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Segment Reporting - Summary Financial Information by Reporting Segment (Parenthetical) (Detail) (USD $)
3 Months Ended 12 Months Ended
Sep. 30, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Segment Reporting Information [Line Items]              
Asset impairment charge $ 11,500,000us-gaap_AssetImpairmentCharges $ 7,000,000us-gaap_AssetImpairmentCharges     $ 16,898,000us-gaap_AssetImpairmentCharges $ 8,681,000us-gaap_AssetImpairmentCharges $ 86,606,000us-gaap_AssetImpairmentCharges
Goodwill , trade name and asset impairment charges     11,600,000us-gaap_GoodwillAndIntangibleAssetImpairment 10,000,000us-gaap_GoodwillAndIntangibleAssetImpairment 36,209,000us-gaap_GoodwillAndIntangibleAssetImpairment 22,691,000us-gaap_GoodwillAndIntangibleAssetImpairment 127,007,000us-gaap_GoodwillAndIntangibleAssetImpairment
Income from insurance recovery 8,600,000us-gaap_InsuranceRecoveries            
Settlement of a legal matter   15,500,000ceco_PendingLitigationSettlementAmount          
Career Colleges [Member]              
Segment Reporting Information [Line Items]              
Asset impairment charge         14,500,000us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= ceco_CareerCollegesMember
   
Goodwill , trade name and asset impairment charges         2,200,000us-gaap_GoodwillAndIntangibleAssetImpairment
/ us-gaap_StatementBusinessSegmentsAxis
= ceco_CareerCollegesMember
4,700,000us-gaap_GoodwillAndIntangibleAssetImpairment
/ us-gaap_StatementBusinessSegmentsAxis
= ceco_CareerCollegesMember
53,000,000us-gaap_GoodwillAndIntangibleAssetImpairment
/ us-gaap_StatementBusinessSegmentsAxis
= ceco_CareerCollegesMember
Settlement of a legal matter           8,800,000ceco_PendingLitigationSettlementAmount
/ us-gaap_StatementBusinessSegmentsAxis
= ceco_CareerCollegesMember
 
Corporate and Other [Member]              
Segment Reporting Information [Line Items]              
Income from insurance recovery         8,600,000us-gaap_InsuranceRecoveries
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateAndOtherMember
  19,000,000us-gaap_InsuranceRecoveries
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateAndOtherMember
Transitional Group [Member]              
Segment Reporting Information [Line Items]              
Goodwill , trade name and asset impairment charges           3,100,000us-gaap_GoodwillAndIntangibleAssetImpairment
/ us-gaap_StatementBusinessSegmentsAxis
= ceco_TransitionalGroupMember
32,600,000us-gaap_GoodwillAndIntangibleAssetImpairment
/ us-gaap_StatementBusinessSegmentsAxis
= ceco_TransitionalGroupMember
Settlement of a legal matter           $ 1,700,000ceco_PendingLitigationSettlementAmount
/ us-gaap_StatementBusinessSegmentsAxis
= ceco_TransitionalGroupMember