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Revenue from Contracts with Customers - Narrative (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026 USD ($) project	Jun. 30, 2025 USD ($) project	Jun. 30, 2026 USD ($) project	Jun. 30, 2025 USD ($) project	Dec. 31, 2025 USD ($)
Property, Plant, and Equipment [Line Items]
Term of revenue contracts			less than two years
Revenue recognized	$ 4.8	$ 8.8	$ 14.2	$ 36.7
Net amount of unresolved change orders and claims	$ 16.4		$ 16.4		$ 13.6
Number of projects with write down | project	0	0	0	0
Number of projects with write ups | project	0	0	0	0
Revision amount for gross profit impact on contract estimates (more than)	$ 1.0	$ 1.0	$ 1.0	$ 1.0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Property, Plant, and Equipment [Line Items]
Revenue, remaining performance obligations, expected timing of satisfaction, period	24 months		24 months
ODR | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-07-01
Property, Plant, and Equipment [Line Items]
Remaining performance obligations, amount	$ 263.2		$ 263.2
Revenue, remaining performance obligations, percentage	69.00%		69.00%
Revenue, remaining performance obligations, expected timing of satisfaction, period	6 months		6 months
ODR | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Property, Plant, and Equipment [Line Items]
Revenue, remaining performance obligations, percentage	33.00%		33.00%
GCR | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-07-01
Property, Plant, and Equipment [Line Items]
Remaining performance obligations, amount	$ 200.1		$ 200.1
Revenue, remaining performance obligations, percentage	57.00%		57.00%
Revenue, remaining performance obligations, expected timing of satisfaction, period	6 months		6 months
GCR | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Property, Plant, and Equipment [Line Items]
Revenue, remaining performance obligations, percentage	17.00%		17.00%

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Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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