Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
12 Months Ended
Oct. 31, 2018
Oct. 31, 2017
Oct. 31, 2016
Cash flows from operating activities:      
Net income (loss) $ (344,690) $ 1,261,953 $ 72,584
Adjustments to reconcile net income (loss) to net cash provided by operating activities:      
Loss on extinguishment of debt 10,039 0 0
Loss on fair value of debt conversion liability 12,070 0 0
Depreciation of equipment, building, furniture and fixtures, and amortization of leasehold improvements 84,214 77,189 63,394
Share-based compensation costs 52,972 48,360 51,993
Amortization of intangible assets 25,806 45,713 78,298
Deferred taxes 463,631 (1,126,732) (1,116)
Provision for doubtful accounts 2,700 18,221 1,701
Provision for inventory excess and obsolescence 30,615 35,459 33,713
Provision for warranty 20,992 7,965 15,483
Other 21,685 22,417 24,929
Changes in assets and liabilities:      
Accounts receivable (168,357) (66,123) (26,074)
Inventories (27,445) (91,567) (53,000)
Prepaid expenses and other (21,425) (33,834) 30,047
Accounts payable, accruals and other obligations 85,798 33,897 7,153
Deferred revenue (19,344) 1,964 (9,585)
Net cash provided by operating activities 229,261 234,882 289,520
Cash flows used in investing activities:      
Payments for equipment, furniture, fixtures and intellectual property (67,616) (94,600) (107,185)
Restricted cash 117 (54) 11
Purchase of available for sale securities (286,824) (299,038) (365,191)
Proceeds from maturities of available for sale securities 410,109 335,075 230,612
Purchase of cost method investment (1,767) 0 (4,000)
Settlement of foreign currency forward contracts, net 9,385 (2,810) (18,506)
Acquisition of businesses, net of cash acquired (82,670) 0 (32,000)
Net cash used in investing activities (19,266) (61,427) (296,259)
Cash flows from financing activities:      
Proceeds from issuance of long-term debt, net 305,125 0 248,750
Payment of long-term debt (292,730) (233,554) (266,116)
Payment for make-whole provision upon conversion of long-term debt (13,453) 0 0
Payment for modification of term loans 0 (93,625) 0
Payment of debt issuance costs (1,936) (722) (3,987)
Payment of capital lease obligations (3,624) (3,562) (5,966)
Shares repurchased for tax withholdings on vesting of restricted stock units (4,757) 0 0
Repurchases of common stock - repurchase program (110,981) 0 0
Proceeds from issuance of common stock 23,127 20,412 23,091
Net cash used in financing activities (99,229) (311,051) (4,228)
Effect of exchange rate changes on cash and cash equivalents (5,856) 494 (2,389)
Net increase (decrease) in cash and cash equivalents 104,910 (137,102) (13,356)
Cash and cash equivalents at beginning of fiscal year 640,513 777,615 790,971
Cash and cash equivalents at end of fiscal year 745,423 640,513 777,615
Supplemental disclosure of cash flow information      
Cash paid during the fiscal year for interest 44,750 47,235 46,897
Cash paid during the fiscal year for income taxes, net 26,900 22,136 15,268
Non-cash investing and financing activities      
Purchase of equipment in accounts payable 5,118 6,214 15,030
Construction in progress subject to build-to-suit lease 0 0 39,914
Contingent consideration for acquisition of business 10,900 0 0
3.75% Convertible Senior Notes due October 15, 2018      
Non-cash investing and financing activities      
Conversion of convertible senior notes 61,270 0 0
4.0% Convertible Senior Notes due March 15, 2015      
Non-cash investing and financing activities      
Conversion of convertible senior notes 214,286 0 0
Equipment      
Non-cash investing and financing activities      
Equipment acquired under and building subject to capital lease 0 0 5,322
Building      
Non-cash investing and financing activities      
Equipment acquired under and building subject to capital lease $ 0 $ 50,370 $ 8,993