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Revenue (Components of Contracts in Progress) (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Accounts Notes And Loans Receivable [Line Items] |  |
Costs and earnings in excess of billings for contracts in progress | $ 1,022 | $ 9,810
Costs and earnings in excess of billings for completed contracts | 67,739 | 58,925
Total contract revenues in excess of billings | 68,761 | 68,735
Current portion of contract revenues in excess of billings | 68,761 | 68,735
Total billings in excess of contract revenues | (18,066) | (29,560)
Costs And Earnings In Excess Of Billings [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Costs and earnings for contracts in progress | 477,609 | 206,330
Amounts billed | (476,587) | (196,520)
Billings In Excess Of Costs And Earnings [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Costs and earnings for contracts in progress | 36,858 | 229,388
Amounts billed | $ (54,924) | $ (258,948)

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