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Subsequent Event - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended | 0 Months Ended
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Feb. 12, 2015
Schedule of Reverse Stock Split [Line Items] |  |  |  |
Amount paid in consideration for cancellation of employment | $ 9,046 us-gaap_AllocatedShareBasedCompensationExpense | $ 10,248 us-gaap_AllocatedShareBasedCompensationExpense | $ 9,544 us-gaap_AllocatedShareBasedCompensationExpense |
Separation Agreement [Member] | Subsequent Event [Member] |  |  |  |
Schedule of Reverse Stock Split [Line Items] |  |  |  |
Amount paid in consideration for cancellation of employment |  |  |  | $ 2,500 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = ceco_EmployeeSeparationAgreementMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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