Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income including noncontrolling interests		$ 169,746	$ 105,772	$ 421,814	$ 279,822
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments		(5,368)	(8,712)	503	(19,257)
Post-retirement plans, amortization of actuarial loss included in net income (1)	[1]	538	404	1,591	1,288
Other comprehensive (loss) income		(4,830)	(8,308)	2,094	(17,969)
Comprehensive income		164,916	97,464	423,908	261,853
Comprehensive income attributable to noncontrolling interests		337	0	337	0
Comprehensive income attributable to EMCOR Group, Inc.		$ 164,579	$ 97,464	$ 423,571	$ 261,853

[1] Net of tax of $0.5 million and $0.1 million for the three months ended September 30, 2023 and 2022, respectively, and net of tax of $0.2 million and $0.4 million for the nine months ended September 30, 2023 and 2022, respectively.