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Income Taxes - Components of Company's Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | --- | ---
Deferred tax assets: |  |  |  |
Vessels and equipment | $ 437 | $ 21,837 |  |
Tax losses carried forward | 115,564 | 98,558 |  |
Other | 7,166 | 5,094 |  |
Total deferred tax assets | 123,167 | 125,489 |  |
Deferred tax liabilities: |  |  |  |
Other | 76 | 407 |  |
Total deferred tax liabilities | 195 | 776 |  |
Net Deferred Tax Assets Before Deducting Valuation Allowance | 122,972 | 124,713 |  |
Valuation allowance | (120,810) | (123,461) |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Freight tax provisions (note 17) | 47,813 | 42,477 | $ 46,956 | $ 51,562
Net Deferred Tax Assets Before Deducting Valuation Allowance | 122,972 | 124,713 |  |
Net deferred tax assets | 2,162 | 1,252 |  |
Deferred Tax Liabilities, Property, Plant and Equipment | 32 | 369 |  |
deferred tax liability, Provisions | 87 | $ 0 |  |
Norway |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Tax losses and disallowed finance costs | $ 12,600 |  |  |

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