Commitments and Contingencies - Narrative (Details) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
|
Jun. 30, 2019
USD ($)
vessel
|
Jun. 30, 2019
USD ($)
vessel
|
Dec. 31, 2018
USD ($)
vessel
|
Mar. 31, 2018
vessel
|
|
| Commitments and Contingencies Disclosure [Abstract] | ||||
| Number of multi-purpose service vessels | vessel | 2 | 2 | 2 | 2 |
| Net contract asset | $ 12.5 | $ 12.5 | $ 12.5 | |
| Operating lease, term of contract | 15 years 11 months 16 days | 15 years 11 months 16 days | ||
| Operating lease, weighted-average discount rate (percentage) | 7.50% | 7.50% | ||
| Operating lease payments | $ 0.2 | $ 0.3 |
| X | ||||||||||
- Definition Construction In Progress, Number Of Multi-Purpose Service Vessels No definition available.
|
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Discount rate used by lessee to determine present value of operating lease payments. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Reflects the estimated amount of loss from the specified contingency as of the balance sheet date. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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