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Share-Based Compensation - Schedule of Information with Respect to all Outstanding Restricted Stock (Parenthetical) (Detail) - shares | 3 Months Ended | 12 Months Ended
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Mar. 31, 2016 | Dec. 31, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |  |
Adjustment to restricted stock units |  | 200,000
Vested stock settled in cash | 9,200 |

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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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Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition Share based compensation arrangement by share based payment awards equity instruments vested settled in cash. + 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
Name: | us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration