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
	Feb. 26, 2022	Feb. 27, 2021
Pension Plan [Member] | UNITED STATES
Service cost	$ 0	$ 0
Interest cost	2,368	2,325
Expected return on assets	(7,117)	(7,781)
Prior service cost (benefit)	(1)	(1)
Actuarial loss	1,013	799
Net periodic benefit	(3,737)	(4,658)
Pension Plan [Member] | Foreign Plan [Member]
Service cost	720	833
Interest cost	789	733
Expected return on assets	(1,747)	(3,077)
Prior service cost (benefit)	16	17
Actuarial loss	649	1,022
Net periodic benefit	427	(472)
Other Postretirement Benefits Plan [Member]
Service cost	0	5
Interest cost	184	205
Expected return on assets	(2,719)	(2,235)
Prior service cost (benefit)	0	0
Actuarial loss	(845)	18
Net periodic benefit	$ (3,380)	$ (2,007)