Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 3,055	$ 198
Other comprehensive income (loss), net of tax:
Interest rate swap	(275)
Foreign currency translation	321	(885)
Comprehensive income (loss)	3,101	(687)
Net loss attributable to noncontrolling interest	(45)
Comprehensive income (loss) attributable to CECO Environmental Corp.	$ 3,056	$ (687)