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Commitments and Contingencies - Additional Information (Detail) $ in Thousands |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 23, 2017 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Mar. 01, 2019 USD ($) MBbls MMcf | Dec. 31, 2018 MBbls | Dec. 31, 2018 MMcf
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |
Other Commitment |  | $ 627,960 |  |  |  |  |
Rental expense |  | $ 10,600 | $ 6,900 | $ 6,300 |  |  |
Long term commitments |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |
Contract term, maximum |  | 10 years |  |  |  |  |
Crude oil | Long term commitments |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |
Minimum quantity of delivery | MBbls |  |  |  |  |  | 46,100 |
Natural gas | Long term commitments |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |
Minimum quantity of delivery |  |  |  |  |  | 42,800 | 879,500
Fresh Water | Long term commitments |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |
Minimum quantity to be purchased | MBbls |  |  |  |  |  | 28,000 |
Volume Commitment Agreement |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |
Transportation and purchase costs incurred |  | $ 21,100 | $ 14,800 | $ 16,100 |  |  |
Pending Litigation | Mirada Litigation |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |
Damages sought (in excess of) | $ 100,000 |  |  |  |  |  |
Subsequent Event | Crude oil | Long term commitments |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |
Minimum quantity of delivery | MBbls |  |  |  |  | 9,100 |  |
Subsequent Event | Natural gas | Long term commitments |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |
Minimum quantity of delivery | MMcf |  |  |  |  | 200 |  |
Subsequent Event | Fresh Water | Long term commitments |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |
Minimum quantity to be purchased | MBbls |  |  |  |  | 12,000 |  |
Water Volume Commitment Agreements | Subsequent Event |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |
Other Commitment |  |  |  |  | $ 72,900 |  |

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- Definition Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions. + References No definition available. + Details
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