Rialto Segment (Condensed Financial Information By Equity Method Investment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Feb. 28, 2018	Feb. 28, 2017	Nov. 30, 2017
Segment Reporting Information [Line Items]
Equity in earnings (loss) from unconsolidated entities	$ (2,431)	$ 12,335
Rialto
Segment Reporting Information [Line Items]
Cash and cash equivalents	44,270		$ 95,552
Loans receivable	591,157		538,317
Real estate owned	346,320		348,601
Investment securities	1,942,045		1,849,795
Investments in partnerships	416,311		393,874
Other assets	58,014		42,949
Total assets	3,398,117		3,269,088
Accounts payable and other liabilities	42,177		48,374
Notes payable	535,790		576,810
Equity	2,820,150		2,643,904
Total liabilities and equity	3,398,117		3,269,088
Revenues	89,764	57,156
Costs and expenses	22,071	28,001
Other income (expense), net	49,187	327
Net loss of unconsolidated entities	116,880	29,482
Equity in earnings (loss) from unconsolidated entities	9,114	$ 722
Debt issue costs	$ 4,100		$ 3,100