  |  | $ 12.71 | $ 16.89 | $ 3.00
Unrecognized expense |  |  |  | $ 10,000,000 |  |
Unrecognized expense recognition period |  |  |  | 2 years 9 months 18 days |  |
Right to received shares of common stock | shares |  |  |  | 1 |  |
PSUs that vested in period (shares) | shares |  |  |  | 564,068 | 0 |
Number of trading days | day |  |  |  | 30 |  |
Performance share unit awards | Minimum |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
PSU granted percentage of earnings |  |  |  | 0.00% |  |
Performance share unit awards | Maximum |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
PSU granted percentage of earnings |  |  |  | 200.00% |  |
Restricted unit awards |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Weighted average grant date fair value of awards granted (in dollars per share) | $ / shares |  |  |  | $ 17.55 |  |
Unrecognized expense |  |  |  | $ 100,000 |  |
Unrecognized expense recognition period |  |  |  | 5 months 5 days |  |
PSUs that vested in period (shares) | shares |  |  |  | 11,766 |  |
Phantom units |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Weighted average grant date fair value of awards granted (in dollars per share) | $ / shares |  |  |  | $ 23.91 |  |
PSUs that vested in period (shares) | shares |  |  |  | 29,254 |  |
OMP | Restricted unit awards |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Stock-based compensation expense |  |  |  | $ 400,000 | $ 100,000 |
Weighted average grant date fair value of awards granted (in dollars per share) | $ / shares |  |  |  |  | $ 17.00 |
Vesting period |  |  | 10 years |  |  |
Oasis Midstream Partners, LP | Restricted unit awards |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Fair value of awards vested |  |  |  | 300,000 |  |
Oasis Midstream Partners, LP | Phantom units |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Stock-based compensation expense |  |  |  | 500,000 | $ 100,000 |
Fair value of awards vested |  |  |  | $ 600,000 | $ 0 | $ 0
Weighted average grant date fair value of awards granted (in dollars per share) | $ / shares |  |  |  | $ 16.40 | $ 16.40 |
OMP LTIP |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Common units reserved for future issuance | shares |  |  |  | 2,117,618 |  |
Long Term Incentive Plan (LTIP) | 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 | Phantom units |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Unrecognized expense recognition period |  |  |  | 2 years 4 months 2 days |  |
Vesting period |  | 3 years |  |  |  |
Unrecognized compensation cost |  |  |  | $ 2,100,000 |  |
Subsequent Event | OMP LTIP |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized | shares | 337,790 |  |  |  |  |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=109197908&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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=109197908&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://fasb.org/us-gaap/role/ref/legacyRef -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=109197908&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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=109197908&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://fasb.org/us-gaap/role/ref/legacyRef -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=109197908&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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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