Credit Facilities And Long-Term Debt (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	May 28, 2016	May 30, 2015	May 31, 2014
Debt Instrument [Line Items]
Interest costs incurred	$ 1,100	$ 2,300	$ 3,200
Interest costs capitalized	$ 1,100	$ 1,200	$ 603
Loan Agreements [Member]
Debt Instrument [Line Items]
Covenant description	Unless otherwise approved by our lenders, we are required by provisions of our loan agreements to (1) maintain minimum levels of working capital (ratio of not less than 1.25 to 1) and net worth (minimum of $90.0 million tangible net worth, plus 45% of cumulative net income); (2) limit dividends paid in any given quarter to not exceed an amount equal to one third of the previous quarter's consolidated net income (allowed if no events of default), (3) maintain minimum total funded debt to total capitalization (debt to total tangible capitalization not to exceed 55%); and (4) maintain various current and cash-flow coverage ratios (1.25 to 1), among other restrictions.
Restrictive covenants, minimum working capital ratio	1.25
Restrictive covenants, cumulative net income percentage	45.00%
Restrictive covenants, minimum tangible net worth	$ 90,000
Restrictive covenants, maximum dividends as a percentage of prior year net income	33.33%
Restrictive covenants, funded debt to total	55.00%
Restrictive covenants, minimum current ratio	1.25
Covenant compliance	At May 28, 2016, we were in compliance with the financial covenant requirements of all loan agreements.
Debt Agreements [Member]
Debt Instrument [Line Items]
Covenant description	Under certain of the loan agreements, the lenders have the option to require the prepayment of any outstanding borrowings in the event we undergo a change in control, as defined in the applicable loan agreement. Our debt agreements require Fred R. Adams, Jr., the Company's Founder and Chairman Emeritus, or his family, to maintain ownership of Company shares representing not less than 50% of the outstanding voting power of the Company.
Covenant compliance	We are in compliance with those covenants at May 28, 2016.
Restrictive covenants, minimum voting ownership percentage	50.00%