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
	May 29, 2021	May 30, 2020	May 29, 2021	May 30, 2020
Pension Plan [Member] | UNITED STATES
Service cost	$ 0	$ 0	$ 0	$ 0
Interest cost	2,325	2,935	4,650	5,869
Expected return on assets	(7,781)	(6,439)	(15,561)	(12,879)
Prior service cost (benefit)	(1)	(1)	(2)	(2)
Actuarial loss	799	1,799	1,599	3,598
Net periodic benefit	(4,658)	(1,706)	(9,314)	(3,414)
Pension Plan [Member] | Foreign Plan [Member]
Service cost	821	721	1,654	1,441
Interest cost	739	781	1,472	1,563
Expected return on assets	(3,104)	(2,798)	(6,181)	(5,596)
Prior service cost (benefit)	17	16	34	32
Actuarial loss	1,016	940	2,038	1,880
Net periodic benefit	(511)	(340)	(983)	(680)
Other Postretirement Benefits Plan [Member]
Service cost	5	18	11	37
Interest cost	206	284	411	567
Expected return on assets	(2,236)	(1,994)	(4,472)	(3,988)
Prior service cost (benefit)	0	0	0	0
Actuarial loss	18	16	36	31
Net periodic benefit	$ (2,007)	$ (1,676)	$ (4,014)	$ (3,353)