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Restructuring Charges - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | Mar. 31, 2013 | Dec. 31, 2012
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Restructuring And Related Activities [Abstract] |  |
Accrual for severance and related charges | $ 4.6 | $ 7.8
Long term amount | 2.0 | 2.7
Accrued retention bonuses | 0.9 |
Gross remaining lease obligations | $ 78.0 |

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- 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: | credit
Period Type: | instant

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- 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

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