Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Revenue:
Products	$ 525,609	$ 506,993
Services	120,526	114,504
Total revenue	646,135	621,497
Cost of goods sold:
Products	313,120	286,811
Services	61,250	60,901
Total cost of goods sold	374,370	347,712
Gross profit	271,765	273,785
Operating expenses:
Research and development	118,524	116,869
Selling and marketing	88,515	85,002
General and administrative	38,406	35,864
Amortization of intangible assets	3,623	14,551
Significant asset impairments and restructuring costs	5,961	2,395
Total operating expenses	255,029	254,681
Income from operations	16,736	19,104
Interest and other income (loss), net	1,575	370
Interest expense	(13,734)	(15,203)
Income before income taxes	4,577	4,271
Provision for income taxes	477,940	410
Net income (loss)	$ (473,363)	$ 3,861
Basic net income (loss) per common share	$ (3.29)	$ 0.03
Diluted net income (loss) per potential common share	$ (3.29)	$ 0.03
Weighted average basic common shares outstanding	143,922	140,682
Weighted average dilutive potential common shares outstanding	143,922	142,184