Supplemental Disclosure Of Cash Flow Information (Schedule Of Additional Information Regarding Cash Flows) (Details) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	May 30, 2020	May 25, 2019	May 26, 2018
Business Acquisition [Line Items]
Income taxes paid	$ 8,258	$ 14,229	$ 10,601
Interest paid	2,191	2,440	1,769
Capitalized leasehold improvements paid directly by landlord	137	2,312	65
Dividends declared, not paid	4,512	4,105	$ 3,791
Veracity [Member]
Business Acquisition [Line Items]
Liability for contingent consideration	7,570
Expertence [Member]
Business Acquisition [Line Items]
Liability for contingent consideration	$ 328
Taskforce [Member]
Business Acquisition [Line Items]
Issuance of common stock			2,602
Liability for contingent consideration		$ 2,195	$ 4,289
Accretive [Member]
Business Acquisition [Line Items]
Issuance of common stock	1,141		11,754