Leases - Schedule of Future Minimum Sublease Rental Income under Operating Leases for Continuing and Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Continuing Operations [Member]
Property Subject to or Available for Operating Lease [Line Items]
2013	$ 52
2014
2015
2016
2017
2018 and thereafter
Total	52
Discontinued Operations [Member]
Property Subject to or Available for Operating Lease [Line Items]
2013	2,478
2014	2,509
2015	2,555
2016	2,569
2017	2,590
2018 and thereafter
Total	$ 12,701

Amount of minimum sublease rentals to be received by the seller-lessee for all operating leases.

No definition available.

Name:	ceco_FutureMinimumSubleaseRentalsUnderOperatingLeases
Namespace Prefix:	ceco_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of minimum sublease rentals to be received by the seller-lessee after the fifth fiscal year.

No definition available.

Name:	ceco_FutureMinimumSubleaseRentalsUnderOperatingLeasesThereafter
Namespace Prefix:	ceco_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of minimum sublease rentals to be received by the seller-lessee in the next five fiscal years.

No definition available.

Name:	ceco_FutureMinimumSubleaseRentalsUnderOperatingLeasesWithinFiveYears
Namespace Prefix:	ceco_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of minimum sublease rentals to be received by the seller-lessee in the next four fiscal years.

No definition available.

Name:	ceco_FutureMinimumSubleaseRentalsUnderOperatingLeasesWithinFourYears
Namespace Prefix:	ceco_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of minimum sublease rentals to be received by the seller-lessee in the next fiscal year.

No definition available.

Name:	ceco_FutureMinimumSubleaseRentalsUnderOperatingLeasesWithinOneYear
Namespace Prefix:	ceco_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of minimum sublease rentals to be received by the seller-lessee in the next three fiscal years.

No definition available.

Name:	ceco_FutureMinimumSubleaseRentalsUnderOperatingLeasesWithinThreeYears
Namespace Prefix:	ceco_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of minimum sublease rentals to be received by the seller-lessee in the next two fiscal years.

No definition available.

Name:	ceco_FutureMinimumSubleaseRentalsUnderOperatingLeasesWithinTwoYears
Namespace Prefix:	ceco_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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