CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Jan. 31, 2017	Jan. 31, 2016
Revenue:
Products	$ 506,993	$ 457,589
Services	114,504	115,526
Total revenue	621,497	573,115
Cost of goods sold:
Products	286,811	260,482
Services	60,901	61,183
Total cost of goods sold	347,712	321,665
Gross profit	273,785	251,450
Operating expenses:
Research and development	116,869	108,046
Selling and marketing	85,002	82,478
General and administrative	35,864	31,142
Acquisition and integration costs	0	1,299
Amortization of intangible assets	14,551	16,862
Restructuring costs	2,395	384
Total operating expenses	254,681	240,211
Income from operations	19,104	11,239
Interest and other income (loss), net	370	(8,776)
Interest expense	(15,203)	(12,710)
Income (loss) before income taxes	4,271	(10,247)
Provision for income taxes	410	1,299
Net income (loss)	$ 3,861	$ (11,546)
Basic net income (loss) per common share (in dollars per share)	$ 0.03	$ (0.08)
Diluted net income (loss) per potential common share (in dollars per share)	$ 0.03	$ (0.08)
Weighted average basic common shares outstanding (in shares)	140,682	136,675
Weighted average dilutive potential common shares outstanding (in shares)	142,184	136,675