Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Net sales	$ 544,845	$ 422,627	$ 324,140
Cost of sales	373,829	294,402	223,218
Gross profit	171,016	128,225	100,922
Selling and administrative expenses	122,944	93,473	81,797
Amortization and earnout expenses	8,180	6,809	7,789
Acquisition and integration expenses	2,508	4,546	818
Executive transition expenses	1,465	1,161	29
Restructuring expenses	1,350	75	632
Income from operations	34,569	22,161	9,857
Other income (expense), net	372	6,947	(2,231)
Interest expense	(13,416)	(5,419)	(2,952)
Income before income taxes	21,525	23,689	4,674
Income tax expense	7,024	5,426	2,691
Net income	14,501	18,263	1,983
Noncontrolling interest	(1,590)	(846)	(557)
Net income (loss) attributable to CECO Environmental Corp.	$ 12,911	$ 17,417	$ 1,426
Income per share:
Basic	$ 0.37	$ 0.5	$ 0.04
Diluted	$ 0.37	$ 0.5	$ 0.04
Weighted average number of common shares outstanding:
Basic	34,665,473	34,672,007	35,345,785
Diluted	35,334,090	35,005,159	35,594,779