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General (Details Textual) (USD $)
3 Months Ended
Aug. 28, 2014
Aug. 29, 2013
Aug. 28, 2014
Fair Value, Inputs, Level 1 [Member]
May 29, 2014
Fair Value, Inputs, Level 1 [Member]
Aug. 28, 2014
Fair Value, Inputs, Level 2 [Member]
May 29, 2014
Fair Value, Inputs, Level 2 [Member]
General [Line Items]            
Depreciation $ 8,960,000 $ 8,207,000        
Percentage Of Cash Dividends 110.00%          
Available-for-sale Securities, Fair Value Disclosure     70,000 70,000    
Interest Rate Fair Value Hedge Asset at Fair Value         $ 170,000 $ 56,000