CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2016	Apr. 30, 2015
Revenue:
Products	$ 523,978	$ 511,880	$ 981,567	$ 934,195
Services	116,739	109,722	232,265	216,569
Total revenue	640,717	621,602	1,213,832	1,150,764
Cost of goods sold:
Products	291,778	286,898	552,260	523,446
Services	65,846	62,293	127,029	124,612
Total cost of goods sold	357,624	349,191	679,289	648,058
Gross profit	283,093	272,411	534,543	502,706
Operating expenses:
Research and development	114,603	105,202	222,649	205,963
Selling and marketing	86,668	82,471	169,146	159,183
General and administrative	35,203	30,302	66,345	59,855
Acquisition and integration costs	2,285	1,020	3,584	1,020
Amortization of intangible assets	15,566	11,019	32,428	22,038
Restructuring costs	535	(17)	919	8,068
Total operating expenses	254,860	229,997	495,071	456,127
Income from operations	28,233	42,414	39,472	46,579
Interest and other income (loss), net	967	(5,549)	(7,809)	(13,782)
Interest expense	(12,608)	(12,947)	(25,318)	(26,608)
Income before income taxes	16,592	23,918	6,345	6,189
Provision for income taxes	2,595	3,265	3,894	4,315
Net income	$ 13,997	$ 20,653	$ 2,451	$ 1,874
Basic net income per common share (in dollars per share)	$ 0.10	$ 0.18	$ 0.02	$ 0.02
Diluted net income per potential common share (in dollars per share)	$ 0.10	$ 0.17	$ 0.02	$ 0.02
Weighted average basic common shares outstanding (in shares)	137,950	113,555	137,313	110,578
Weighted average diluted common shares outstanding (in shares)	138,889	128,017	138,693	111,762