Fair Value Measurement (Details) - Disposal Group, Held-for-sale, Not Discontinued Operations - USD ($) $ in Thousands |
3 Months Ended | ||
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Mar. 31, 2018 |
Dec. 31, 2017 |
Mar. 31, 2017 |
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| Shipyard Division Assets | |||
| Long Lived Assets Held-for-sale [Line Items] | |||
| Impairment of assets held for sale | $ 600 | $ 389 | |
| Texas North Yard | |||
| Long Lived Assets Held-for-sale [Line Items] | |||
| Impairment of real estate | $ 5,100 | ||
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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 The charge against earnings in the period to reduce the carrying amount of real property to fair value. 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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