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Document And Entity Information
Mar. 31, 2025
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Mar. 31, 2025
Entity Registrant Name CECO ENVIRONMENTAL CORP
Entity Central Index Key 0000003197
Entity Emerging Growth Company false
Entity File Number 000-7099
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 13-2566064
Entity Address, Address Line One 5080 Spectrum Drive
Entity Address, Address Line Two Suite 800E
Entity Address, City or Town Addison
Entity Address, State or Province TX
Entity Address, Postal Zip Code 75001
City Area Code (214)
Local Phone Number 357-6181
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, par value $0.01 per share
Trading Symbol CECO
Security Exchange Name NASDAQ