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Summary Of Significant Accounting Policies - Deferred Recertification And Dry Dock Costs (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items] |  |  |
Recertification and dry dock amortization expense | $ 25.7 | $ 14.0 | $ 14.6
Minimum |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Recertification and dry dock amortization period | 24 months |  |
Recertification process period | 1 month |  |
Maximum |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Recertification and dry dock amortization period | 60 months |  |
Recertification process period | 3 months |  |

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- Definition Expense related to amortization of deferred recertification and dry dock costs + References No definition available. + Details
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- Definition The length of time in which the deferred recertification costs (including vessel dry dock costs) are amortized. + References No definition available. + Details
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- Definition The length of time to complete the recertification process (including vessel dry dock). + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 926 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483154/926-20-50-5 + Details
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