Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2013
Operating Loss Carryforwards [Line Items]
Effective tax rate (ETR)	4.80%	8.30%
Statutory income tax rate	35.00%
Current deferred tax liabilities	$ 4	$ 20
Less valuation allowance	13,400	14,500
Undistributed earnings of its foreign subsidiaries	1,800,000
Research credits	700	100	$ 2,100
Unrecognized tax benefits that would impact ETR	29,400
Interest and penalties	3,700
Unrecognized tax benefits related to tax positions	3,000
Federal [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	10,100
Federal net operating loss carryforwards related to share option exercises	3,200
Alternative minimum tax credits	6,700
Research credits	5,400
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	40,100
California [Member]
Operating Loss Carryforwards [Line Items]
Research credits	$ 1,100
Origio [Member]
Operating Loss Carryforwards [Line Items]
Less valuation allowance		1,000	$ 1,100
Sauflon [Member]
Operating Loss Carryforwards [Line Items]
Less valuation allowance		$ 13,500