Note 6 - Components of Net Periodic Benefit Related to Pension and Other Postretirement Benefit Plans - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended	9 Months Ended
	Aug. 27, 2022	Aug. 28, 2021	Aug. 27, 2022	Aug. 27, 2022	Aug. 28, 2021
Settlement charge			$ 3,329
Pension Plan [Member] | UNITED STATES
Service cost	$ 0	$ 0		$ 0	$ 0
Interest cost	2,368	2,325		7,103	6,974
Expected return on assets	(7,117)	(7,781)		(21,353)	(23,342)
Prior service cost (benefit)	(1)	(1)		(2)	(2)
Actuarial loss (gain)	1,013	799		3,040	2,398
Settlement charge	0	0		0	0
Net periodic benefit	(3,737)	(4,658)		(11,212)	(13,972)
Pension Plan [Member] | Foreign Plan [Member]
Service cost	666	824		2,086	2,478
Interest cost	679	743		2,204	2,215
Expected return on assets	(1,525)	(3,120)		(4,916)	(9,301)
Prior service cost (benefit)	15	17		47	51
Actuarial loss (gain)	570	1,020		1,830	3,059
Settlement charge	0	0		3,329	0
Net periodic benefit	405	(516)		4,580	(1,498)
Other Postretirement Benefits Plan [Member]
Service cost	0	5		0	16
Interest cost	184	206		551	616
Expected return on assets	(2,719)	(2,236)		(8,156)	(6,708)
Prior service cost (benefit)	0	0		0	0
Actuarial loss (gain)	(845)	18		(2,535)	55
Settlement charge	0	0		0	0
Net periodic benefit	$ (3,380)	$ (2,007)		$ (10,140)	$ (6,021)