Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Statement [Abstract]
Net sales	$ 112,258	$ 86,961	$ 215,433	$ 167,946
Cost of sales	78,328	60,333	149,917	120,343
Gross profit	33,930	26,628	65,516	47,603
Selling and administrative expenses	20,131	14,443	41,076	28,104
Acquisition and integration expenses	324	962	361	1,293
Amortization and earn-out expenses	4,914	6,735	9,711	10,739
Income from operations	8,561	4,488	14,368	7,467
Other income (expense), net	(399)	562	381	(1,174)
Interest expense	(1,980)	(1,174)	(4,082)	(2,134)
Income before income taxes	6,182	3,876	10,667	4,159
Income tax expense	2,145	1,772	3,575	1,857
Net income	4,037	2,104	7,092	2,302
Less net loss attributable to noncontrolling interest	(13)		(58)
Net income attributable to CECO Environmental Corp.	$ 4,050	$ 2,104	$ 7,150	$ 2,302
Earnings per share:
Basic	$ 0.12	$ 0.08	$ 0.21	$ 0.09
Diluted	$ 0.12	$ 0.08	$ 0.21	$ 0.09
Weighted average number of common shares outstanding:
Basic	33,946,117	26,283,529	33,937,128	26,277,456
Diluted	34,161,543	26,627,051	34,139,087	26,643,857