CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016
Revenue:
Products	$ 584,630	$ 523,978	$ 1,091,623	$ 981,567
Services	122,392	116,739	236,896	232,265
Total revenue	707,022	640,717	1,328,519	1,213,832
Cost of goods sold:
Products	327,295	291,778	614,106	552,260
Services	61,487	65,846	122,388	127,029
Total cost of goods sold	388,782	357,624	736,494	679,289
Gross profit	318,240	283,093	592,025	534,543
Operating expenses:
Research and development	121,623	114,603	238,492	222,649
Selling and marketing	88,551	86,668	173,553	169,146
General and administrative	34,990	35,203	70,854	66,345
Amortization of intangible assets	10,980	15,566	25,531	32,428
Acquisition and integration costs	0	2,285	0	3,584
Restructuring costs	4,276	535	6,671	919
Total operating expenses	260,420	254,860	515,101	495,071
Income from operations	57,820	28,233	76,924	39,472
Interest and other income (loss), net	(2,918)	967	(2,548)	(7,809)
Interest expense	(13,308)	(12,608)	(28,511)	(25,318)
Income before income taxes	41,594	16,592	45,865	6,345
Provision for income taxes	3,568	2,595	3,978	3,894
Net income	$ 38,026	$ 13,997	$ 41,887	$ 2,451
Basic net income per common share (in dollars per share)	$ 0.27	$ 0.10	$ 0.30	$ 0.02
Diluted net income per potential common share (in dollars per share)	$ 0.25	$ 0.10	$ 0.29	$ 0.02
Weighted average basic common shares outstanding (in shares)	141,743	137,950	141,223	137,313
Weighted average dilutive potential common shares outstanding (in shares)	165,273	138,889	147,842	138,693