General (Details Textual) - USD ($)	3 Months Ended
	Aug. 27, 2015	Aug. 28, 2014	May. 28, 2015
General [Line Items]
Depreciation	$ 10,328,000	$ 8,960,000
Percentage Of Cash Dividends	110.00%
Fair Value, Inputs, Level 1 [Member]
General [Line Items]
Available-for-sale Securities, Fair Value Disclosure	$ 70,000		$ 70,000
Fair Value, Inputs, Level 2 [Member]
General [Line Items]
Interest Rate Fair Value Hedge Liability at Fair Value	$ 90,000		28,000
Fair Value, Inputs, Level 3 [Member]
General [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value, Beginning Balance			$ 7,737,000