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Leases - Schedule of Changes in Future Minimum Lease Obligations (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Leases [Abstract]
Balance, Beginning of Period	$ 4,588ceco_RemainingLeaseObligations	$ 6,147ceco_RemainingLeaseObligations	$ 4,915ceco_RemainingLeaseObligations
Charges Incurred	4,043ceco_RemainingLeaseObligationsIncurred	1,905ceco_RemainingLeaseObligationsIncurred	2,931ceco_RemainingLeaseObligationsIncurred
Net Cash Payments	(3,783)ceco_RemainingLeaseObligationsNetCashPayments	(6,746)ceco_RemainingLeaseObligationsNetCashPayments	(1,699)ceco_RemainingLeaseObligationsNetCashPayments
Other	(7)ceco_RemainingLeaseObligationsOther	3,282ceco_RemainingLeaseObligationsOther
Balance, End of Period	$ 4,841ceco_RemainingLeaseObligations	$ 4,588ceco_RemainingLeaseObligations	$ 6,147ceco_RemainingLeaseObligations

X

- 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

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