Stock-Based Benefit Plans (Details 3) (USD $)	3 Months Ended		9 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2012	Jul. 31, 2011	Oct. 31, 2011
Stock Price-Based RSUs issued
RSU expense recognized	$ 3,367,000	$ 2,430,000	$ 12,227,000	$ 10,147,000
Aggregate outstanding RSUs	506,000		506,000		706,000
Stock Price Based Restricted Stock Units [Member]
Stock Price-Based RSUs issued
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures	118,800
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	3,525,000
RSU expense recognized	679,000	983,000	2,207,000	2,718,000
Unamortized value of RSUs	$ 2,722,000		$ 2,722,000		4,929,000