Investment Securities, Trading (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Oct. 31, 2016 |
Oct. 31, 2015 |
Oct. 31, 2014 |
|
| Schedule Of Trading Securities And Other Trading Assets [Line Items] | |||
| Total investment securities, trading | $ 413,541 | $ 330,649 | |
| Trading securities net unrealized loss | 14,700 | $ 6,900 | |
| Trading securities net unrealized gain | 11,300 | ||
| Short Term Debt Securities[Member] | |||
| Schedule Of Trading Securities And Other Trading Assets [Line Items] | |||
| Total investment securities, trading | 85,822 | 77,395 | |
| Debt Securities [Member] | |||
| Schedule Of Trading Securities And Other Trading Assets [Line Items] | |||
| Total investment securities, trading | 191,688 | 136,959 | |
| Equity Securities [Member] | |||
| Schedule Of Trading Securities And Other Trading Assets [Line Items] | |||
| Total investment securities, trading | $ 136,031 | $ 116,295 | |