Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis Transfer Narrative (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Apr. 30, 2017 |
Apr. 30, 2016 |
Apr. 30, 2017 |
Apr. 30, 2016 |
|
| Fair Value of Assets and Liabilities Measured at Fair Value on a Recurring Basis Details [Abstract] | ||||
| Transfers from Level 1 into Level 2 | $ 48 | $ 129 | $ 457 | $ 118 |
| Transfers from Level 2 into Level 1 | $ 42 | $ 86 | $ 47 | $ 102 |