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Discontinued Operations - Changes in Future Remaining Lease Obligations Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Discontinued Operations And Disposal Groups [Abstract]
Balance, Beginning of Period	$ 37,660	$ 41,212	$ 42,277	$ 45,961
Charges Incurred	214	2,531	1,060	3,270
Net Cash Payments	(2,945)	(2,511)	(8,357)	(7,999)
Other			(51)
Balance, End of Period	$ 34,929	$ 41,232	$ 34,929	$ 41,232

X

- 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

X

- 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

X

- 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

X

- 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

X

- Details

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