Income Taxes (Details 3) - USD ($) $ in Thousands	12 Months Ended
	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