Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	May 28, 2016	Nov. 28, 2015
Allowance for doubtful accounts	$ 12,418	$ 11,893
Preferred stock, shares authorized (in shares)	10,045,900	10,045,900
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	160,000,000	160,000,000
Common stock, shares outstanding (in shares)	50,325,411	50,074,310