Stock Compensation (Stock Compensation Arrangements) (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2011	Jul. 31, 2010
Stock compensation expense before taxes	$ 13,515	$ 14,514	$ 41,430	$ 45,214
Income tax benefit	(3,671)	(3,327)	(11,252)	(10,363)
Stock compensation expense after taxes	9,844	11,187	30,178	34,851
Cost of License [Member]
Stock compensation expense before taxes	1,375	1,585	4,092	5,116
Cost of Maintenance and Service [Member]
Stock compensation expense before taxes	361	490	993	1,531
Research and Development Expense [Member]
Stock compensation expense before taxes	6,157	6,366	19,868	19,863
Sales and Marketing Expense [Member]
Stock compensation expense before taxes	2,812	3,030	7,987	9,544
General and Administrative Expense [Member]
Stock compensation expense before taxes	$ 2,810	$ 3,043	$ 8,490	$ 9,160