Fair Value Measurement - Property, Plant, and Equipment Reclassified (Details) - USD ($) |
9 Months Ended | |
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Sep. 30, 2017 |
Dec. 31, 2016 |
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| Long Lived Assets Held-for-sale [Line Items] | ||
| Assets held-for-sale | $ 0 | |
| Prospect Shipyard | Disposal Group, Held-for-sale, Not Discontinued Operations | ||
| Long Lived Assets Held-for-sale [Line Items] | ||
| Impairment of assets held for sale | $ 389,000 |
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- Definition Amount of assets held-for-sale that are not part of a disposal group. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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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