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Business Segment Information - Goodwill (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Goodwill      
Goodwill $ 168,126us-gaap_Goodwill $ 167,547us-gaap_Goodwill $ 134,062us-gaap_Goodwill
Air Pollution Control Segment [Member]      
Goodwill      
Goodwill 55,033us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= cece_AirPollutionControlSegmentMember		 53,538us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= cece_AirPollutionControlSegmentMember		  
Energy Segment [Member]      
Goodwill      
Goodwill 15,862us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= cece_EnergySegmentMember		 16,778us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= cece_EnergySegmentMember		  
Fluid Handling Filtration Segment [Member]      
Goodwill      
Goodwill $ 97,231us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= cece_FluidHandlingFiltrationSegmentMember		 $ 97,231us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= cece_FluidHandlingFiltrationSegmentMember