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Revenue Recognition - Additional Information (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($) Portfolio	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)
Revenue Recognition [Line Items]
Length of academic year	210 days
Revenue recognized estimated reserve based on historical evidence	$ 1.1		$ 0.9
ASC Topic 606 [Member]
Revenue Recognition [Line Items]
Revenue recognized for payments received from withdrawn students	$ 0.2	$ 0.4
Number of portfolio for revenue recognition | Portfolio	1
Minimum [Member]
Revenue Recognition [Line Items]
Length of academic terms	70 days
Minimum [Member] | ASC Topic 606 [Member]
Revenue Recognition [Line Items]
Days required for documentation to be eligible and approved for funding	90 days
Maximum [Member]
Revenue Recognition [Line Items]
Length of academic terms	77 days
Maximum [Member] | ASC Topic 606 [Member]
Revenue Recognition [Line Items]
Days required for documentation to be eligible and approved for funding	120 days

X

- Definition

The average number of days to package certain students that require extensive documentation. Packaging students includes obtaining various types of funding to make payments on the tuition and fees billed for a students certificate or degree program.

+ References

No definition available.

+ Details

Name:	ceco_AverageDaysToPackageCertainStudents
Namespace Prefix:	ceco_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The average length of an academic terms for our institutions.

+ References

No definition available.

+ Details

Name:	ceco_AverageLengthOfAcademicTerms
Namespace Prefix:	ceco_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The average length of an academic year which is based on the type of institution and program of study.

+ References

No definition available.

+ Details

Name:	ceco_LengthOfAcademicYear
Namespace Prefix:	ceco_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The number of portfolios determined for revenue recognition under ASC Topic 606.

+ References

No definition available.

+ Details

Name:	ceco_NumberOfPortfoliosForRevenueRecognition
Namespace Prefix:	ceco_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

A liability established for situations in which a student withdraws from an institutions and revenue needs to be reversed, based on historical evidence for similar situations.

+ References

No definition available.

+ Details

Name:	ceco_RefundLiabilityReserve
Namespace Prefix:	ceco_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Revenue Recognition Line Items

+ References

No definition available.

+ Details

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Namespace Prefix:	ceco_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of revenue recognized for terminated contracts with students who have withdrawn. Upon withdrawal, collectability is not reasonably assured therefore, revenue is only recognized upon cash collection for these terminated contracts.

+ References

No definition available.

+ Details

Name:	ceco_RevenueRecognizedForWithdrawnStudents
Namespace Prefix:	ceco_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: