Share-Based Compensation (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2012
Share-Based Compensation [Line Items]
Estimated compensation expense	$ 20.4
Estimated compensation expense, recognition period, years	four
Restricted stock units awarded	1,317,000
2008 Incentive Compensation Plan [Member]
Share-Based Compensation [Line Items]
Common stock subject to awards of stock options or stock appreciation rights payable in shares	1.0
Common stock subject to any other form of award	1.67
Common stock available for future share-based awards	6,300,000
Employee Stock Options [Member]
Share-Based Compensation [Line Items]
Employee stock options exercisable in percentage	25.00%
Service period, years	four
Expiration period, years	ten
Restricted Stock Shares [Member]
Share-Based Compensation [Line Items]
Service period, years	four
Restricted stock awards exercisable in percentage	25.00%
Vesting period in years	three
Restricted stock units awarded
Restricted Stock Units [Member]
Share-Based Compensation [Line Items]
Restricted stock units awarded	1,317,000
Non-Employee Directors' Stock Options [Member]
Share-Based Compensation [Line Items]
Expiration period, years	ten

Common stock available for future share-based awards.

No definition available.

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- Definition

Common stock subject to awards of restricted stock, restricted stock units, deferred stock, performance units, annual incentive awards and substitute awards, payable in shares.

+ References

No definition available.

+ Details

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- Definition

Common stock subject to awards of stock options or stock appreciation rights payable in shares.

+ References

No definition available.

+ Details

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- Definition

The yearly percentage that vests for employee stock option grants.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of years over which estimated share-based compensation expense for all unvested share-based awards that have been granted to participants will be recognized.

+ References

No definition available.

+ Details

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- Definition

The future estimated share-based compensation expense to be recognized for all unvested share-based awards that have been granted to participants, including both stock options and shares of restricted stock.

+ References

No definition available.

+ Details

Name:	ceco_EstimatedShareBasedCompensationExpense
Namespace Prefix:	ceco_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The yearly percentage that vests for restricted stock awards.

+ References

No definition available.

+ Details

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Namespace Prefix:	ceco_
Data Type:	num:percentItemType
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Period Type:	duration

- Details

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- Definition

The date when the equity-based award expires as specified in the award agreement, which may be presented in a variety of ways (for example, year, month and year, day, month and year, quarter of a year).

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Description of the estimated period of time over which an employee is required to provide service in exchange for the equity-based payment award, which often is the vesting period. This period may be explicit or implicit based on the terms of the award, and may be presented in a variety of ways (for example, year, month and year, day, month and year, quarter of a year).

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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- Definition

Description of the period of time over which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, which may be expressed in a variety of ways (for example, in years, month and year).

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(2)(c)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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