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Restructuring Charges - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012
Restructuring Cost and Reserve [Line Items] |  |
Accrual for severance and related charges | $ 4.0 | $ 7.2
Long term amount | 1.7 | 2.7
Accrued retention bonuses | 2.2 |
Amount recorded ratably over the period retained | 2.3 |
Minimum [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Gross remaining lease obligations | 30.0 |
Maximum [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Gross remaining lease obligations | $ 35.0 |

X
- Definition The present value of the estimated charge related to remaining lease obligations for lease exits offset with an estimated amount for sublease income. + References No definition available. + Details
Name: | ceco_PresentValueOfRemainingLeaseObligation
Namespace Prefix: | ceco_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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: | credit
Period Type: | instant

X
- Definition Retention Bonuses Amount Recorded During Period. + References No definition available. + Details
Name: | ceco_RetentionBonusesAmountRecordedDuringPeriod
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: | credit
Period Type: | instant

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

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