Investments In Equity Method Investees (Details) - USD ($)
$ in Thousands
12 Months Ended
Oct. 31, 2016
Oct. 31, 2015
Oct. 31, 2014
Equity Method Investees Summarized Financial Information [Abstract]      
Total assets $ 78,214 $ 62,180  
Total liabilities 16,224 11,979  
Total Outside equity interests 54,087 42,670  
Total revenue 50,506 52,899 $ 58,281
Total net income $ 36,575 $ 51,013 $ 67,966
Private Equity Partnership [Member]      
Schedule Of Equity Method Investments [Line Items]      
Equity method investment ownership percentage 7.00% 7.00%  
Equity method investment aggregate cost $ 2,600 $ 2,000  
Hexavest [Member]      
Schedule Of Equity Method Investments [Line Items]      
Equity method investment ownership percentage 49.00% 49.00%  
Equity method investment aggregate cost $ 137,300 $ 142,100  
Equity method investment underlying equity in net assets 5,300 5,500  
Intangible assets net excluding goodwill, equity in investee 24,500 27,000  
Goodwill, equity in investee 114,100 116,900  
Deferred tax liability, equity in investee $ 6,600 $ 7,300  
Additional interest that may be purchased by the Company in future periods 26.00% 26.00%  
Value of the Hexavest exercisable option $ 8,300 $ 8,300