Condensed Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Statement of Comprehensive Income [Abstract]
Net income including noncontrolling interests	$ 46,777		$ 28,893		$ 129,619		$ 81,085
Other comprehensive income, net of tax:
Foreign currency translation adjustments	(312)		(491)		(246)		(463)
Post retirement plans, amortization of actuarial loss included in net income	449	[1]	611	[1]	1,345	[1]	1,714	[1]
Other comprehensive income	137		120		1,099		1,251
Comprehensive income	46,914		29,013		130,718		82,336
Less: Comprehensive income attributable to noncontrolling interests	(1,753)		(2,203)		(3,421)		(3,214)
Comprehensive income attributable to EMCOR Group, Inc.	$ 45,161		$ 26,810		$ 127,297		$ 79,122

[1] Net of tax of $0.1 million and $0.1 million for the three months ended September 30, 2014 and 2013, respectively, and net of tax of $0.4 million and $0.5 million for the nine months ended September 30, 2014 and 2013, respectively.