Income Taxes (Details 4) - USD ($) $ in Thousands	12 Months Ended
Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Tax Benefits potential Interest and Penalties
Tax Benefits potential Interest and Penalties	$ 1,513	$ 3,426	$ 4,454
Tax Benefit Amount Accrued for potential Interest and Penalties
Tax Benefit Amount Accrued for potential Interest and Penalties	$ 5,179	$ 9,282

Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration