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

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- Definition Adjustments to share based compensation restricted stock units number of shares. + References No definition available. + Details
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Namespace Prefix: | ceco_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration