Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Aug. 30, 2013	May 31, 2013
Statement Of Financial Position [Abstract]
Common stock, par value	$ 0.667	$ 0.667
Common stock, shares authorized	35,000,000	35,000,000
Common stock, shares issued	13,828,793	13,828,793
Treasury stock, shares	2,096,161	2,096,161