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Share-Based Compensation - Schedule of Deferred Stock Units to be Settled in Shares (Detail) | 3 Months Ended
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Mar. 31, 2016 $ / shares shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |  |
Beginning balance of Outstanding Shares | 91,000 | [1]
Granted, Shares | 0 |
Vested, Shares | 0 |
Forfeited, Shares | 0 |
Ending balance of Outstanding Shares | 91,000 | [1]
Beginning balance of Weighted Average Grant-Date Fair Value Per Unit | $ / shares | $ 4.43 | [1]
Ending balance of Weighted Average Grant-Date Fair Value Per Unit | $ / shares | $ 4.43 | [1]
[1] | Includes vested but unreleased awards. These awards are included in total outstanding awards until they are released under the terms of the agreement

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- Definition The number of equity-based deferred stock units that vested during the reporting period. + 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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- Definition The number of equity-based deferred stock units, that were forfeited during the reporting period. + References No definition available. + Details
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Namespace Prefix: | ceco_
Data Type: | xbrli:sharesItemType
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Period Type: | duration

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- Definition The number of grants made during the period for deferred stock units. + 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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- Definition Share based compensation arrangement by share based payment award deferred stock units unreleased number. + References No definition available. + Details
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Namespace Prefix: | ceco_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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- Definition Share based compensation arrangement by share based payment award deferred stock units unreleased weighted average grant date fair value. + References No definition available. + Details
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Namespace Prefix: | ceco_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

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