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Revenue (Components of Contracts in Progress) (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Accounts Notes And Loans Receivable [Line Items]    
Costs and earnings in excess of billings for contracts in progress $ 47,075 $ 53,725
Costs and earnings in excess of billings for completed contracts 12,107 20,472
Total contract revenues in excess of billings 59,182 74,197
Current portion of contract revenues in excess of billings 59,182 74,197
Total billings in excess of contract revenues (28,756) (25,796)
Costs And Earnings In Excess Of Billings [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Costs and earnings for contracts in progress 231,757 206,933
Amounts billed (184,682) (153,208)
Billings In Excess Of Costs And Earnings [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Costs and earnings for contracts in progress 470,760 278,014
Amounts billed $ (499,516) $ (303,810)