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Segment Reporting - Additional Information (Detail) | 12 Months Ended
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Dec. 31, 2017 Segment Cmp
Segment Reporting Information [Line Items] |
Number of reporting segments | Segment | 3
CTU [Member] |
Segment Reporting Information [Line Items] |
Students enrolled expressed as percentage of enrollment | 63.00%
CTU [Member] | Fully Online [Member] |
Segment Reporting Information [Line Items] |
Percentage of enrollment | 92.00%
AIU [Member] |
Segment Reporting Information [Line Items] |
Students enrolled expressed as percentage of enrollment | 36.00%
AIU [Member] | Fully Online [Member] |
Segment Reporting Information [Line Items] |
Percentage of enrollment | 94.00%
All Other Campuses [Member] |
Segment Reporting Information [Line Items] |
Number of campuses completed teach out activities | Cmp | 7
All Other Campuses [Member] | Maximum [Member] |
Segment Reporting Information [Line Items] |
Students enrolled expressed as percentage of enrollment | 1.00%

X
- Definition The number of campuses which completed their teach-out activities for the reporting period. + References No definition available. + Details
Name: | ceco_NumberOfCampusesWhichCompletedTeachOut
Namespace Prefix: | ceco_
Data Type: | xbrli:positiveIntegerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of enrollment. + References No definition available. + Details
Name: | ceco_PercentageOfEnrollment
Namespace Prefix: | ceco_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The percentage of student enrollment for a specific group of the total entity. + References No definition available. + Details
Name: | ceco_PercentageOfStudentEnrollment
Namespace Prefix: | ceco_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ceco_CTUMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ProductOrServiceAxis=ceco_FullyOnlineProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ceco_AIUMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ceco_AllOtherCampusesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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