Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 30, 2022	Jul. 24, 2021
Activity in accumulated other comprehensive loss
Beginning balance	$ 819,622	$ 782,146
Changes before reclassifications	(1,586)	(221)
Amounts reclassified to net income	107	79
Tax effect	(40)	(160)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(1,519)	(302)
Other comprehensive loss	(2,038)	(732)
Ending balance	844,092	764,449
Components of non-controlling interest
Beginning balance	819,622	782,146
Net income	38,940	25,266
Other comprehensive loss	(2,038)	(732)
Ending balance	844,092	764,449
Accumulated other comprehensive income (loss)
Activity in accumulated other comprehensive loss
Beginning balance	(5,797)	(1,521)
Ending balance	(7,316)	(1,823)
Components of non-controlling interest
Beginning balance	(5,797)	(1,521)
Ending balance	(7,316)	(1,823)
Translation adjustment
Activity in accumulated other comprehensive loss
Beginning balance	(1,961)	3,041
Changes before reclassifications	(1,641)	(812)
Amounts reclassified to net income	0	0
Tax effect	0	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(1,641)	(812)
Ending balance	(3,602)	2,229
Components of non-controlling interest
Beginning balance	(1,961)	3,041
Ending balance	(3,602)	2,229
Unrealized gain (loss) on marketable securities
Activity in accumulated other comprehensive loss
Beginning balance	(298)	370
Changes before reclassifications	55	591
Amounts reclassified to net income	59	4
Tax effect	(28)	(147)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	86	448
Ending balance	(212)	818
Components of non-controlling interest
Beginning balance	(298)	370
Ending balance	(212)	818
Net pension amortization and net actuarial loss
Activity in accumulated other comprehensive loss
Beginning balance	(3,538)	(4,932)
Changes before reclassifications	0	0
Amounts reclassified to net income	48	75
Tax effect	(12)	(13)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	36	62
Ending balance	(3,502)	(4,870)
Components of non-controlling interest
Beginning balance	(3,538)	(4,932)
Ending balance	(3,502)	(4,870)
Non-Controlling Interests
Activity in accumulated other comprehensive loss
Beginning balance	8,897	8,648
Other comprehensive loss	(519)	(430)
Ending balance	8,830	8,918
Components of non-controlling interest
Beginning balance	8,897	8,648
Net income	452	700
Other comprehensive loss	(519)	(430)
Ending balance	$ 8,830	$ 8,918