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Note 4 - Supplemental Financial Statement Information - Statement of Income Information (Details) - USD ($)
$ in Thousands
12 Months Ended
Nov. 28, 2020
Nov. 30, 2019
Dec. 01, 2018
Foreign currency transaction losses, net $ (3,078) $ (1,156) $ (4,450)
(Loss) gain on disposal of assets (86) 24,304 2,177
Net periodic pension benefit 17,902 13,661 16,870
Other, net 660 1,134 3,458
Total other income, net 15,398 37,943 18,055
Selling, General and Administrative Expenses [Member]      
Research and development expenses (included in SG&A expenses) $ 36,969 $ 36,624 $ 35,534