Acquisitions and Joint Ventures - Schedule of Unaudited Pro Forma Financial Information (Details) - General Rubber LLC [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Business Acquisition [Line Items]
Net sales	$ 564,608	$ 478,802
Net income attributable to CECO Environmental Corp	$ 14,562	$ 20,179
Earnings Per Share [Abstract]
Basic	$ 0.42	$ 0.58
Diluted	$ 0.41	$ 0.58