Note 10 - Pension and Postretirement Benefits - Amounts in Accumulated Other Comprehensive Income That Have Not Been Recognized as Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	Dec. 01, 2018	Dec. 02, 2017
Pension Plan [Member] | UNITED STATES
Unrecognized actuarial loss	$ 130,661	$ 131,643
Unrecognized prior service cost (benefit)	4	32
Ending balance	130,665	131,675
Pension Plan [Member] | Foreign Plan [Member]
Unrecognized actuarial loss	69,762	67,344
Unrecognized prior service cost (benefit)	1,520	(4)
Ending balance	71,282	67,340
Other Postretirement Benefits Plan [Member]
Unrecognized actuarial loss	3,430	5,877
Unrecognized prior service cost (benefit)
Ending balance	$ 3,430	$ 5,877