|
Investments (Details) (USD $)
In Thousands, unless otherwise specified |
Oct. 31, 2011
|
Oct. 31, 2010
|
|---|---|---|
| Schedule Of Investments [Line Items] | ||
| Investments | $ 287,735 | $ 334,409 |
|
Corporate Debt Securities [Member]
|
||
| Schedule Of Investments [Line Items] | ||
| Investments | 4,832 | 4,732 |
|
Consolidated Funds [Member] | Equity Securities [Member]
|
||
| Schedule Of Investments [Line Items] | ||
| Investments | 74,434 | 88,184 |
|
Consolidated Funds [Member] | Debt Securities [Member]
|
||
| Schedule Of Investments [Line Items] | ||
| Investments | 69,083 | 111,585 |
|
Separately Managed Accounts [Member] | Equity Securities [Member]
|
||
| Schedule Of Investments [Line Items] | ||
| Investments | 33,553 | 28,692 |
|
Separately Managed Accounts [Member] | Debt Securities [Member]
|
||
| Schedule Of Investments [Line Items] | ||
| Investments | 11,307 | 3,666 |
|
Available-for-sale Securities [Member]
|
||
| Schedule Of Investments [Line Items] | ||
| Investments | 39,841 | 37,541 |
|
Collateralized Loan Obligations [Member]
|
||
| Schedule Of Investments [Line Items] | ||
| Investments | 278 | 1,391 |
|
Equity Method Investments [Member]
|
||
| Schedule Of Investments [Line Items] | ||
| Investments | 46,900 | 51,111 |
|
Cost Method Investments [Member]
|
||
| Schedule Of Investments [Line Items] | ||
| Investments | $ 7,507 | $ 7,507 |