Revenue from Contracts with Customers - Schedule of Cumulative Catch-Up Adjustment (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
UNITED STATES
Cumulative Catch-Up Adjustment [Line Items]
Change in total estimated cost or anticipated contract value	$ 37,409,000	$ 35,465,000	$ 47,130,000	$ 50,351,000
UNITED STATES \| United States Electrical Construction And Facilities Services [Member]
Cumulative Catch-Up Adjustment [Line Items]
Change in total estimated cost or anticipated contract value	14,193,000	14,878,000	20,562,000	24,520,000
UNITED STATES \| United States Mechanical Construction And Facilities Services [Member]
Cumulative Catch-Up Adjustment [Line Items]
Change in total estimated cost or anticipated contract value	20,957,000	20,587,000	23,101,000	25,831,000
UNITED STATES \| United States Building Services [Member]
Cumulative Catch-Up Adjustment [Line Items]
Change in total estimated cost or anticipated contract value	$ 2,259,000	$ 0	3,467,000	$ 0
Minimum [Member]
Cumulative Catch-Up Adjustment [Line Items]
Change in total estimated cost or anticipated contract value			$ 1,000,000.0