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Credit Agreement - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012
Line of Credit Facility [Line Items]
Revolving credit facility maturity date	Jan. 31, 2014
Number of days for pre-payment notice	3 days
Number of days for termination notice	5 days
Loans disbursed under Credit Agreement secured by cash, percentage	110.00%
Credit facility borrowings	$ 80,000,000
Credit Agreement [Member]
Line of Credit Facility [Line Items]
Minimum cash under covenant term	$ 75,000,000

X

- Definition

Credit Agreement Minimum Cash Balance Amount

+ References

No definition available.

+ Details

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

X

- Definition

Prepayment Notice Period

+ References

No definition available.

+ Details

Name:	ceco_PrepaymentNoticePeriod
Namespace Prefix:	ceco_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Required Collateral Percent For Borrowings

+ References

No definition available.

+ Details

Name:	ceco_RequiredCollateralPercentForBorrowings
Namespace Prefix:	ceco_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Termination Notice Period

+ References

No definition available.

+ Details

Name:	ceco_TerminationNoticePeriod
Namespace Prefix:	ceco_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Amount borrowed under the credit facility as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityAmountOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration

X

- Details

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