Accumulated Other Comprehensive Loss (Changes in the Balances of each Component of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands		12 Months Ended
		Nov. 30, 2021	Nov. 30, 2020	Nov. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance		$ (22,276)
Amounts reclassified from accumulated other comprehensive loss	[1]	1,661	$ 1,388	$ 2,130
Income tax benefit related to items of other comprehensive loss		(1,168)	1,897	2,197
Other comprehensive income (loss), net of tax		3,157	(5,127)	(5,941)
Ending balance		(19,119)	(22,276)
Accumulated Define Benefit Plans Adjustment Member
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance		(22,276)	(15,506)
Other comprehensive loss before reclassifications		2,664	(8,412)
Amounts reclassified from accumulated other comprehensive loss		1,661	1,388
Income tax benefit related to items of other comprehensive loss		(1,168)	1,897
Other comprehensive income (loss), net of tax		3,157	(5,127)
Ending balance		$ (19,119)	(22,276)	(15,506)
Accumulated Define Benefit Plans Adjustment Member | Cumulative Effect, Period of Adoption, Adjustment
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance			$ (1,643)
Ending balance				$ (1,643)

[1] The accumulated other comprehensive loss components are included in the computation of net periodic benefit costs as further discussed in Note 22 – Postretirement Benefits.