Earnings Per Share and Stock Repurchase Activity (Calculation of Earnings Per Share) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Nov. 29, 2014	Aug. 30, 2014	May 31, 2014	Mar. 01, 2014	Nov. 30, 2013	Aug. 31, 2013	Jun. 01, 2013	Mar. 02, 2013	Nov. 29, 2014	Nov. 30, 2013	Dec. 01, 2012
Earnings Per Share and Stock Repurchase Activity [Abstract]
Weighted average number of shares outstanding - Basic (in shares)									50,405,549	49,988,577	50,285,480
Dilutive effect of stock-based arrangements (in shares)									465,700	550,370	596,711
Weighted average number of shares outstanding - Diluted (in shares)									50,871,249	50,538,947	50,882,191
Net earnings attributable to CLARCOR Inc.	$ 43,508	$ 41,703	$ 34,552	$ 24,321	$ 32,856	$ 28,707	$ 33,051	$ 23,462	$ 144,084	$ 118,076	$ 122,986
Net earnings per common share attributable to CLARCOR Inc. - Basic (in dollars per share)	$ 0.87	$ 0.83	$ 0.68	$ 0.48	$ 0.65	$ 0.57	$ 0.66	$ 0.47	$ 2.86	$ 2.36	$ 2.45
Net earnings per common share attributable to CLARCOR Inc. - Diluted (in dollars per share)	$ 0.86	$ 0.82	$ 0.68	$ 0.48	$ 0.65	$ 0.57	$ 0.66	$ 0.47	$ 2.83	$ 2.34	$ 2.42