Note 11 - 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	Nov. 30, 2019	Dec. 01, 2018
Pension Plan [Member] | UNITED STATES
Unrecognized actuarial loss	$ 146,149	$ 130,661
Unrecognized prior service (benefit) cost	(9)	4
Ending balance	146,140	130,665
Pension Plan [Member] | Foreign Plan [Member]
Unrecognized actuarial loss	83,457	69,762
Unrecognized prior service (benefit) cost	1,476	1,520
Ending balance	84,933	71,282
Other Postretirement Benefits Plan [Member]
Unrecognized actuarial loss	2,114	3,430
Unrecognized prior service (benefit) cost	0	0
Ending balance	$ 2,114	$ 3,430