Earnings Per Share (Schedule Of Earnings Per Share) (Details) (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2011	Jul. 31, 2010
Earnings Per Share
Net income	$ 38,137	$ 39,727	$ 118,792	$ 64,605
Basic, weighted average common shares	47,322	45,605	46,606	45,459
Basic earnings per common share	$ 0.81	$ 0.87	$ 2.55	$ 1.42
Effect of dilutive stock options	$ 1,687	$ 797	$ 1,756	$ 773
Diluted weighted average common shares	49,009	46,402	48,362	46,232
Diluted earnings per common share	$ 0.78	$ 0.86	$ 2.46	$ 1.40