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Income Taxes (Details 3) - USD ($) $ in Thousands | 12 Months Ended
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Oct. 31, 2020 | Oct. 31, 2019 | Oct. 31, 2018
Reconciliation of change in gross unrecognized tax benefits |  |  |
Balance, beginning of year | $ 7,897 | $ 12,222 | $ 16,993
Increase in benefit as a result of tax positions taken in prior years | 512 | 2,148 | 2,140
Increase in benefit as a result of tax positions taken in current year | 306 | 1,126 | 949
Decrease in benefit as a result of settlements |  | (2,670) | (4,707)
Decrease in benefit as a result of lapse of statute of limitations | (2,124) | (4,929) | (3,153)
Balance, end of year | $ 6,591 | $ 7,897 | $ 12,222

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