CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Apr. 30, 2017	Apr. 30, 2016
Cash flows provided by operating activities:
Net income	$ 41,887	$ 2,451
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	35,548	30,237
Share-based compensation costs	24,830	29,210
Amortization of intangible assets	33,466	40,488
Provision for inventory excess and obsolescence	19,623	20,104
Provision for warranty	2,347	9,563
Other	10,416	8,578
Changes in assets and liabilities:
Accounts receivable	9,381	(4,865)
Inventories	(95,554)	(19,022)
Prepaid expenses and other	(15,054)	(7,670)
Accounts payable, accruals and other obligations	(24,974)	(29,400)
Deferred revenue	3,832	(3,992)
Net cash provided by operating activities	45,748	75,682
Cash flows used in investing activities:
Payments for equipment, furniture, fixtures and intellectual property	(60,328)	(53,050)
Purchase of available for sale securities	(179,833)	(199,994)
Proceeds from maturities of available for sale securities	180,000	110,000
Settlement of foreign currency forward contracts, net	(2,965)	(4,834)
Acquisition of business, net of cash acquired	0	(32,000)
Net cash used in investing activities	(63,126)	(179,878)
Cash flows provided by (used in) financing activities:
Proceeds from issuance of term loan, net	0	248,750
Payment of long-term debt	(47,296)	(15,264)
Payment for modification of term loans	(93,625)	0
Payment of debt issuance costs	0	(3,778)
Payment of capital lease obligations	(1,528)	(3,769)
Proceeds from issuance of common stock	10,345	9,968
Net cash provided by (used in) financing activities	(132,104)	235,907
Effect of exchange rate changes on cash and cash equivalents	490	(649)
Net increase (decrease) in cash and cash equivalents	(148,992)	131,062
Cash and cash equivalents at beginning of period	777,615	790,971
Cash and cash equivalents at end of period	628,623	922,033
Supplemental disclosure of cash flow information
Cash paid during the period for interest	23,439	20,432
Cash paid during the period for income taxes, net	11,379	6,991
Non-cash investing activities
Purchase of equipment in accounts payable	3,818	11,437
Construction in progress subject to build-to-suit lease	0	21,606
Equipment
Non-cash investing activities
Equipment acquired under and building subject to capital lease	0	3,012
Building
Non-cash investing activities
Equipment acquired under and building subject to capital lease	$ 20,695	$ 8,993