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Assets Held for Sale - Summary of Assets and Liabilities of Assets Held for Sale on Balance Sheets (Parenthetical) (Detail) $ in Thousands | Sep. 30, 2015 USD ($)
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Assets Held For Sale [Abstract] |  |
Valuation allowance against LCB assets | $ 43,126 | [1]
[1] | During the third quarter of 2015, the valuation allowance against our LCB assets held for sale was adjusted to $43.1 million to reflect the updated fair value for the LCB asset held for sale

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- Definition Assets held for sale. + References No definition available. + Details
Name: | ceco_AssetsHeldForSaleAbstract
Namespace Prefix: | ceco_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of valuation allowance attributable to disposal group held for sale. + References No definition available. + Details
Name: | ceco_DisposalGroupIncludingDiscontinuedOperationValuationAllowanceAssetsHeldForSale
Namespace Prefix: | ceco_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant