EARNINGS PER SHARE AND TREASURY STOCK TRANSACTIONS (Details 1) (USD $) In Thousands, except Share data	3 Months Ended		9 Months Ended
	Aug. 27, 2011	Aug. 28, 2010	Aug. 27, 2011	Aug. 28, 2010
EPS Reconciliation Disclosure Items [Line Items]
Weighted average number of shares outstanding - Basic	50,527,206	50,796,393	50,563,556	50,700,066
Dilutive effect of stock-based arrangements	673,035	452,564	693,065	445,005
Weighted average number of shares outstanding - Diluted	51,200,241	51,248,957	51,256,621	51,145,071
Net earnings attributable to CLARCOR Inc.	$ 32,070	$ 28,326	$ 86,759	$ 67,077
Net earnings per share attributable to CLARCOR Inc. - Basic	$ 0.63	$ 0.56	$ 1.72	$ 1.32
Net earnings per share attributable to CLARCOR Inc. - Diluted	$ 0.63	$ 0.55	$ 1.69	$ 1.31