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Restructuring Charges Disclosure - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012
Restructuring Cost and Reserve [Line Items] |
Accrued retention bonuses | $ 0.3
Gross remaining lease obligations | 78
Accrual for severance and related charges | 8.0
Long term amount | $ 2.7

X
- Definition Expected Remaining Lease Obligations + References No definition available. + Details
Name: | ceco_ExpectedRemainingLeaseObligations
Namespace Prefix: | ceco_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Retention Bonuses Accrued In Association With Restructuring + References No definition available. + Details
Name: | ceco_RetentionBonusesAccruedInAssociationWithRestructuring
Namespace Prefix: | ceco_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Severance Accrual Long Term Portion + References No definition available. + Details
Name: | ceco_SeveranceAccrualLongTermPortion
Namespace Prefix: | ceco_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of severance related costs expected to be paid in the next fiscal year related to restructuring actions. + References No definition available. + Details
Name: | ceco_SeveranceAccrualShortTermPortionRestructuring
Namespace Prefix: | ceco_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_RestructuringCostAndReserveLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration