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Revenue (Components of Contracts in Progress) (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
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Accounts Notes And Loans Receivable [Line Items] |  |
Costs and earnings in excess of billings for contracts in progress | $ 75,252 | $ 9,810
Costs and earnings in excess of billings for completed contracts | 16,547 | 58,925
Total contract revenues in excess of billings | 91,799 | 68,735
Current portion of contract revenues in excess of billings | 91,799 | 68,735
Total billings in excess of contract revenues | (15,613) | (29,560)
Costs And Earnings In Excess Of Billings [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Costs and earnings for contracts in progress | 306,386 | 206,330
Amounts billed | (231,134) | (196,520)
Billings In Excess Of Costs And Earnings [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Costs and earnings for contracts in progress | 78,932 | 229,388
Amounts billed | $ (94,545) | $ (258,948)

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