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Commitments and Contingencies (Narrative) (Details) - USD ($)
 12 Months Ended
Apr. 24, 2023
Apr. 11, 2022
Dec. 31, 2023
Commitments And Contingencies [Line Items]      
Outstanding performance bonds     $ 960,906,000
Revenue value remaining from outstanding performance bonds     546,759,000
One-time payment amount $ 1,250,000    
Disbursement amount from litigation escrow account 680,000    
Expected funds to be released in connection with pre-purchase construction project $ 800,000    
Benefit in cost of contract revenues     2,410,000
Other income related to settlement     784,000
Proceeds from legal settlements     1,930,000
Litigation settlement amount yet to released     800,000
Indemnification Commitment [Member]      
Commitments And Contingencies [Line Items]      
Aggregate demolition surety performance bond   $ 21,934,000  
Minimum [Member]      
Commitments And Contingencies [Line Items]      
Bids bond range     $ 1,000,000
Warranty periods     1 year
Maximum [Member]      
Commitments And Contingencies [Line Items]      
Bids bond range     $ 10,000,000
Warranty periods     3 years