Financial Instruments and Fair Value Disclosures - (Reconciliation Of Beginning And Ending Balance For The Company's Level 3 Recurring Fair Value Measurements) (Details) - Financial Services - USD ($) $ in Thousands	3 Months Ended
	Feb. 29, 2020	Feb. 28, 2019
Mortgage servicing rights
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 24,679	$ 37,206
Purchases/loan originations	746	1,586
Sales/loan originations sold, including those not settled	0	0
Disposals/settlements	(1,289)	(908)
Changes in fair value	(11,560)	(2,436)
Interest and principal paydowns	0	0
Ending balance	12,576	35,448
RMF loans held-for-sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	197,224	61,691
Purchases/loan originations	412,250	270,123
Sales/loan originations sold, including those not settled	(314,439)	(200,588)
Disposals/settlements	0	0
Changes in fair value	5,601	(486)
Interest and principal paydowns	(234)	302
Ending balance	$ 300,402	$ 131,042