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Operating Segments - Summarized Segment Financial Information (Parenthetical) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Segment Reporting Information [Line Items] |  |  |  |  |
Asset impairments |  |  | $ 17,223 | $ 4,445 | $ 7,672
Gain on insurance recoveries |  |  |  | 3,571 |
Corporate |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Restructuring costs |  |  | 700 |  |
Fabrication |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Increase in operating loss due to project charges |  |  | 8,400 | 2,400 |
Asset impairments |  |  | 8,700 |  | 6,700
Asset impairments, gains on the sale of assets and insurance proceeds |  |  |  | 8,200 |
Gain on sale of South Texas Properties, net |  |  |  | 8,000 |
Shipyard |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Increase in operating loss due to project charges |  | $ 5,800 | 7,200 | 6,700 | 34,500
Asset impairments |  |  | 7,900 | 1,000 | $ 1,200
Services |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Increase in operating loss due to project charges |  |  | $ 1,600 |  |
Fabrication and Shipyard |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Increase in operating loss due to project charges | $ 13,800 |  |  |  |
Asset impairments |  |  |  | $ 3,400 |

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