Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Operating Loss Carryforwards [Line Items]
Effective tax rate (ETR)	7.00%	4.80%	(8.30%)
Statutory income tax rate	35.00%
Current deferred tax liabilities	$ 4	$ 4
Less valuation allowance	13,300	13,400
Undistributed earnings of its foreign subsidiaries	2,100,000
Research credit	1,200	$ 700	$ 100
Unrecognized tax benefits that would impact ETR	29,700
Interest and penalties	3,700
Unrecognized tax benefits related to tax positions	1,600
Federal [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	300
Federal net operating loss carryforwards related to share option exercises	8,000
Alternative minimum tax credits	7,000
Research credit	6,600
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	38,900
California [Member]
Operating Loss Carryforwards [Line Items]
Research credit	$ 1,300
Sauflon [Member]
Operating Loss Carryforwards [Line Items]
Less valuation allowance			$ 13,500