| Commitments and Contingencies - Additional Information (Details) $ in Millions | 3 Months Ended | ||
|---|---|---|---|
| Mar. 31, 2018  USD ($)  vessel | Sep. 30, 2021  USD ($) | Dec. 31, 2020  USD ($) | |
| Loss Contingencies [Line Items] | |||
| Number of multi-purpose service vessels | vessel | 2 | ||
| Contract asset under dispute, noncurrent | $ 12.5 | $ 12.5 | |
| Surety Bond | |||
| Loss Contingencies [Line Items] | |||
| Claims under performance bonds issued | $ 50.0 | 
| X | ||||||||||
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- Definition Construction in progress, number of multi-purpose service vessels. No definition available. 
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- Definition Contract asset under dispute noncurrent. No definition available. 
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- Definition Loss contingency under performance bonds issued. No definition available. 
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| X | ||||||||||
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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. No definition available. 
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- Details 
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