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Revenue (Summary of Gross Profit from Foreign Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation Of Revenue [Line Items]
Contract revenues	$ 762,693	$ 589,625	$ 648,781
Costs of contract revenues	(602,117)	(511,893)	(617,608)
Gross profit	160,576	77,732	31,173
Foreign [Member]
Disaggregation Of Revenue [Line Items]
Contract revenues			149
Costs of contract revenues	(1,808)	(1,142)	(341)
Gross profit	$ (1,808)	$ (1,142)	$ (192)

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