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Segment Reporting - Additional Information (Detail)	12 Months Ended
	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: