CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2017	Jan. 31, 2016
Cash flows provided by operating activities:
Net income (loss)	$ 3,861	$ (11,546)
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation of equipment, building, furniture and fixtures, and amortization of leasehold improvements	16,699	14,449
Share-based compensation costs	12,825	14,477
Amortization of intangible assets	18,864	20,506
Provision for inventory excess and obsolescence	5,431	7,016
Provision for warranty	553	4,971
Other	4,452	11,087
Changes in assets and liabilities:
Accounts receivable	(21,956)	63,332
Inventories	(78,749)	(22,134)
Prepaid expenses and other	(1,004)	6,761
Accounts payable, accruals and other obligations	4,037	(80,014)
Deferred revenue	8,737	(13,925)
Net cash provided by (used in) operating activities	(26,250)	14,980
Cash flows used in investing activities:
Payments for equipment, furniture, fixtures and intellectual property	(25,706)	(28,873)
Purchase of available for sale securities	(89,897)	(134,869)
Proceeds from maturities of available for sale securities	95,000	30,000
Settlement of foreign currency forward contracts, net	440	(295)
Net cash used in investing activities	(20,163)	(134,037)
Cash flows provided by financing activities:
Payment of long-term debt	(46,296)	(14,639)
Payment of debt and equity issuance costs	0	(797)
Payment of capital lease obligations	(605)	(1,627)
Proceeds from issuance of common stock	9,708	8,870
Net cash used in financing activities	(37,193)	(8,193)
Effect of exchange rate changes on cash and cash equivalents	(156)	(3,400)
Net decrease in cash and cash equivalents	(83,762)	(130,650)
Cash and cash equivalents at beginning of period	777,615	790,971
Cash and cash equivalents at end of period	693,853	660,321
Supplemental disclosure of cash flow information
Cash paid during the period for interest	11,831	9,902
Cash paid during the period for income taxes, net	5,521	3,702
Non-cash investing activities
Purchase of equipment in accounts payable	5,293	8,782
Equipment acquired under capital lease	0	1,219
Construction in progress subject to build-to-suit lease	$ 0	$ 11,522