Unaudited Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2016		Jan. 31, 2015
Cash flow from operating activities:
Net income	$ 60,035		$ 65,189
Adjustments to reconcile net income to net cash used in operating activities:
Amortization and depreciation	56,436		50,529
Stock compensation	23,013		20,581
Allowance for doubtful accounts	250		300
(Gain) loss on sale of investments	3		(12)
Excess tax benefits from stock-based compensation	(440)		0
Deferred income taxes	(3,955)		(158)
Net changes in operating assets and liabilities, net of acquired assets and liabilities:
Accounts receivable	30,365		40,857
Prepaid and other current assets	(27,825)		(42,860)
Other long-term assets	9,008		(7,597)
Accounts payable and accrued liabilities	(145,229)		(125,320)
Income taxes	(4,734)		(14,024)
Deferred revenue	(32,097)		(74,828)
Net cash used in operating activities	(35,170)		(87,343)
Cash flows from investing activities:
Proceeds from sales and maturities of short-term investments	40,489		8,012
Purchases of short-term investments	(34,933)		(128,427)
Proceeds from sales of long-term investments	161		0
Purchases of property and equipment	(15,337)		(19,607)
Cash paid for acquisitions and intangible assets, net of cash acquired	(18,941)		0
Capitalization of software development costs	(920)		(909)
Net cash used in investing activities	(29,481)		(140,931)
Cash flows from financing activities:
Proceeds from credit facility	30,000		250,000
Repayment of debt	(7,500)		(22,723)
Issuances of common stock	(3,725)		10,542
Purchase of equity forward contract	(40,000)		(36,000)
Purchases of treasury stock	(160,000)		(144,000)
Excess tax benefits from stock-based compensation	440		0
Other	(1,470)		(14)
Net cash provided by (used in) financing activities	(182,255)		57,805
Effect of exchange rate changes on cash and cash equivalents	(6,296)		(18,469)
Net change in cash and cash equivalents	(253,202)		(188,938)
Cash and cash equivalents, beginning of year	836,188	[1]	985,762
Cash and cash equivalents, end of period	$ 582,986		$ 796,824

[1] Derived from audited financial statements.