Consolidated Statements Of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2012	Jul. 31, 2011
Statement of Other Comprehensive Income [Abstract]
Net income	$ 66,875	$ 44,217	$ 176,419	$ 118,792
Other comprehensive income (loss):
Foreign currency translation adjustment	(17,501)	(5,595)	(20,814)	16,195
Change in value of derivative instruments, net of tax	(53)	(1,065)	231	(3,461)
Additional minimum pension liability, net of tax	7	7	22	22
Unrealized (loss) gain on marketable securities, net of tax	(16)	38	40	38
Other comprehensive (loss) income	(17,563)	(6,615)	(20,521)	12,794
Comprehensive income	$ 49,312	$ 37,602	$ 155,898	$ 131,586