Significant Accounting Policies (Narrative) (Details) $ in Thousands	12 Months Ended
	May. 30, 2015 USD ($) customer	May. 31, 2014 USD ($) customer	Jun. 01, 2013 USD ($)
Significant Accounting Policies [Line Items]
Maximum amount of cash insured by the FDIC	$ 250
Checks outstanding in excess of related book cash balances	1,800	$ 1,500
Available-for-sale securities unrealized lossed included in AOCI	372	460
Investment securities available-for-sale, current	249,961	194,738
Investment securities available-for-sale, non-current	1,700	1,500
Trade receivables	99,013	82,978
Allowance for doubtful accounts	$ 513	430
Percentage of bad debts recognized at sixty days past due	100.00%
Threshold period past due for bad debt	60 days
Growing period	154 days
Dividends paid to shareholder of record number of days after quarter	60 days
Dividends paid to shareholder of record number of days after yearend	65 days
Number of days after record dividends payable	15 days
Dividends payable	$ 15,400	10,500
Delivery costs	47,000	43,000	$ 38,100
Advertising expense	$ 9,300	$ 8,500	$ 5,100
Sales Revenue, Net [Member]
Significant Accounting Policies [Line Items]
Number of major customers | customer	2
Accounts Receivable [Member]
Significant Accounting Policies [Line Items]
Number of major customers | customer	2	2
Two Affiliated Customers [Member] | Sales Revenue, Net [Member]
Significant Accounting Policies [Line Items]
Trade receivables concentration percentage	25.70%	28.20%	30.00%
Two Affiliated Customers [Member] | Accounts Receivable [Member]
Significant Accounting Policies [Line Items]
Trade receivables concentration percentage	24.00%	28.00%
Minimum [Member]
Significant Accounting Policies [Line Items]
Flock cost amortization period	1 year
Intangible assets estimated useful life	3 years
Minimum [Member] | Building and Improvements [Member]
Significant Accounting Policies [Line Items]
Property, plant and equipment useful life	15 years
Minimum [Member] | Machinery and Equipment [Member]
Significant Accounting Policies [Line Items]
Property, plant and equipment useful life	3 years
Maximum [Member]
Significant Accounting Policies [Line Items]
Flock cost amortization period	2 years
Intangible assets estimated useful life	25 years
Maximum [Member] | Building and Improvements [Member]
Significant Accounting Policies [Line Items]
Property, plant and equipment useful life	25 years
Maximum [Member] | Machinery and Equipment [Member]
Significant Accounting Policies [Line Items]
Property, plant and equipment useful life	12 years