Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2013	Jul. 31, 2012
Revenue:
Products	$ 437,442	$ 373,418	$ 1,203,716	$ 1,091,817
Services	100,914	100,672	295,445	276,575
Total revenue	538,356	474,090	1,499,161	1,368,392
Cost of goods sold:
Products	247,768	225,238	683,730	657,362
Services	62,367	67,531	181,902	179,012
Total cost of goods sold	310,135	292,769	865,632	836,374
Gross profit	228,221	181,321	633,529	532,018
Operating expenses:
Research and development	93,069	88,315	282,981	268,378
Selling and marketing	75,613	65,397	216,676	192,325
General and administrative	32,066	27,876	91,157	84,210
Amortization of intangible assets	12,440	12,714	37,332	39,152
Restructuring costs	202	2,291	6,741	5,864
Total operating expenses	213,390	196,593	634,887	589,929
Income (loss) from operations	14,831	(15,272)	(1,358)	(57,911)
Interest and other income (loss), net	(3,167)	(2,458)	(6,020)	(11,732)
Interest expense	(10,972)	(9,597)	(33,096)	(28,813)
Loss on extinguishment of debt	0	0	(28,630)	0
Income (loss) before income taxes	692	(27,327)	(69,104)	(98,456)
Provision for income taxes	1,923	2,490	6,530	6,794
Net loss	$ (1,231)	$ (29,817)	$ (75,634)	$ (105,250)
Basic net loss per common share (in dollars per share)	$ (0.01)	$ (0.30)	$ (0.74)	$ (1.06)
Diluted net loss per potential common share (in dollars per share)	$ (0.01)	$ (0.30)	$ (0.74)	$ (1.06)
Weighted average basic common shares outstanding (in shares)	102,713	99,530	101,951	98,922
Weighted average dilutive potential common shares outstanding (in shares)	102,713	99,530	101,951	98,922