Related Party Transactions (Details) - USD ($)	3 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Oct. 31, 2017
Sponsored Funds
Management fees	$ 255,714,000	$ 214,749,000
Distribution fees	19,787,000	18,281,000
Service fees	30,844,000	28,911,000
Shareholder services fees	1,391,000	702,000
Other revenue	144,000	514,000
Total	307,880,000	263,157,000
Investment advisory fees waived by the Company	4,400,000	3,700,000
Proceeds from sales	0	3,733,000
Net realized gains	5,000	203,000
Related party expenses	11,000,000	7,600,000
Accounts Receivable, Related Parties, Sponsored Funds	105,200,000		$ 100,000,000
Accounts Payable, Related Parties, Sponsored Funds	2,000,000		1,700,000
Loan to Affiliate
Loan to affiliate	5,000,000		5,000,000
Interest income earned on loan to affiliate	45,000	40,000
Interest receivable on the loan to affiliate	$ 17,000		13,000
Description of the variable interest rate on the loan to affiliate	The loan earns interest equal to the one-year Canadian Dollar Offered Rate plus 200 basis points, which is payable quarterly in arrears.
Hexavest Related Parties Agreements
Sub-advisory fees paid to Hexavest	$ 100,000	100,000
Reimbursement of fund subsidies to the Company from Hexavest	8,000	100,000
Fees earned from Hexavest for the sale of institutional separately managed accounts	700,000	$ 500,000
Accounts Receivable, Related Parties, Hexavest Cost Reimbursement Agreement	300,000		$ 300,000
Employee Loan Program
Maximum loan amount available under the plan	$ 20,000,000