Earnings Per Share and Treasury Stock Transactions (Details 1) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended
Dec. 03, 2011	Aug. 27, 2011	May 28, 2011	Feb. 26, 2011	Nov. 27, 2010	Aug. 28, 2010	May 29, 2010	Feb. 27, 2010	Dec. 03, 2011	Nov. 27, 2010	Nov. 28, 2009
EPS Reconciliation Disclosure Items [Line Items]
Weighted average number of shares outstanding - Basic									50,501,842	50,678,617	50,851,933
Dilutive effect of stock-based arrangements									689,593	477,612	268,353
Weighted average number of shares outstanding - Diluted									51,191,435	51,156,229	51,120,286
Net earnings attributable to CLARCOR Inc.	$ 37,244	$ 32,070	$ 32,808	$ 21,881	$ 29,004	$ 28,326	$ 23,885	$ 14,866	$ 124,003	$ 96,081	$ 71,543
Net earnings per common share attributable to CLARCOR Inc. - Basic	$ 0.74	$ 0.63	$ 0.65	$ 0.43	$ 0.57	$ 0.56	$ 0.47	$ 0.29	$ 2.46	$ 1.90	$ 1.41
Net earnings per common share attributable to CLARCOR Inc. - Diluted	$ 0.73	$ 0.63	$ 0.64	$ 0.43	$ 0.57	$ 0.55	$ 0.47	$ 0.29	$ 2.42	$ 1.88	$ 1.40

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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+ Details

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

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-Glossary Other Comprehensive Income

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-Publisher FASB

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-Glossary Net Income

-URI http://asc.fasb.org/extlink&oid=6518256

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-Number 210

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+ Details

- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References+ Details

- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

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

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+ Details