Annual report pursuant to Section 13 and 15(d)

Credit Facilities - Additional Information (Details)

v3.23.1
Credit Facilities - Additional Information (Details) - USD ($)
12 Months Ended
Jul. 28, 2021
Dec. 31, 2022
Dec. 31, 2021
Apr. 17, 2020
Line Of Credit Facility [Line Items]        
Maturity date   Jun. 30, 2023    
Gain on extinguishment of debt     $ 9,061,000  
Surety bonds   $ 121,100,000    
Surety bonds relates to Active Retained Shipyard Contracts   55,800,000    
Surety bonds subject to dispute   $ 50,000,000.0    
Short-term Premium Finance Arrangement        
Line Of Credit Facility [Line Items]        
Stated interest rate (percentage)   4.30%    
Short-term premium finance   $ 2,400,000    
short-term premium finance , Number of installment   payable in ten equal monthly installments    
Principal payments   $ 1,700,000    
Remaining principal balance   700,000    
Fabrication        
Line Of Credit Facility [Line Items]        
Surety bonds subject to dispute   15,300,000    
Maximum        
Line Of Credit Facility [Line Items]        
Letter of credit facility   $ 20,000,000.0    
LC Facility        
Line Of Credit Facility [Line Items]        
Fees on undrawn borrowings (percentage)   0.40%    
Total outstanding letters of credit   $ 1,600,000    
Letter of Credit        
Line Of Credit Facility [Line Items]        
Stated interest rate (percentage)   1.50%    
PPP Loan        
Line Of Credit Facility [Line Items]        
Unsecured loan amount       $ 10,000,000.0
Loan payments $ 9,100,000      
Gain on extinguishment of debt     $ 9,100,000  
PPP Loan threshold requiring an audit by the SBA       $ 2,000,000.0