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		6 Months Ended
	May 31, 2020	May 31, 2019	May 31, 2020	May 31, 2019
Mortgage servicing rights
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 12,576	$ 35,448	$ 24,679	$ 37,206
Purchases/loan originations	607	672	1,354	2,259
Sales/loan originations sold, including those not settled	0	0	0	0
Disposals/settlements	(8,908)	(1,378)	(10,197)	(2,287)
Changes in fair value	(3,037)	(5,323)	(14,598)	(7,759)
Interest and principal paydowns	0	0	0	0
Ending balance	1,238	29,419	1,238	29,419
RMF loans held-for-sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	300,402	131,042	197,224	61,691
Purchases/loan originations	5,400	435,189	417,650	705,311
Sales/loan originations sold, including those not settled	(143,285)	(299,962)	(457,724)	(500,549)
Disposals/settlements	0	(9,920)	0	(9,920)
Changes in fair value	(2,334)	3,022	3,267	3,324
Interest and principal paydowns	(298)	228	(532)	(258)
Ending balance	$ 159,885	$ 259,599	159,885	$ 259,599
Servicing Portfolio
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Disposals/settlements			$ 7,500