Share-Based Compensation - Schedule of Deferred Stock Units to be Settled in Shares (Parenthetical) (Detail)	12 Months Ended
Dec. 31, 2015 shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Vested but unreleased awards	300

Share based compensation arrangement by share based payment award deferred stock unit vested but unreleased in period.

No definition available.

Name:	ceco_ShareBasedCompensationArrangementByShareBasedPaymentAwardDeferredStockUnitVestedButUnreleasedInPeriod
Namespace Prefix:	ceco_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration