|
Investments (Details) (USD $)
In Thousands, unless otherwise specified |
Oct. 31, 2012
|
Oct. 31, 2011
|
|---|---|---|
| Schedule Of Investments [Line Items] | ||
| Investments | $ 486,933 | $ 287,735 |
| Total investment securities, trading | 190,253 | 193,209 |
|
Equity Securities [Member]
|
||
| Schedule Of Investments [Line Items] | ||
| Total investment securities, trading | 119,448 | 107,987 |
|
Debt Securities [Member]
|
||
| Schedule Of Investments [Line Items] | ||
| Total investment securities, trading | 70,805 | 85,222 |
|
Categories of Investments, Marketable Securities, Trading Securities [Member]
|
||
| Schedule Of Investments [Line Items] | ||
| Total investment securities, trading | 190,253 | 193,209 |
|
Corporate Debt Securities [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member]
|
||
| Schedule Of Investments [Line Items] | ||
| Investments | 0 | 4,832 |
|
Consolidated Sponsored Funds [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member]
|
||
| Schedule Of Investments [Line Items] | ||
| Investments | 157,405 | 143,517 |
|
Separately Managed Accounts [Member] | Categories of Investments, Marketable Securities, Trading Securities [Member]
|
||
| Schedule Of Investments [Line Items] | ||
| Investments | 32,848 | 44,860 |
|
Available-for-sale Securities [Member]
|
||
| Schedule Of Investments [Line Items] | ||
| Investments | 31,148 | 39,841 |
|
Collateralized Loan Obligations [Member]
|
||
| Schedule Of Investments [Line Items] | ||
| Investments | 350 | 278 |
|
Equity Method Investments [Member]
|
||
| Schedule Of Investments [Line Items] | ||
| Investments | 257,652 | 46,900 |
|
Cost Method Investments [Member]
|
||
| Schedule Of Investments [Line Items] | ||
| Investments | $ 7,530 | $ 7,507 |