Condensed Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Statement of Comprehensive Income [Abstract]
Net income including noncontrolling interests	$ 21,474		$ 33,980		$ 52,192		$ 61,788
Other comprehensive income, net of tax:
Foreign currency translation adjustments	102		(54)		28		(42)
Post retirement plans, amortization of actuarial loss included in net income	549	[1]	531	[1]	1,103	[1]	1,047	[1]
Other comprehensive income	651		477		1,131		1,005
Comprehensive income	22,125		34,457		53,323		62,793
Less: Comprehensive income attributable to noncontrolling interests	(460)		(532)		(1,011)		(1,195)
Comprehensive income attributable to EMCOR Group, Inc.	$ 21,665		$ 33,925		$ 52,312		$ 61,598

[1] Net of tax of $0.2 million for each of the three month periods ended June 30, 2013 and 2012, and $0.4 million for each of the six month periods ended June 30, 2013 and 2012.