Equity (Schedule of Statement of Stockholders' Equity Activities, Including Noncontrolling Interest) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Nov. 27, 2021	Nov. 28, 2020	Nov. 27, 2021	Nov. 28, 2020
Schedule of Stockholders Equity [Line Items]
Beginning balance	$ 995,567,000	$ 991,945,000	$ 1,012,781,000	$ 1,009,675,000
Other comprehensive income (loss), net of tax	(268,000)	(282,000)	(438,000)	72,000
Stock compensation plan transactions	976,000	887,000	1,958,000	1,780,000
Contributions	3,000	5,000	3,000	5,000
Net income (loss)	1,145,000	12,155,000	(16,881,000)	(7,244,000)
Ending balance	997,423,000	1,004,710,000	997,423,000	1,004,710,000
Adjustment [Member]
Schedule of Stockholders Equity [Line Items]
Beginning balance				422,000
Cumulative Effect Period Of Adoption Adjusted Balance [Member]
Schedule of Stockholders Equity [Line Items]
Beginning balance				1,010,097,000
Treasury Stock [Member]
Schedule of Stockholders Equity [Line Items]
Beginning balance	(27,451,000)	(26,676,000)	(27,433,000)	(26,674,000)
Stock compensation plan transactions	1,000	(47,000)	(17,000)	(49,000)
Ending balance	(27,450,000)	(26,723,000)	(27,450,000)	(26,723,000)
Treasury Stock [Member] | Cumulative Effect Period Of Adoption Adjusted Balance [Member]
Schedule of Stockholders Equity [Line Items]
Beginning balance				(26,674,000)
Additional Paid-in Capital [Member]
Schedule of Stockholders Equity [Line Items]
Beginning balance	65,044,000	61,267,000	64,044,000	60,372,000
Stock compensation plan transactions	975,000	934,000	1,975,000	1,829,000
Contributions		5,000		5,000
Ending balance	66,019,000	62,206,000	66,019,000	62,206,000
Additional Paid-in Capital [Member] | Cumulative Effect Period Of Adoption Adjusted Balance [Member]
Schedule of Stockholders Equity [Line Items]
Beginning balance				60,372,000
AOCI Attributable to Parent [Member]
Schedule of Stockholders Equity [Line Items]
Beginning balance	(728,000)	433,000	(558,000)	79,000
Other comprehensive income (loss), net of tax	(268,000)	(282,000)	(438,000)	72,000
Ending balance	(996,000)	151,000	(996,000)	151,000
AOCI Attributable to Parent [Member] | Cumulative Effect Period Of Adoption Adjusted Balance [Member]
Schedule of Stockholders Equity [Line Items]
Beginning balance				79,000
Retained Earnings [Member]
Schedule of Stockholders Equity [Line Items]
Beginning balance	957,951,000	956,170,000	975,977,000	975,147,000
Net income (loss)	1,173,000	12,155,000	(16,853,000)	(7,244,000)
Ending balance	959,124,000	968,325,000	959,124,000	968,325,000
Retained Earnings [Member] | Adjustment [Member]
Schedule of Stockholders Equity [Line Items]
Beginning balance				422,000
Retained Earnings [Member] | Cumulative Effect Period Of Adoption Adjusted Balance [Member]
Schedule of Stockholders Equity [Line Items]
Beginning balance				975,569,000
Noncontrolling Interest [Member]
Schedule of Stockholders Equity [Line Items]
Beginning balance	0		0
Contributions	3,000		3,000
Net income (loss)	(28,000)		(28,000)
Ending balance	(25,000)		(25,000)
Common Stock [Member] | Common Stock [Member]
Schedule of Stockholders Equity [Line Items]
Beginning balance	703,000	703,000	703,000	703,000
Ending balance	703,000	703,000	703,000	703,000
Common Stock [Member] | Common Stock [Member] | Cumulative Effect Period Of Adoption Adjusted Balance [Member]
Schedule of Stockholders Equity [Line Items]
Beginning balance				703,000
Class A Common Stock [Member] | Common Stock [Member]
Schedule of Stockholders Equity [Line Items]
Beginning balance	48,000	48,000	48,000	48,000
Ending balance	$ 48,000	$ 48,000	$ 48,000	48,000
Class A Common Stock [Member] | Common Stock [Member] | Cumulative Effect Period Of Adoption Adjusted Balance [Member]
Schedule of Stockholders Equity [Line Items]
Beginning balance				$ 48,000