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Weighted Average Common Shares - Additional Information (Detail) In Millions, unless otherwise specified | 9 Months Ended
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Sep. 30, 2014 | Sep. 30, 2013
Earnings Per Share [Abstract] |  |
Anti-dilutive awards excluded from computations of diluted earnings per share | 0 | 0

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- Definition Shares that have anti dilutive effect on diluted net income per share. + 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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- Details
Name: | us-gaap_EarningsPerShareAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration