Other Intangible Assets (Tables)

9 Months Ended

Jul. 31, 2011

Other Intangible Assets [Abstract]

Other intangible assets

	October 31,							July 31,
	2010							2011
	Gross		Accumulated			Net		Gross		Accumulated			Net
	Intangible		Amortization			Intangible		Intangible		Amortization			Intangible
Developed technology	$	417,833	$	(186,129	)	$	231,704	$	417,833	$	(222,327	)	$	195,506
Patents and licenses		45,388		(45,167	)		221		45,388		(45,272	)		116
Customer relationships, covenants not to compete, outstanding purchase orders and contracts		323,573		(129,086	)		194,487		323,573		(169,350	)		154,223
Total other intangible assets	$	786,794	$	(360,382	)	$	426,412	$	786,794	$	(436,949	)	$	349,845

Expected future amortization of finite-lived other intangible assets

Period ended October 31,
2011 (remaining three months)	$	20,102
2012		73,564
2013		71,145
2014		56,987
2015		52,714
Thereafter		75,333
	$	349,845