Accumulated Other Comprehensive Loss (Amounts Reclassified from Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands		12 Months Ended
		Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amortization of net actuarial loss		$ 218	$ 336	$ 142
Amortization of prior service cost		1,556	1,556	1,556
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax		356	0	0
Total reclassifications	[1]	2,130	$ 1,892	$ 1,698
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year		$ 400

[1] The accumulated other comprehensive loss components are included in the computation of net periodic benefit costs as further discussed in Note 21 – Postretirement Benefits.