Income Taxes Activities and balances of unrecognized tax benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 561	$ 731	$ 1,068
Additions based on tax positions related to the current year	88	48	125
Additions for tax positions of prior years	9	0	27
Reductions based on tax positions related to the current year	0	0	(39)
Reductions for tax positions of prior years	0	(53)	0
Reductions as result of lapse of applicable statute of limitations	(118)	(165)	(450)
Balance at end of year	540	561	$ 731
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	355	368
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	102	218
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	$ 411	$ 513