Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Thousands |
Apr. 30, 2017 |
Oct. 31, 2016 |
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Cash equivalents |
$ 306,504
|
$ 57,788
|
| Investments |
750,121
|
589,773
|
| Total financial assets |
1,056,890
|
649,633
|
| Financial Liabilities [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Derivative instruments |
4,961
|
815
|
| Total financial liabilities |
4,961
|
815
|
| Other Financial Assets [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Derivative instruments |
265
|
2,072
|
| Trading Account Assets [Member] | Equity Securities [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
213,600
|
136,031
|
| Trading Account Assets [Member] | Debt Securities [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
299,248
|
191,688
|
| Trading Account Assets [Member] | Short Term Debt Securities[Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
66,591
|
85,822
|
| Available-for-sale Securities [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
10,712
|
13,312
|
| Investments in non-consolidated CLO entities [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
2,928
|
3,837
|
| Equity Method Investments [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
137,911
|
139,929
|
| Cost Method Investments [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
19,131
|
19,154
|
| Portion at Other than Fair Value Measurement [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Total financial assets |
159,824
|
162,800
|
| Portion at Other than Fair Value Measurement [Member] | Investments in non-consolidated CLO entities [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
2,928
|
3,837
|
| Portion at Other than Fair Value Measurement [Member] | Equity Method Investments [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
137,911
|
139,929
|
| Portion at Other than Fair Value Measurement [Member] | Cost Method Investments [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
18,985
|
19,034
|
| Level 1 [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Cash equivalents |
269,016
|
21,875
|
| Total financial assets |
469,963
|
145,174
|
| Level 1 [Member] | Trading Account Assets [Member] | Equity Securities [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
170,012
|
93,491
|
| Level 1 [Member] | Trading Account Assets [Member] | Debt Securities [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
22,754
|
18,757
|
| Level 1 [Member] | Available-for-sale Securities [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
8,181
|
11,051
|
| Level 2 [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Cash equivalents |
37,488
|
35,913
|
| Total financial assets |
427,103
|
341,659
|
| Level 2 [Member] | Financial Liabilities [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Derivative instruments |
4,961
|
815
|
| Total financial liabilities |
4,961
|
815
|
| Level 2 [Member] | Other Financial Assets [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Derivative instruments |
265
|
2,072
|
| Level 2 [Member] | Trading Account Assets [Member] | Equity Securities [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
43,588
|
42,540
|
| Level 2 [Member] | Trading Account Assets [Member] | Debt Securities [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
276,494
|
172,931
|
| 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 |
66,591
|
85,822
|
| Level 2 [Member] | Available-for-sale Securities [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
2,531
|
2,261
|
| Level 2 [Member] | Cost Method Investments [Member] |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Investments |
$ 146
|
$ 120
|