Revenue from Contracts with Customers - Narrative (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($) project	Sep. 30, 2024 USD ($) project	Sep. 30, 2025 USD ($) project	Sep. 30, 2024 USD ($) project	Dec. 31, 2024 USD ($)
Property, Plant and Equipment [Line Items]
Term of revenue contracts			three months to two years
Percentage completed of certain milestones			10.00%
Net amount of unresolved change orders and claims	$ 10.4		$ 10.4		$ 10.9
Number of projects with write ups | project	0	0	2
Number of projects with write down | project	0	0
Revision amount for gross profit impact on contract estimates (more than)	$ 0.5	$ 0.5	$ 0.5
Gross profit write ups			$ 1.5
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Property, Plant and Equipment [Line Items]
Revenue, remaining performance obligations, expected timing of satisfaction, period	24 months		24 months
ODR
Property, Plant and Equipment [Line Items]
Number of projects with write ups | project				4
Gross profit write ups				$ 3.9
ODR | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01
Property, Plant and Equipment [Line Items]
Remaining performance obligations, amount	$ 221.0		$ 221.0
Revenue, remaining performance obligations, percentage	45.00%		45.00%
Revenue, remaining performance obligations, expected timing of satisfaction, period	3 months		3 months
ODR | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Property, Plant and Equipment [Line Items]
Revenue, remaining performance obligations, percentage	55.00%		55.00%
GCR
Property, Plant and Equipment [Line Items]
Number of projects with write ups | project				2
Number of projects with write down | project				1
Revision amount for gross profit impact on contract estimates (more than)				$ 0.5
Gross profit write ups				1.5
Contract with customer, total gross profits adjustments, write down				$ 0.6
GCR | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01
Property, Plant and Equipment [Line Items]
Remaining performance obligations, amount	$ 121.2		$ 121.2
Revenue, remaining performance obligations, percentage	31.00%		31.00%
Revenue, remaining performance obligations, expected timing of satisfaction, period	3 months		3 months
GCR | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Property, Plant and Equipment [Line Items]
Revenue, remaining performance obligations, percentage	69.00%		69.00%