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v2.4.1.9

Leases - Additional Information (Detail) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Property Subject to or Available for Operating Lease [Line Items] |  |  |
Operating leases expiration date | 2023 |  |
Operating leases obligation | $ 377,170,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDue |  |
Assets Held for Sale [Member] |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |
Operating leases obligation | 98,800,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDue / us-gaap_MajorPropertyClassAxis = us-gaap_AssetsHeldForSaleMember |  |
Discontinued Operations [Member] |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |
Rent expense, exclusive of related taxes | 34,500,000 us-gaap_OperatingLeasesRentExpenseNet / us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis = ceco_DiscontinuedOperationMember | 54,400,000 us-gaap_OperatingLeasesRentExpenseNet / us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis = ceco_DiscontinuedOperationMember | 51,800,000 us-gaap_OperatingLeasesRentExpenseNet / us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis = ceco_DiscontinuedOperationMember
Operating leases obligation | 152,351,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDue / us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis = ceco_DiscontinuedOperationMember |  |
Continuing Operation [Member] |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |
Rent expense, exclusive of related taxes | 48,500,000 us-gaap_OperatingLeasesRentExpenseNet / us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis = ceco_ContinuingOperationMember | 55,000,000 us-gaap_OperatingLeasesRentExpenseNet / us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis = ceco_ContinuingOperationMember | 58,500,000 us-gaap_OperatingLeasesRentExpenseNet / us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis = ceco_ContinuingOperationMember
Operating leases obligation | 224,819,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDue / us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis = ceco_ContinuingOperationMember |  |
Transitional Group [Member] |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |
Operating leases obligation | $ 40,300,000 us-gaap_OperatingLeasesFutureMinimumPaymentsDue / us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis = ceco_TransitionalGroupMember |  |
Minimum [Member] |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |
Lease term range, years | 5 years |  |
Number of renewal options for extended terms | 1 year |  |
Maximum [Member] |  |  |
Property Subject to or Available for Operating Lease [Line Items] |  |  |
Lease term range, years | 10 years |  |
Number of renewal options for extended terms | 2 years |  |

X
- Definition The year at which the latest operating lease expires as of the balance sheet date. + References No definition available. + Details
Name: | ceco_OperatingLeaseExpirationDate
Namespace Prefix: | ceco_
Data Type: | us-types:dateStringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Operating leases general lease term. + References No definition available. + Details
Name: | ceco_OperatingLeasesGeneralLeaseTerm
Namespace Prefix: | ceco_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Operating Leases Number Of Renewal Options For Extended Period + References No definition available. + Details
Name: | ceco_OperatingLeasesNumberOfRenewalOptionsForExtendedPeriod
Namespace Prefix: | ceco_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
Name: | us-gaap_OperatingLeasesFutureMinimumPaymentsDue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717 + Details
Name: | us-gaap_OperatingLeasesRentExpenseNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis=ceco_DiscontinuedOperationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis=ceco_TransitionalGroupMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |