Annual report pursuant to Section 13 and 15(d)

Revenue, Contract Assets and Liabilities and Other Contract Matters - Additional Information (Details)

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Revenue, Contract Assets and Liabilities and Other Contract Matters - Additional Information (Details)
$ in Thousands
 1 Months Ended 12 Months Ended
Jan. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Vechicle
Dec. 31, 2020
USD ($)
Vechicle
Long Term Contracts Or Programs Disclosure [Line Items]      
Reduction of estimated contract price for liquidated damages, amount   $ 1,200 $ 600
Asset impairments   $ 22,750 $ 3,310
Hurricane Ida      
Long Term Contracts Or Programs Disclosure [Line Items]      
Date of landfall     Aug. 29, 2021
Impact of Hurricane Ida, description     On August 29, 2021, Hurricane Ida made landfall near Houma, Louisiana as a high-end Category 4 hurricane, with high winds, heavy rains and storm surge causing significant damage and power outages throughout the region. Our F&S Facility did not experience significant flood damage; however, the high winds and heavy rain damaged multiple buildings and equipment and resulted in significant debris throughout the facility. As a result of the power outages, damage to buildings and debris, the operations at our F&S Facility were temporarily suspended and we immediately commenced cleanup and restoration efforts. While cleanup and restoration efforts are ongoing, we recommenced our operations before the end of the third quarter 2021.
Hurricane Laura      
Long Term Contracts Or Programs Disclosure [Line Items]      
Date of landfall   Aug. 27, 2020  
Total charges related to deductibles   $ 800  
Impact of Hurricane Laura, description   On August 27, 2020, Hurricane Laura made landfall near Lake Charles, Louisiana as a high-end Category 4 hurricane, with high winds and flooding causing significant damage throughout the region. At our Lake Charles Facility the storm damaged warehouses and bulkheads, resulting in charges of $0.8 million related to deductibles associated with our insurance coverages and our estimates of costs associated with uninsurable damage, primarily for bulkheads.  
Marine Docking Structures, Offshore Modules and Material Supply Projects      
Long Term Contracts Or Programs Disclosure [Line Items]      
Change in estimated margins   $ 3,300  
Seventy-Vehicle Ferry      
Long Term Contracts Or Programs Disclosure [Line Items]      
Change in estimated margins   $ 4,100 $ 1,100
Projects, percent complete (percentage)   82.00%  
Reserve for loss   $ 900 500
Forty-Vehicle Ferry      
Long Term Contracts Or Programs Disclosure [Line Items]      
Change in estimated margins   300 $ 7,200
Reserve for loss   $ 3,000  
Number of vehicle ferry projects | Vechicle   2 2
Forty-Vehicle Ferry Vessel Two      
Long Term Contracts Or Programs Disclosure [Line Items]      
Change in estimated margins     $ 1,000
Projects, percent complete (percentage)   96.00%  
Current estimate of costs to repair damage   $ 400  
Deductible associated with insurance coverage for incident   $ 100  
Forty-Vehicle Ferry Vessel Two | Subsequent Event      
Long Term Contracts Or Programs Disclosure [Line Items]      
Current estimate of costs to repair damage $ 900    
Forty-Vehicle Ferry Vessel One      
Long Term Contracts Or Programs Disclosure [Line Items]      
Change in estimated margins     6,200
Projects, percent complete (percentage)   66.00%  
Paddlewheel Riverboat and Subsea Components Projects      
Long Term Contracts Or Programs Disclosure [Line Items]      
Change in estimated margins     1,500
Jacket and Deck      
Long Term Contracts Or Programs Disclosure [Line Items]      
Change in estimated margins     1,200
First Forty-Vehicle Ferry Project      
Long Term Contracts Or Programs Disclosure [Line Items]      
Reserve for loss   $ 4,800  
Second Forty-Vehicle Ferry | Hurricane Ida      
Long Term Contracts Or Programs Disclosure [Line Items]      
Total charges related to deductibles   600  
Second Forty-Vehicle Ferry | Hurricane Ida | Minimum      
Long Term Contracts Or Programs Disclosure [Line Items]      
Charges related to deductibles with insurance coverages   500  
Second Forty-Vehicle Ferry | Hurricane Ida | Maximum      
Long Term Contracts Or Programs Disclosure [Line Items]      
Charges related to deductibles with insurance coverages   1,000  
Shipyard      
Long Term Contracts Or Programs Disclosure [Line Items]      
Change in estimated margins   3,800 8,300
F&S      
Long Term Contracts Or Programs Disclosure [Line Items]      
Change in estimated margins   3,300 2,700
Asset impairments     $ 2,500
F&S | Hurricane Ida      
Long Term Contracts Or Programs Disclosure [Line Items]      
Asset impairments   500  
Costs associated with clean-up and expediting activities   4,800  
Charges associated with deductibles and estimated unrecoverable amounts   3,200  
Recorded insurance recoveries   1,600  
Advance payment from insurance carriers associated with insurance policies   $ (1,000)