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, 2018	Nov. 30, 2017	Nov. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance		$ (16,924)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[1]	1,892	$ 1,698	$ 1,635
Income tax benefit (expense) related to items of other comprehensive income (loss)		(2,749)	578	(841)
Other comprehensive income (loss), net of tax		7,359	(867)	1,262
Ending Balance		(9,565)	(16,924)
Accumulated Define Benefit Plans Adjustment Member
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance		(16,924)	(16,057)
Net actuarial gain (loss) arising during the period		8,216	(3,143)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		1,892	1,698
Income tax benefit (expense) related to items of other comprehensive income (loss)		(2,749)	578
Other comprehensive income (loss), net of tax		7,359	(867)
Ending Balance		$ (9,565)	$ (16,924)	$ (16,057)

[1] The accumulated other comprehensive loss components are included in the computation of net periodic benefit costs as further discussed in Note 20 – Postretirement Benefits.