Revenue from Contracts with Customers - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Revenue from Contract with Customer [Abstract]
Unexecuted change orders	$ 67,400		$ 67,400		$ 56,200
Loss provision	2,570		2,570		1,021
Claim position	34,400		34,400		54,900
Remaining outstanding billings on large project	31,300		31,300
Net increase in revenues from performance obligations satisfied in prior periods	51,600	$ 25,800	102,200	$ 71,500
Positive net impact on net income from previous performance obligations	$ 37,900	$ 19,400	$ 74,800	$ 53,100
Positive net impact on diluted earnings per share from previous performance obligations (in dollars per share)	$ 0.74	$ 0.38	$ 1.46	$ 1.04
Increase in net income	$ 15,400	$ 3,700	$ 34,000	$ 15,100
Increase in gross profit	$ 21,000	$ 4,900	$ 46,400	$ 20,400
Increase in diluted earnings per share (in dollars per share)	$ 0.30	$ 0.07	$ 0.67	$ 0.30
Contract with customer, liability, revenue recognized	$ 12,700	$ 46,600	$ 146,400	$ 136,500
Remaining performance obligation	$ 2,690,000		$ 2,690,000		$ 2,460,000