Share-Based Compensation - Schedule of Deferred Stock Units to be Settled in Shares (Parenthetical) (Detail)	6 Months Ended
Jun. 30, 2015 shares
Disclosure of Compensation Related Costs, Share-based 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.

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