|
Related Party Transactions (Details) (USD $)
|
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
|
Apr. 30, 2013
|
Apr. 30, 2012
|
Apr. 30, 2013
|
Apr. 30, 2012
|
Oct. 31, 2012
|
|
| Sponsored Funds [Abstract] | |||||
| Investment advisory and administrative fees | $ 201,790,000 | $ 188,669,000 | $ 393,982,000 | $ 372,153,000 | |
| Distribution fees | 19,845,000 | 20,298,000 | 39,918,000 | 40,775,000 | |
| Service fees | 31,132,000 | 32,065,000 | 62,262,000 | 64,364,000 | |
| Shareholder services fees | 548,000 | 630,000 | 1,088,000 | 1,227,000 | |
| Other revenue | 268,000 | 403,000 | |||
| Total | 253,583,000 | 241,662,000 | 497,653,000 | 478,519,000 | |
| Investment advisory fees waived by the Company | 1,600,000 | 2,100,000 | 4,400,000 | 4,500,000 | |
| Proceeds from sales | 18,474,000 | 32,804,000 | 39,290,000 | 40,006,000 | |
| Net realized gains | 342,000 | 61,000 | 5,251,000 | 124,000 | |
| Related party expenses | 5,600,000 | 4,300,000 | 10,700,000 | 8,700,000 | |
| Related party accounts receivable | 87,700,000 | 87,700,000 | 84,400,000 | ||
| Employee Loan Program | |||||
| Maximum loan amount available under the plan | $ 10,000,000 | $ 10,000,000 | |||
| Minimum fixed borrowing rate under the plan | 0.90% | ||||
| Maximum fixed borrowing rate under the plan | 5.00% | ||||