Organization, Business and Basis of Presentation (Details) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($) $ / shares	Sep. 30, 2021 USD ($) $ / shares	Sep. 30, 2022 USD ($) segment $ / shares	Sep. 30, 2021 USD ($) $ / shares
Organization Consolidation and Presentation of Financial Statements [Line Items]
Number of business segments (segment) | segment			2
Foreign currency gains (losses)			$ 0	$ (100)
Revenue recognized, related to change orders and claims included as contract price adjustments			23,900	4,000
Increase (decrease) in operating income	$ 26,975	$ 30,952	78,122	88,028
Increase (decrease) in net income	$ 18,436	$ 23,171	$ 58,808	$ 64,318
Increase (decrease) in diluted earnings per common share (in dollars per share) | $ / shares	$ 1.09	$ 1.35	$ 3.45	$ 3.75
Contracts Accounted for under Percentage of Completion
Organization Consolidation and Presentation of Financial Statements [Line Items]
Increase (decrease) in consolidated gross margin	(0.30%)	1.40%	0.00%	0.40%
Increase (decrease) in operating income	$ (2,400)	$ 8,200	$ 300	$ 7,200
Increase (decrease) in net income	$ (1,700)	$ 5,900	$ 100	$ 5,200
Increase (decrease) in diluted earnings per common share (in dollars per share) | $ / shares	$ (0.10)	$ 0.35	$ 0.01	$ 0.30