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Discontinued Operations - Changes in Future Remaining Lease Obligations Discontinued Operations (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Discontinued Operations And Disposal Groups [Abstract]
Balance, Beginning of Period		$ 17,669	$ 31,605	$ 21,751	$ 37,616
Charges Incurred	[1]	743	157	401	(413)
Net Cash Payments		(2,263)	(3,769)	(6,003)	(9,210)
Other		0	0	0	0
Balance, End of Period		$ 16,149	$ 27,993	$ 16,149	$ 27,993
[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.

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

Disposal group including discontinued operation remaining lease obligations incurred and reversal.

+ References

No definition available.

+ Details

Name:	ceco_DisposalGroupIncludingDiscontinuedOperationRemainingLeaseObligationsIncurredAndReversal
Namespace Prefix:	ceco_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

For the disposal group, including a component of the entity (discontinued operation), the decrease during the period for remaining lease obligations related to cash payments for vacated facilities.

+ References

No definition available.

+ Details

Name:	ceco_DisposalGroupIncludingDiscontinuedOperationRemainingLeaseObligationsNetCashPayments
Namespace Prefix:	ceco_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

For the disposal group, including a component of the entity (discontinued operation), 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_DisposalGroupIncludingDiscontinuedOperationRemainingLeaseObligationsOther
Namespace Prefix:	ceco_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

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