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Supplemental Disclosure Of Cash Flow Information (Schedule Of Additional Information Regarding Cash Flows) (Details) - USD ($) shares in Thousands, $ in Thousands	9 Months Ended
	Feb. 23, 2019	Feb. 24, 2018
Business Acquisition [Line Items]
Income taxes paid	$ 11,640	$ 9,189
Interest paid	1,878	1,202
Capitalized leasehold improvements paid directly by landlord	1,211
Dividends declared, not paid	4,147	$ 3,780
Taskforce [Member]
Business Acquisition [Line Items]
Issuance of common stock		2,602
Liability for contingent consideration	$ 4,202	$ 6,952
Accretive [Member]
Business Acquisition [Line Items]
Issuance of common stock		11,754

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