General (Details Textual) (USD $)	3 Months Ended			9 Months Ended
	Feb. 27, 2014	Nov. 28, 2013	Feb. 28, 2013	Feb. 27, 2014	Feb. 28, 2013	Feb. 27, 2014 Fair Value, Inputs, Level 1 [Member]	May 30, 2013 Fair Value, Inputs, Level 1 [Member]	Feb. 27, 2014 Fair Value, Inputs, Level 2 [Member]	May 30, 2013 Fair Value, Inputs, Level 2 [Member]
Depreciation	$ 8,160,000		$ 8,439,000	$ 24,699,000	$ 25,231,000
Percentage Of Cash Dividends				110.00%
Available-for-sale Securities, Fair Value Disclosure						70,000	71,000
Interest Rate Fair Value Hedge Asset at Fair Value								90,000	30,000
Impairment of Long-Lived Assets Held-for-use		$ 417,000	$ 618,000