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Leases - Schedule of Changes in Future Minimum Lease Obligations (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Leases [Line Items] |  |  |  |  |  |
Balance, Beginning of Period | $ 12,831 |  | $ 17,770 |  | $ 19,609 |
Charges Incurred | 7,371 | [1] | 7,636 | [1] | 6,527 | [1]
Net Cash Payments | (11,055) | [2] | (11,035) | [2] | (27,952) | [2]
Other |  | [3] | (1,467) | [3] | 538 | [3]
Balance, End of Period | 13,262 |  | 12,831 |  | 17,770 |
Continuing Operations [Member] |  |  |  |  |  |
Leases [Line Items] |  |  |  |  |  |
Charges Incurred | 4,249 | [4] | 1,313 | [4] | 4,364 | [4]
Net Cash Payments | (3,818) |  | (6,544) |  | (6,115) |
Other |  |  | $ 292 | [3],[5] | $ (88) | [3],[5]
[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] | See Note 9 "Leases" of the notes to our consolidated financial statements for the future minimum lease payments under operating leases for discontinued operations as of December 31, 2012.
[3] | Includes existing prepaid rent and deferred rent liability balances for newly vacated spaces that are netted with the losses incurred in the period recorded.
[4] | 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.
[5] | Includes existing prepaid rent and deferred rent liability balances for newly vacated spaces that offset the losses incurred in the period recorded.

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- Details
Name: | ceco_LeasesLineItems
Namespace Prefix: | ceco_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The present value of remaining lease obligations recorded at the time a facility is exited. + References No definition available. + Details
Name: | ceco_RemainingLeaseObligations
Namespace Prefix: | ceco_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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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