Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jan. 31, 2012	Jan. 31, 2011
Comprehensive Income [Abstract]
Net income	$ 56,694	$ 48,226
Change in unrealized (loss) gain on investments, net of tax of $(59) and $168, respectively	90	(153)
Deferred gain (loss) on cash flow hedges, net of tax of $929 and $79, respectively	(4,706)	998
Reclassification adjustment on deferred loss (gain) on cash flow hedges, net of tax of $(988) and $(861), respectively	3,453	3,698
Foreign currency translation adjustment	(2,047)	(1,959)
Total	53,484	50,810
Change in unrealized gains (losses) on investments, tax	(59)	168
Deferred gains (losses) on cash flow hedges, tax	929	79
Reclassification adjustment on deferred (gains) losses on cash flow hedges, tax	$ (988)	$ (861)