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Leases - Schedule of Future Minimum Sublease Rental Income under Operating Leases for Continuing and Discontinued Operations (Detail) $ in Thousands	Dec. 31, 2017 USD ($)
Property Subject to or Available for Operating Lease [Line Items]
Operating Subleases, 2018	$ 5,928
Operating Subleases, 2019	4,140
Operating Subleases, 2020	2,637
Operating Subleases, 2021	784
Operating Subleases, Total	13,489
Continuing Operation [Member]
Property Subject to or Available for Operating Lease [Line Items]
Operating Subleases, 2018	4,344
Operating Subleases, 2019	3,797
Operating Subleases, 2020	2,637
Operating Subleases, 2021	784
Operating Subleases, Total	11,562
Discontinued Operations [Member]
Property Subject to or Available for Operating Lease [Line Items]
Operating Subleases, 2018	1,584
Operating Subleases, 2019	343
Operating Subleases, Total	$ 1,927

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- Definition

Amount of minimum sublease rentals to be received by the seller-lessee for all operating leases.

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of minimum sublease rentals to be received by the seller-lessee in the next four fiscal years.

+ References

No definition available.

+ Details

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Namespace Prefix:	ceco_
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Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of minimum sublease rentals to be received by the seller-lessee in the next fiscal year.

+ References

No definition available.

+ Details

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Namespace Prefix:	ceco_
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X

- Definition

Amount of minimum sublease rentals to be received by the seller-lessee in the next three fiscal years.

+ References

No definition available.

+ Details

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Namespace Prefix:	ceco_
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X

- Definition

Amount of minimum sublease rentals to be received by the seller-lessee in the next two fiscal years.

+ References

No definition available.

+ Details

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Namespace Prefix:	ceco_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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

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- Details

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X

- Details

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