Investments (Summary of Equity Method Investees) (Details) - USD ($) $ in Thousands	Jan. 31, 2020	Oct. 31, 2019
Schedule Of Equity Method Investments [Line Items]
Total carrying value	$ 138,454	$ 139,510
Hexavest [Member]
Schedule Of Equity Method Investments [Line Items]
Equity in net assets of Hexavest	5,536	5,466
Definite-lived intangible assets	18,905	19,486
Goodwill	115,598	116,319
Deferred tax liability	(5,086)	(5,243)
Total carrying value	$ 134,953	$ 136,028