CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
Revenue:
Products	$ 610,742	$ 553,450	$ 1,702,365	$ 1,535,017
Services	117,977	117,100	354,873	349,365
Total revenue	728,719	670,550	2,057,238	1,884,382
Cost of goods sold:
Products	341,197	299,381	955,303	851,641
Services	59,446	62,684	181,834	189,713
Total cost of goods sold	400,643	362,065	1,137,137	1,041,354
Gross profit	328,076	308,485	920,101	843,028
Operating expenses:
Research and development	117,729	116,697	356,221	339,346
Selling and marketing	86,739	83,732	260,292	252,878
General and administrative	35,569	34,336	106,423	100,681
Amortization of intangible assets	3,837	14,529	29,368	46,957
Acquisition and integration costs	0	1,029	0	4,613
Restructuring costs	2,203	1,138	8,874	2,057
Total operating expenses	246,077	251,461	761,178	746,532
Income from operations	81,999	57,024	158,923	96,496
Interest and other income (loss), net	(848)	(3,647)	(3,396)	(11,456)
Interest expense	(13,415)	(15,967)	(41,926)	(41,285)
Income before income taxes	67,736	37,410	113,601	43,755
Provision for income taxes	7,726	3,864	11,704	7,758
Net income	$ 60,010	$ 33,546	$ 101,897	$ 35,997
Basic net income per common share (in dollars per share)	$ 0.42	$ 0.24	$ 0.72	$ 0.26
Diluted net income per potential common share (in dollars per share)	$ 0.39	$ 0.23	$ 0.69	$ 0.26
Weighted average basic common shares outstanding (in shares)	142,464	138,881	141,631	137,835
Weighted average dilutive potential common shares outstanding (in shares)	172,112	169,349	164,431	139,053