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Share-Based Compensation - Schedule of Deferred Stock Units to be Settled in Shares (Parenthetical) (Detail)	9 Months Ended
	Sep. 30, 2015 shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Vested but unreleased awards	300

X

- Definition

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

+ References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

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