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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
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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

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- Definition The net gain (loss) resulting from a sale of loans, including adjustments to record loans classified as held-for-sale at the lower-of-cost-or-market and fair value adjustments to loan held for investment purposes. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13(h)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483589/942-220-S99-1 + Details
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