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Credit Agreement - Schedule of U.S. Credit Agreement (Parenthetical) (Detail) (USD $) | Dec. 31, 2014 | Oct. 31, 2014 | Dec. 31, 2013
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Line of Credit Facility [Line Items] |  |  |
Letter of credit collateralized of restricted cash | $ 11,600,000 ceco_RestrictedCashAndInvestmentsForSecuritizationForLettersOfCredit |  | $ 12,600,000 ceco_RestrictedCashAndInvestmentsForSecuritizationForLettersOfCredit
Letters of credit sub limited | 120,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity | 120,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity |
Letter of credit [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Letters of credit outstanding | 1,300,000 us-gaap_LettersOfCreditOutstandingAmount / us-gaap_ShortTermDebtTypeAxis = us-gaap_LetterOfCreditMember |  |
Letters of credit sub limited | $ 20,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_ShortTermDebtTypeAxis = us-gaap_LetterOfCreditMember |  |

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- Definition Restricted Cash And Investments For Securitization For Letters Of Credit + References No definition available. + Details
Name: | ceco_RestrictedCashAndInvestmentsForSecuritizationForLettersOfCredit
Namespace Prefix: | ceco_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_LineOfCreditFacilityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_ShortTermDebtTypeAxis=us-gaap_LetterOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |