Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013
Revenue:
Products	$ 495,889	$ 437,442	$ 1,389,651	$ 1,203,716
Services	107,673	100,914	307,675	295,445
Total revenue	603,562	538,356	1,697,326	1,499,161
Cost of goods sold:
Products	275,003	247,768	777,851	683,730
Services	64,586	62,367	191,960	181,902
Total cost of goods sold	339,589	310,135	969,811	865,632
Gross profit	263,973	228,221	727,515	633,529
Operating expenses:
Research and development	97,685	93,069	302,674	282,981
Selling and marketing	81,919	75,613	243,929	216,676
General and administrative	36,285	32,066	98,264	91,157
Amortization of intangible assets	11,019	12,440	34,951	37,332
Restructuring costs	63	202	178	6,741
Total operating expenses	226,971	213,390	679,996	634,887
Income (loss) from operations	37,002	14,831	47,519	(1,358)
Interest and other income (loss), net	(6,328)	(3,167)	(14,231)	(6,020)
Interest expense	(11,508)	(10,972)	(33,556)	(33,096)
Loss on extinguishment of debt	0	0	0	(28,630)
Income (loss) before income taxes	19,166	692	(268)	(69,104)
Provision for income taxes	3,006	1,923	9,666	6,530
Net income (loss)	$ 16,160	$ (1,231)	$ (9,934)	$ (75,634)
Basic net income (loss) per common share (in dollars per share)	$ 0.15	$ (0.01)	$ (0.09)	$ (0.74)
Diluted net income (loss) per potential common share (in dollars per share)	$ 0.15	$ (0.01)	$ (0.09)	$ (0.74)
Weighted average basic common shares outstanding	106,236	102,713	105,404	101,951
Weighted average dilutive potential common shares outstanding	120,809	102,713	105,404	101,951