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Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income including noncontrolling interests		$ 55,374	$ 52,610
Other comprehensive income, net of tax:
Foreign currency translation adjustments		495	(114)
Post retirement plans, amortization of actuarial loss included in net income (1)	[1]	385	609
Other comprehensive income		880	495
Comprehensive income		56,254	53,105
Less: Comprehensive loss attributable to noncontrolling interests		0	30
Comprehensive income attributable to EMCOR Group, Inc.		$ 56,254	$ 53,135
[1] Net of tax of $0.4 million and $0.2 million for the three months ended March 31, 2018 and 2017, respectively.

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