Variable Interest Entities (Summary of the Amounts Related to VIE that are Consolidated on the Companys Income Statement) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2020	Jan. 31, 2019
Other income (expense) of consolidated CLO entities:
Gains and other investment income, net	$ 15,563	$ 5,441
Interest and other expense	(17,396)	(8,336)
Consolidated Securitized CLO Entities [Member]
Other income (expense) of consolidated CLO entities:
Gains and other investment income, net	15,563	4,578
Interest and other expense	(17,396)	(8,246)
Net loss attributable to the Company	$ (1,833)	(3,668)
Consolidated Warehouse CLO Entities [Member]
Other income (expense) of consolidated CLO entities:
Net loss attributable to the Company		$ 800