Quarterly report pursuant to Section 13 or 15(d)

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

v3.22.2.2
Revenue, Contract Assets and Liabilities and Other Contract Matters - Additional Information (Details)
$ in Millions
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2022
USD ($)
Jun. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Sep. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
Vechicle
Long Term Contracts Or Programs Disclosure [Line Items]              
Change in estimated margins         $ 3.3    
Insurance payments received   $ 7.0       $ 1.0  
Charges associated with insurance recoveries of storm           3.2  
Gain on insurance recovery $ 4.4            
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, including our Houma Facilities and operations. Our Houma Facilities 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.      
Insurance payments received 1.4            
Gain on insurance recovery       $ 1.3      
Insurance receivables 1.5     1.5      
Hurricane Ida | Minimum              
Long Term Contracts Or Programs Disclosure [Line Items]              
Future repair costs associated with insurance payments received for buildings       1.0      
Hurricane Ida | Maximum              
Long Term Contracts Or Programs Disclosure [Line Items]              
Future repair costs associated with insurance payments received for buildings       1.5      
Forty-Vehicle Ferry              
Long Term Contracts Or Programs Disclosure [Line Items]              
Number of vehicle ferry projects with rework and construction challenges. | Vechicle             2
Reserve for loss $ 1.2     $ 1.2      
Forty-Vehicle Ferry Vessel Two              
Long Term Contracts Or Programs Disclosure [Line Items]              
Projects, percent complete (percentage) 96.00%     96.00%      
Forty-Vehicle Ferry Vessel One              
Long Term Contracts Or Programs Disclosure [Line Items]              
Projects, percent complete (percentage) 87.00%     87.00%      
Offshore Modules, Material Supply and Subsea Structures Projects              
Long Term Contracts Or Programs Disclosure [Line Items]              
Change in estimated margins     $ 1.1   $ 3.7    
Seventy-Vehicle Ferry              
Long Term Contracts Or Programs Disclosure [Line Items]              
Projects, percent complete (percentage)     94.00%   94.00%    
Reserve for loss     $ 0.3   $ 0.3    
Change in estimated margins     1.7        
Second Forty-Vehicle Ferry              
Long Term Contracts Or Programs Disclosure [Line Items]              
Total charges related to deductibles       $ 0.2      
Charges related to deductibles with insurance coverages       0.5      
Shipyard              
Long Term Contracts Or Programs Disclosure [Line Items]              
Reduction of estimated contract price for liquidated damages, amount $ 1.0     $ 1.0   $ 1.2  
Change in estimated margins     1.3   3.0    
Fabrication              
Long Term Contracts Or Programs Disclosure [Line Items]              
Change in estimated margins     1.1   3.7    
Fabrication | Forty Vehicle Ferry Projects              
Long Term Contracts Or Programs Disclosure [Line Items]              
Change in estimated margins     $ 0.4   $ 0.3