Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Thousands |
Oct. 31, 2016 |
Oct. 31, 2015 |
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
$ 589,773
|
$ 507,020
|
| Bank loan investments |
0
|
304,250
|
| Senior and subordinated note obligations |
0
|
397,039
|
| Available-for-sale Securities [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
13,312
|
25,720
|
| Investments in non-consolidated CLO entities [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
3,837
|
4,363
|
| Equity Method Investments [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
139,929
|
144,137
|
| Cost Method Investments [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
19,154
|
2,151
|
| Level 1 [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Cash equivalents |
21,875
|
14,599
|
| Total financial assets |
145,174
|
130,500
|
| Level 1 [Member] | Trading Account Assets [Member] | Equity Securities [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
93,491
|
71,535
|
| Level 1 [Member] | Trading Account Assets [Member] | Debt Securities [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
18,757
|
20,822
|
| Level 1 [Member] | Available-for-sale Securities [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
11,051
|
23,544
|
| Level 2 [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Cash equivalents |
35,913
|
39,447
|
| Derivative instruments |
2,072
|
298
|
| Total financial assets |
341,659
|
584,566
|
| Level 2 [Member] | Financial Liabilities [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Derivative instruments |
815
|
5,423
|
| Securities sold, not yet purchased |
|
3,034
|
| Total financial liabilities |
815
|
405,496
|
| Level 2 [Member] | Financial Liabilities [Member] | Liabilities Of Consolidated Collateralized Loan Obligation Entity [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Senior and subordinated note obligations |
|
397,039
|
| Level 2 [Member] | Assets Of Consolidated Collateralized Loan Obligation Entity [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Bank loan investments |
|
304,250
|
| Level 2 [Member] | Trading Account Assets [Member] | Equity Securities [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
42,540
|
44,760
|
| Level 2 [Member] | Trading Account Assets [Member] | Debt Securities [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
172,931
|
116,137
|
| Level 2 [Member] | Trading Account Assets [Member] | Short Term Debt Securities[Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
85,822
|
77,395
|
| Level 2 [Member] | Available-for-sale Securities [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
2,261
|
2,176
|
| Level 2 [Member] | Cost Method Investments [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
120
|
103
|
| Other Assets Not Held At Fair Value Investments [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Total financial assets |
162,800
|
150,548
|
| Other Assets Not Held At Fair Value Investments [Member] | Investments in non-consolidated CLO entities [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
3,837
|
4,363
|
| Other Assets Not Held At Fair Value Investments [Member] | Equity Method Investments [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
139,929
|
144,137
|
| Other Assets Not Held At Fair Value Investments [Member] | Cost Method Investments [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
19,034
|
2,048
|
| Total Fair Value [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Cash equivalents |
57,788
|
54,046
|
| Derivative instruments |
2,072
|
298
|
| Total financial assets |
649,633
|
865,614
|
| Total Fair Value [Member] | Financial Liabilities [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Derivative instruments |
815
|
5,423
|
| Securities sold, not yet purchased |
|
3,034
|
| Total financial liabilities |
815
|
405,496
|
| Total Fair Value [Member] | Financial Liabilities [Member] | Liabilities Of Consolidated Collateralized Loan Obligation Entity [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Senior and subordinated note obligations |
|
397,039
|
| Total Fair Value [Member] | Assets Of Consolidated Collateralized Loan Obligation Entity [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Bank loan investments |
|
304,250
|
| Total Fair Value [Member] | Trading Account Assets [Member] | Equity Securities [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
136,031
|
116,295
|
| Total Fair Value [Member] | Trading Account Assets [Member] | Debt Securities [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
191,688
|
136,959
|
| Total Fair Value [Member] | Trading Account Assets [Member] | Short Term Debt Securities[Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
85,822
|
77,395
|
| Total Fair Value [Member] | Available-for-sale Securities [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
13,312
|
25,720
|
| Total Fair Value [Member] | Investments in non-consolidated CLO entities [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
3,837
|
4,363
|
| Total Fair Value [Member] | Equity Method Investments [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
139,929
|
144,137
|
| Total Fair Value [Member] | Cost Method Investments [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
$ 19,154
|
$ 2,151
|