Acquisitions, Goodwill and Intangible Assets 3 (Details) - USD ($)
$ in Thousands |
12 Months Ended |
Oct. 31, 2016 |
Oct. 31, 2015 |
| Amortizing intangible assets: |
|
|
| Accumulated amortization |
$ (95,751)
|
$ (87,102)
|
| Intangible assets |
|
|
| Gross intangible assets |
142,560
|
142,535
|
| Accumulated amortization |
(95,751)
|
(87,102)
|
| Intangible assets, net |
46,809
|
55,433
|
| Mutual Fund Management Contract Acquired [Member] |
|
|
| Non-amortizing intangible assets: |
|
|
| Net carrying amount |
6,708
|
6,708
|
| Client Relationships Acquired [Member] |
|
|
| Amortizing intangible assets: |
|
|
| Gross carrying amount |
133,927
|
133,927
|
| Accumulated amortization |
(94,873)
|
(86,419)
|
| Net carrying amount |
$ 39,054
|
$ 47,508
|
| Weighted-average remaining amortization period (in years) |
8 years 6 months
|
8 years 10 months
|
| Intangible assets |
|
|
| Accumulated amortization |
$ (94,873)
|
$ (86,419)
|
| Intellectual Property Acquired [Member] |
|
|
| Amortizing intangible assets: |
|
|
| Gross carrying amount |
1,025
|
1,000
|
| Accumulated amortization |
(385)
|
(319)
|
| Net carrying amount |
$ 640
|
$ 681
|
| Weighted-average remaining amortization period (in years) |
9 years 7 months
|
10 years 7 months
|
| Intangible assets |
|
|
| Accumulated amortization |
$ (385)
|
$ (319)
|
| Trademark Acquired [Member] |
|
|
| Amortizing intangible assets: |
|
|
| Gross carrying amount |
900
|
900
|
| Accumulated amortization |
(493)
|
(364)
|
| Net carrying amount |
$ 407
|
$ 536
|
| Weighted-average remaining amortization period (in years) |
3 years 2 months
|
4 years 2 months
|
| Intangible assets |
|
|
| Accumulated amortization |
$ (493)
|
$ (364)
|