Revenue from Contracts with Customers - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
Unexecuted change orders	$ 37,800		$ 37,800		$ 57,300
Change orders not approved by the customer	233,100		233,100		187,400
Claim position	42,700		42,700		42,700
Loss provision	1,184		1,184		1,545
Remaining outstanding billings on large project	31,200		31,200
Operating revenue recognized	47,400	$ 6,300	167,000	$ 162,600
Net increase in revenues from performance obligations satisfied in prior periods	25,800	$ 20,200	71,500	$ 41,400
Remaining performance obligation	2,880,000		2,880,000		2,010,000
Retention receivables	$ 100,100		$ 100,100		$ 105,800
Percentage of retainage outstanding expected to be collected within the next twelve months	67.00%		67.00%