Equity (Schedule of Statement of Stockholders' Equity Activities, Including Noncontrolling Interest) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 27, 2021	Feb. 29, 2020	Feb. 27, 2021	Feb. 29, 2020
Schedule of Stockholders Equity [Line Items]
Beginning balance	$ 1,004,710	$ 934,293	$ 1,009,675	$ 989,806
Other comprehensive income (loss), net of tax	(286)	(29)	(214)	(653)
Purchase of company stock	(826)	(889)	(871)	(910)
Distributions to noncontrolling interest partners				(755)
Restricted stock compensation	964	886	2,789	2,680
Contributions			5
Dividends	(1,661)		(1,661)
Net income (loss)	13,548	13,771	6,304	(42,136)
Ending balance	1,016,449	948,032	1,016,449	948,032
Adjustment [Member]
Schedule of Stockholders Equity [Line Items]
Beginning balance			422
Cumulative Effect Period Of Adoption Adjusted Balance [Member]
Schedule of Stockholders Equity [Line Items]
Beginning balance			1,010,097
Treasury Stock [Member]
Schedule of Stockholders Equity [Line Items]
Beginning balance	(26,723)	(25,888)	(26,674)	(25,866)
Restricted stock forfeitures		103	(4)	102
Purchase of company stock	(826)	(889)	(871)	(910)
Ending balance	(27,549)	(26,674)	(27,549)	(26,674)
Treasury Stock [Member] | Cumulative Effect Period Of Adoption Adjusted Balance [Member]
Schedule of Stockholders Equity [Line Items]
Beginning balance			(26,674)
Paid In Capital [Member]
Schedule of Stockholders Equity [Line Items]
Beginning balance	62,206	58,652	60,372	56,857
Restricted stock forfeitures		(103)	4	(102)
Restricted stock compensation	964	886	2,789	2,680
Contributions			5
Ending balance	63,170	59,435	63,170	59,435
Paid In Capital [Member] | Cumulative Effect Period Of Adoption Adjusted Balance [Member]
Schedule of Stockholders Equity [Line Items]
Beginning balance			60,372
Accumulated Other Comprehensive Loss [Member]
Schedule of Stockholders Equity [Line Items]
Beginning balance	151	(269)	79	355
Other comprehensive income (loss), net of tax	(286)	(29)	(214)	(653)
Ending balance	(135)	(298)	(135)	(298)
Accumulated Other Comprehensive Loss [Member] | Cumulative Effect Period Of Adoption Adjusted Balance [Member]
Schedule of Stockholders Equity [Line Items]
Beginning balance			79
Retained Earnings [Member]
Schedule of Stockholders Equity [Line Items]
Beginning balance	968,325	900,485	975,147	954,527
Reclass of equity portion of Texas Egg Products, LLC in connection with acquisition				1,779
Dividends	(1,661)		(1,661)
Net income (loss)	13,548	13,749	6,304	(42,072)
Ending balance	980,212	914,234	980,212	914,234
Retained Earnings [Member] | Adjustment [Member]
Schedule of Stockholders Equity [Line Items]
Beginning balance			422
Retained Earnings [Member] | Cumulative Effect Period Of Adoption Adjusted Balance [Member]
Schedule of Stockholders Equity [Line Items]
Beginning balance			975,569
Noncontrolling Interests [Member]
Schedule of Stockholders Equity [Line Items]
Beginning balance		562		3,182
Distributions to noncontrolling interest partners				(755)
Reclass of equity portion of Texas Egg Products, LLC in connection with acquisition				(1,779)
Net income (loss)		22		(64)
Ending balance		584		584
Common Stock [Member] | Common Stock [Member]
Schedule of Stockholders Equity [Line Items]
Beginning balance	703	703	703	703
Ending balance	703	703	703	703
Common Stock [Member] | Common Stock [Member] | Cumulative Effect Period Of Adoption Adjusted Balance [Member]
Schedule of Stockholders Equity [Line Items]
Beginning balance			703
Class A Common Stock [Member] | Common Stock [Member]
Schedule of Stockholders Equity [Line Items]
Beginning balance	48	48	48	48
Ending balance	$ 48	$ 48	48	$ 48
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