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Discontinued Operations (Changes In Future Remaining Lease Obligations Discontinued Operations) (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Lease expiration year |  |  |  |  | 2019 |  |  |
Balance, Beginning of Period | $ 43,598 |  | $ 46,682 |  | $ 45,837 |  | $ 50,378 |
Charges Incurred | 416 | [1] | 1,992 | [1] | 713 | [1] | 819 | [1]
Net Cash Payments | (2,799) |  | (3,311) |  | (5,335) |  | (5,834) |
Other |  |  | (1,468) | [2] |  |  | (1,468) | [2]
Balance, End of Period | $ 41,215 |  | $ 43,895 |  | $ 41,215 |  | $ 43,895 |
[1] | Includes charges for newly vacated spaces and subsequent adjustments for accretion, revised estimates, and variances between estimated and actual charges, net of any reversals for terminated lease obligations.
[2] | Includes existing prepaid rent balances for newly vacated spaces that are netted with the losses incurred in the period recorded.

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- Definition For the disposal group, including a component of the entity (discontinued operation), the present value of remaining lease obligations recorded at the time a facility is exited. + References No definition available. + Details
Name: | ceco_DisposalGroupIncludingDiscontinuedOperationRemainingLeaseObligations
Namespace Prefix: | ceco_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Lease obligation expiration year + References No definition available. + Details
Name: | ceco_LeaseExpirationYear
Namespace Prefix: | ceco_
Data Type: | us-types:dateStringItemType
Balance Type: | na
Period Type: | duration

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- Definition The change in the liability during the period for remaining lease obligations related to charges for newly vacated space, subsequent adjustments for accretion, revised estimates and variances between estimated and actual charges. + References No definition available. + Details
Name: | ceco_RemainingLeaseObligationsIncurred
Namespace Prefix: | ceco_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The decrease during the period for remaining lease obligations related to cash payments for vacated facilities. + References No definition available. + Details
Name: | ceco_RemainingLeaseObligationsNetCashPayments
Namespace Prefix: | ceco_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The net change during the period for remaining lease obligations related to transfer of existing deferred rent liability balances for newly vacated spaces that offset the losses incurred in the period recorded. + References No definition available. + Details
Name: | ceco_RemainingLeaseObligationsOther
Namespace Prefix: | ceco_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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