Income Taxes Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Oct. 31, 2016 |
Oct. 31, 2015 |
Oct. 31, 2014 |
|
| Unrecognized tax benefits | |||
| Beginning Balance | $ 2,100 | $ 1,798 | $ 857 |
| Additions for tax provisions of prior years | 6 | 437 | 1,117 |
| Additions based on tax provisions related to current year | 57 | 62 | 0 |
| Reductions for tax provisions of prior years | 0 | (130) | (176) |
| Lapse of statute of limitations | (304) | (67) | 0 |
| Ending Balance | 1,859 | 2,100 | 1,798 |
| Non-current tax benefits that would change the effective tax rate if recognized | $ 1,900 | $ 2,100 | $ 1,800 |