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Revenue from Contracts with Customers - Schedule of Performance Obligation Satisfied in Previous Period (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
UNITED STATES
Performance Obligation Satisfied in Previous Period [Line Items]
Performance obligation satisfied in previous period	$ 13,212,000	$ 10,037,000	$ 18,808,000	$ 22,640,000
Change in total estimated cost or anticipated contract value	10,066,000	10,568,000	40,621,000	28,612,000
UNITED STATES | United States Electrical Construction And Facilities Services [Member]
Performance Obligation Satisfied in Previous Period [Line Items]
Performance obligation satisfied in previous period	7,540,000	4,223,000	9,457,000	4,287,000
Change in total estimated cost or anticipated contract value	0	2,635,000	16,758,000	12,219,000
UNITED STATES | United States Mechanical Construction And Facilities Services [Member]
Performance Obligation Satisfied in Previous Period [Line Items]
Performance obligation satisfied in previous period	5,672,000	5,814,000	9,351,000	18,353,000
Change in total estimated cost or anticipated contract value	10,066,000	7,933,000	23,863,000	13,416,000
UNITED STATES | United States Building Services [Member]
Performance Obligation Satisfied in Previous Period [Line Items]
Change in total estimated cost or anticipated contract value	$ 0	$ 0	0	$ 2,977,000
Minimum [Member]
Performance Obligation Satisfied in Previous Period [Line Items]
Performance obligation satisfied in previous period			1,000,000
Change in total estimated cost or anticipated contract value			$ 1,000,000

X

- Definition

Reduction in profit recognized for cumulative catch-up adjustment from change in measure of progress.

+ References

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- Definition

Performance Obligation Satisfied in Previous Period [Line Items]

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- Definition

Amount of revenue recognized from performance obligation satisfied or partially satisfied in previous reporting periods. Includes, but is not limited to, change in transaction price.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-12A

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