Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2012	Apr. 30, 2011	Apr. 30, 2012	Apr. 30, 2011
Revenue:
Products	$ 384,726	$ 336,026	$ 718,399	$ 688,453
Services	92,891	81,868	175,903	162,749
Total revenue	477,617	417,894	894,302	851,202
Cost of goods sold:
Products	234,372	202,665	432,124	417,066
Services	60,304	49,396	111,481	99,797
Total cost of goods sold	294,676	252,061	543,605	516,863
Gross profit	182,941	165,833	350,697	334,339
Operating expenses:
Research and development	90,399	99,624	180,063	195,414
Selling and marketing	62,517	61,768	126,928	118,860
General and administrative	27,080	32,480	56,480	70,794
Acquisition and integration costs	(410)	10,741	(146)	34,926
Amortization of intangible assets	12,967	13,674	26,438	42,458
Restructuring costs	1,851	3,164	3,573	4,686
Change in fair value of contingent consideration	0	0	0	(3,289)
Total operating expenses	194,404	221,451	393,336	463,849
Loss from operations	(11,463)	(55,618)	(42,639)	(129,510)
Interest and other income (loss), net	(4,387)	4,229	(9,274)	10,494
Interest expense	(9,646)	(9,406)	(19,216)	(18,956)
Loss before income taxes	(25,496)	(60,795)	(71,129)	(137,972)
Provision for income taxes	2,284	1,891	4,304	3,770
Net loss	$ (27,780)	$ (62,686)	$ (75,433)	$ (141,742)
Basic net loss per common share (in dollars per share)	$ (0.28)	$ (0.66)	$ (0.77)	$ (1.49)
Diluted net loss per potential common share (in dollars per share)	$ (0.28)	$ (0.66)	$ (0.77)	$ (1.49)
Weighted average basic common shares outstanding (in shares)	98,981	95,360	98,525	94,928
Weighted average dilutive potential common shares outstanding (in shares)	98,981	95,360	98,525	94,928