Variable Interest Entities (Summary of Application of the Measurement Alternative Results in the Companys Earnings from Consolidated VIE Subsequent to Initial Consolidation) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2020	Jan. 31, 2019
Economic interests in Consolidated Securitized CLO Entities [Abstract]
Management fees	$ 452,554	$ 406,416
Total economic interest	2,325	1,948
Consolidated Securitized CLO Entities [Member]
Economic interests in Consolidated Securitized CLO Entities [Abstract]
Distribution received and realized and unrealized losses on the senior and subordinated interests held by the company	(3,760)	(4,575)
Management fees	1,927	907
Total economic interest	$ (1,833)	$ (3,668)