Fair Value Disclosures (Level 4 marketable securities) (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Oct. 31, 2014	Oct. 31, 2013
Fair Value Disclosures (Textual) [Abstract]
Marketable Securities Maturities Term Minimum	1 month
Marketable Securities Maturities Term Maximum	13 months
Summary of amortized cost gross unrealized holding gains and losses
Amortized Cost	$ 12,028	$ 52,502
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	1	71
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	(3)	(65)
Fair value	$ 12,026	$ 52,508