Fair Value Measurements (Schedule Of Fair Value And Carrying Value Of Borrowings Under Long-Term Debt) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Feb. 25, 2017	May 28, 2016
Notes payable
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate, minimum	5.40%	5.40%
Interest rate, maximum	6.40%	6.40%
Capital leases payable
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate, minimum	4.90%
Interest rate, maximum	5.97%
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 22,751	$ 25,570
Carrying Value | Notes payable
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	20,980	25,570
Carrying Value | Capital leases payable
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	1,771	0
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	22,617	25,824
Fair Value | Notes payable
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	21,028	25,824
Fair Value | Capital leases payable
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 1,589	$ 0