Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Cash flows from operating activities:
Net income	$ 1,261,953	$ 72,584	$ 11,667
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of equipment, building, furniture and fixtures, and amortization of leasehold improvements	77,189	63,394	55,901
Share-based compensation costs	48,360	51,993	55,340
Amortization of intangible assets	45,713	78,298	79,866
Deferred taxes	(1,126,732)	(1,116)	0
Provision for doubtful accounts	18,221	1,701	1,576
Provision for inventory excess and obsolescence	35,459	33,713	26,846
Provision for warranty	7,965	15,483	17,881
Other	22,417	24,929	25,797
Changes in assets and liabilities:
Accounts receivable	(66,123)	(26,074)	(37,297)
Inventories	(91,567)	(53,000)	46,898
Prepaid expenses and other	(33,834)	30,047	(46,383)
Accounts payable, accruals and other obligations	33,897	7,153	(10,505)
Deferred revenue	1,964	(9,585)	34,525
Net cash provided by operating activities	234,882	289,520	262,112
Cash flows used in investing activities:
Payments for equipment, furniture, fixtures and intellectual property	(94,600)	(107,185)	(62,109)
Restricted cash	(54)	11	(40)
Purchase of available for sale securities	(299,038)	(365,191)	(245,323)
Proceeds from maturities of available for sale securities	335,075	230,612	205,000
Purchase of cost method investment	0	(4,000)	(2,000)
Settlement of foreign currency forward contracts, net	(2,810)	(18,506)	24,133
Acquisition of business, net of cash acquired	0	(32,000)	37,212
Net cash used in investing activities	(61,427)	(296,259)	(43,127)
Cash flows from financing activities:
Proceeds from issuance of long-term debt, net	0	248,750	0
Payment of long-term debt	(233,554)	(266,116)	(29,867)
Payment for modification of term loans	(93,625)	0	0
Payment of debt and equity issuance costs	(722)	(3,987)	(421)
Payment of capital lease obligations	(3,562)	(5,966)	(8,038)
Proceeds from issuance of common stock	20,412	23,091	30,275
Net cash used in financing activities	(311,051)	(4,228)	(8,051)
Effect of exchange rate changes on cash and cash equivalents	494	(2,389)	(6,683)
Net increase (decrease) in cash and cash equivalents	(137,102)	(13,356)	204,251
Cash and cash equivalents at beginning of fiscal year	777,615	790,971	586,720
Cash and cash equivalents at end of fiscal year	640,513	777,615	790,971
Supplemental disclosure of cash flow information
Cash paid during the fiscal year for interest	47,235	46,897	40,772
Cash paid during the fiscal year for income taxes, net	22,136	15,268	10,668
Non-cash investing activities
Purchase of equipment in accounts payable	6,214	15,030	20,922
Construction in progress subject to build-to-suit lease	0	39,914	18,663
Non-cash financing activities
Fair value of shares issued related to acquisition of business	0	0	302,114
4.0% Convertible Senior Notes due March 15, 2015
Non-cash financing activities
Conversion of 4.0% convertible senior notes, due March 15, 2015 into 8,898,387 shares of common stock and 8.0% convertible senior notes, due December 15, 2019 assumed from the Cyan acquisition, into 4,589,626 shares of common stock	0	0	180,645
8.0% Cyan Convertible Senior Notes due 2019
Non-cash financing activities
Conversion of 4.0% convertible senior notes, due March 15, 2015 into 8,898,387 shares of common stock and 8.0% convertible senior notes, due December 15, 2019 assumed from the Cyan acquisition, into 4,589,626 shares of common stock	0	0	117,140
Equipment
Non-cash investing activities
Equipment acquired under and building subject to capital lease	0	5,322	464
Building
Non-cash investing activities
Equipment acquired under and building subject to capital lease	$ 50,370	$ 8,993	$ 14,939