Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Aug. 30, 2014	May 31, 2014
Allowance for doubtful accounts	$ 496	$ 430
Common stock, shares outstanding	24,191,000
Treasury stock, shares	13,340,000	13,350,000
Common Stock [Member]
Common stock, par value per share	$ 0.01	$ 0.01
Common stock, authorized shares	60,000,000	60,000,000
Common stock, issued	35,130,000	35,130,000
Common stock, shares outstanding	21,791,000	21,781,000
Class A Common Stock [Member]
Common stock, par value per share	$ 0.01	$ 0.01
Common stock, authorized shares	2,400,000	2,400,000
Common stock, issued	2,400,000	2,400,000
Common stock, shares outstanding	2,400,000	2,400,000