Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 4,037	$ 2,104	$ 7,092	$ 2,302
Other comprehensive income (loss), net of tax:
Interest rate swap	(349)		(624)
Foreign currency translation	(1,773)	356	(1,452)	(529)
Comprehensive income	1,915	2,460	5,016	1,773
Net loss attributable to noncontrolling interest	(13)		(58)
Comprehensive income attributable to CECO Environmental Corp.	$ 1,902	$ 2,460	$ 4,958	$ 1,773