Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2012	Jul. 31, 2011
Revenue:
Products	$ 373,418	$ 350,030	$ 1,091,817	$ 1,038,483
Services	100,672	85,283	276,575	248,032
Total revenue	474,090	435,313	1,368,392	1,286,515
Cost of goods sold:
Products	225,238	198,217	657,362	615,283
Services	67,531	52,199	179,012	151,996
Total cost of goods sold	292,769	250,416	836,374	767,279
Gross profit	181,321	184,897	532,018	519,236
Operating expenses:
Research and development	88,315	93,216	268,378	288,630
Selling and marketing	65,397	61,895	192,325	180,755
General and administrative	27,870	28,172	84,350	98,966
Acquisition and integration costs	6	4,822	(140)	39,748
Amortization of intangible assets	12,714	13,673	39,152	56,131
Restructuring costs	2,291	504	5,864	5,190
Change in fair value of contingent consideration	0	0	0	(3,289)
Total operating expenses	196,593	202,282	589,929	666,131
Loss from operations	(15,272)	(17,385)	(57,911)	(146,895)
Interest and other income (loss), net	(2,458)	(3,160)	(11,732)	7,334
Interest expense	(9,597)	(9,470)	(28,813)	(28,426)
Loss before income taxes	(27,327)	(30,015)	(98,456)	(167,987)
Provision for income taxes	2,490	1,435	6,794	5,205
Net loss	$ (29,817)	$ (31,450)	$ (105,250)	$ (173,192)
Basic net loss per common share (in dollars per share)	$ (0.30)	$ (0.33)	$ (1.06)	$ (1.82)
Diluted net loss per potential common share (in dollars per share)	$ (0.30)	$ (0.33)	$ (1.06)	$ (1.82)
Weighted average basic common shares outstanding (in shares)	99,530	96,313	98,922	95,389
Weighted average dilutive potential common shares outstanding (in shares)	99,530	96,313	98,922	95,389