Share-Based Compensation - Schedule of Restricted Stock Units to be Settled in Cash (Parenthetical) (Detail) shares in Millions	12 Months Ended
Dec. 31, 2015 shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Adjustment to restricted stock units	0.2

Adjustments to share based compensation restricted stock units number of shares.

No definition available.

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