Revenue from Contracts with Customers (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Revenue From Contract With Customers [Line Items]
Performance obligation satisfied in previous period	$ 0	$ 0
Change in estimate of transaction price	0	0
Change in total estimated cost	10,000,000	$ 0
Allowance for credit losses	22,956,000		$ 23,534,000
Increase in net contract liabilities	6,800,000
Contract asset impairment	0		$ 0
Remaining performance obligations	5,952,881,000
Minimum [Member]
Revenue From Contract With Customers [Line Items]
Change in total estimated cost	1,000,000
United States Electrical Construction And Facilities Services [Member]
Revenue From Contract With Customers [Line Items]
Change in total estimated cost	4,600,000
United States Mechanical Construction And Facilities Services [Member]
Revenue From Contract With Customers [Line Items]
Change in total estimated cost	$ 5,400,000