Subsequent Events (Details) - vessel |
Mar. 31, 2019 |
Dec. 31, 2018 |
|---|---|---|
| Subsequent Events [Abstract] | ||
| Number of multi-purpose service vessels | 2 | 2 |
| X | ||||||||||
- Definition Construction In Progress, Number Of Multi-Purpose Service Vessels No definition available.
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| X | ||||||||||
- References No definition available.
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