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Restructuring Charges - Additional Information (Detail) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2017 | Dec. 31, 2016
Restructuring Cost And Reserve [Line Items] |  |
Accrual for severance and related charges | $ 3.0 | $ 7.3
Long term amount | 0.3 | $ 1.4
Accrued retention bonuses | $ 1.4 |
Lease expiration teach out campuses | 2023 |
Charges related to remaining obligations for continuing operations | $ 67.5 |
Minimum [Member] |  |
Restructuring Cost And Reserve [Line Items] |  |
Gross remaining lease obligations | 4.0 |
Maximum [Member] |  |
Restructuring Cost And Reserve [Line Items] |  |
Gross remaining lease obligations | $ 6.0 |

X
- Definition The longest lease term expiration for all campuses that are scheduled to be taught out as of the reporting date. + References No definition available. + Details
Name: | ceco_LeaseExpirationTeachOutCampuses
Namespace Prefix: | ceco_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

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- Definition The present value of the estimated charge related to remaining lease obligations for lease exits offset with an estimated amount for sublease income. + References No definition available. + Details
Name: | ceco_PresentValueOfRemainingLeaseObligation
Namespace Prefix: | ceco_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition For continuing operations and discontinuing operations under restructuring activities, the present value of remaining lease obligations recorded at the time a facility is exited. + References No definition available. + Details
Name: | ceco_RemainingLeaseObligationsRestructuringIncurred
Namespace Prefix: | ceco_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of retention bonus accrued for as of the balance sheet date as part of restructuring actions that is due to paid within one year of the balance sheet date. + References No definition available. + Details
Name: | ceco_RetentionBonusesAccruedInAssociationWithRestructuring
Namespace Prefix: | ceco_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of severance related costs expected to be paid in greater than one year from the reporting date related to restructuring actions. + References No definition available. + Details
Name: | ceco_SeveranceAccrualLongTermPortion
Namespace Prefix: | ceco_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of severance related costs expected to be paid in the next fiscal year related to restructuring actions. + References No definition available. + Details
Name: | ceco_SeveranceAccrualShortTermPortionRestructuring
Namespace Prefix: | ceco_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_RestructuringCostAndReserveLineItems
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
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |