Accumulated Other Comprehensive Loss (Amounts Reclassified from Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2020	Nov. 30, 2019	Nov. 30, 2018
Equity [Abstract]
Amortization of net actuarial loss	$ 963	$ 218	$ 336
Amortization of prior service cost	425	1,556	1,556
Settlement loss	0	356	0
Total reclassifications	1,388	2,130	1,892
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year	100
Amortization of prior service cost	$ 425	$ 1,556	$ 1,556