Stock-Based Benefit Plans (Details 2) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2012 Performance Based Restricted Stock Units [Member]	Jul. 31, 2012 Performance Based Restricted Stock Units [Member]	Dec. 20, 2011 Performance Based Restricted Stock Units [Member]
Performance-Based Restricted Stock Units
Issuance of restricted stock and stock units, shares						366,000
Closing price of the Company's common stock on date of issuance							$ 20.50
Stock based expense recognized	$ 3,367,000	$ 2,430,000	$ 12,227,000	$ 10,147,000	$ 1,011,000	$ 2,931,000
Unamortized value of RSUs					4,572,000	4,572,000
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures						$ 7,503,000