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Nature of Business and Summary of Significant Accounting Policies - Consolidated Financial Statements Include Accounts of Subsidiaries (Detail)
Dec. 31, 2014
CECO Group, Inc. [Member]  
Consolidation, Wholly Owned Subsidiary, Parent Ownership Interest [Line Items]  
CECO Group Global Holdings LLC 100.00%cece_ConsolidationWhollyOwnedSubsidiariesOwnershipPecentageByParent
/ dei_LegalEntityAxis
= cece_CecoGroupIncMember
Ceco Group Global Holdings LLC [Member]  
Consolidation, Wholly Owned Subsidiary, Parent Ownership Interest [Line Items]  
CECO Group Global Holdings LLC 100.00%cece_ConsolidationWhollyOwnedSubsidiariesOwnershipPecentageByParent
/ dei_LegalEntityAxis
= cece_CecoGroupGlobalHoldingsLLCMember
CECO Filters, Inc. and Subsidiaries ("CFI") [Member]  
Consolidation, Wholly Owned Subsidiary, Parent Ownership Interest [Line Items]  
CECO Group Global Holdings LLC 99.00%cece_ConsolidationWhollyOwnedSubsidiariesOwnershipPecentageByParent
/ dei_LegalEntityAxis
= cece_CecoFiltersIncAndSubsidiariesMember
The Kirk And Blum Manufacturing Company [Member]  
Consolidation, Wholly Owned Subsidiary, Parent Ownership Interest [Line Items]  
CECO Group Global Holdings LLC 100.00%cece_ConsolidationWhollyOwnedSubsidiariesOwnershipPecentageByParent
/ dei_LegalEntityAxis
= cece_KirkAndBlumManufacturingCompanyMember
Ceco Abatement Systems, Inc. [Member]  
Consolidation, Wholly Owned Subsidiary, Parent Ownership Interest [Line Items]  
CECO Group Global Holdings LLC 100.00%cece_ConsolidationWhollyOwnedSubsidiariesOwnershipPecentageByParent
/ dei_LegalEntityAxis
= cece_CecoAbatementSystemsIncMember
EFFOX, Inc. ( "Effox") [Member]  
Consolidation, Wholly Owned Subsidiary, Parent Ownership Interest [Line Items]  
CECO Group Global Holdings LLC 100.00%cece_ConsolidationWhollyOwnedSubsidiariesOwnershipPecentageByParent
/ dei_LegalEntityAxis
= cece_EffoxIncMember
Fisher-Klosterman, Inc. ("FKI") [Member]  
Consolidation, Wholly Owned Subsidiary, Parent Ownership Interest [Line Items]  
CECO Group Global Holdings LLC 100.00%cece_ConsolidationWhollyOwnedSubsidiariesOwnershipPecentageByParent
/ dei_LegalEntityAxis
= cece_FisherKlostermanIncMember
Flextor, Inc. ("Flextor") [Member]  
Consolidation, Wholly Owned Subsidiary, Parent Ownership Interest [Line Items]  
CECO Group Global Holdings LLC 100.00%cece_ConsolidationWhollyOwnedSubsidiariesOwnershipPecentageByParent
/ dei_LegalEntityAxis
= cece_FlextorIncMember
Adwest Technologies, Inc. ('Adwest') [Member]  
Consolidation, Wholly Owned Subsidiary, Parent Ownership Interest [Line Items]  
CECO Group Global Holdings LLC 100.00%cece_ConsolidationWhollyOwnedSubsidiariesOwnershipPecentageByParent
/ dei_LegalEntityAxis
= cece_AdwestTechnologiesIncMember
Aarding Thermal Acoustics B.V. ("Aarding") [Member]  
Consolidation, Wholly Owned Subsidiary, Parent Ownership Interest [Line Items]  
CECO Group Global Holdings LLC 100.00%cece_ConsolidationWhollyOwnedSubsidiariesOwnershipPecentageByParent
/ dei_LegalEntityAxis
= cece_AardingThermalAcousticsBvMember
Met-Pro Technologies LLC ("Met-Pro") [Member]  
Consolidation, Wholly Owned Subsidiary, Parent Ownership Interest [Line Items]  
CECO Group Global Holdings LLC 100.00%cece_ConsolidationWhollyOwnedSubsidiariesOwnershipPecentageByParent
/ dei_LegalEntityAxis
= cece_MetProTechnologiesLlcMember