Income Taxes Activities and balances of unrecognized tax benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 731	$ 1,068	$ 1,183
Additions based on tax positions related to the current year	48	125	35
Additions for tax positions of prior years	0	27	0
Reductions based on tax positions related to the current year	0	(39)	(5)
Reductions for tax positions of prior years	(53)	0	(3)
Reductions as result of lapse of applicable statute of limitations	(165)	(450)	(142)
Balance at end of year	561	731	1,068
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	368	480
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	218	163	$ (136)
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	$ 513	$ 730