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Intangible Assets And Goodwill (Summary Of Activity In Goodwill Balance) (Details) - USD ($)
$ in Thousands
9 Months Ended
Feb. 23, 2019
Feb. 24, 2018
Goodwill [Line Items]    
Goodwill, beginning of year $ 191,950 $ 171,088
Impact of foreign currency exchange rate changes (804) 2,195
Goodwill, end of period 191,149 193,581
Taskforce [Member]    
Goodwill [Line Items]    
Acquisitions (see Note 3)   8,762
Accretive [Member]    
Goodwill [Line Items]    
Acquisitions (see Note 3) $ 3 $ 11,536