Comprehensive Income (Details) (USD $)	12 Months Ended
	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2010
AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract
Reclass of (losses) and gains of available-for-sale securities	$ (100,000)	$ 600,000	$ 3,000,000
Unamortized loss on derivative instrument, net of tax	(1,424,000)	(1,714,000)
Net unrealized gains on available-for-sale securities, net of tax	5,461,000	3,386,000
Foreign currency translation adjustments, net of tax	(114,000)	(332,000)
Total accumulated other comprehensive income	$ 3,923,000	$ 1,340,000