Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jan. 31, 2012	Jan. 31, 2011
Cash flow from operating activities:
Net income	$ 56,694	$ 48,226
Adjustments to reconcile net income to net cash used in operating activities:
Amortization and depreciation	31,965	31,676
Stock compensation	16,248	15,247
Allowance for doubtful accounts	497	550
Write-down of long-term investments		908
Deferred income taxes	14,533	3,371
Net changes in operating assets and liabilities, net of acquired assets and liabilities:
Accounts receivable	(11,102)	10,614
Prepaid and other current assets	(8,972)	(14,786)
Other long-term assets	(3,457)	(4,920)
Accounts payable and other liabilities	(93,556)	(83,276)
Income taxes	(5,161)	(16,829)
Deferred revenue	(37,007)	(30,414)
Net cash used in operating activities	(39,318)	(39,633)
Cash flows from investing activities:
Proceeds from sales and maturities of short-term investments	34,039	19,049
Purchases of short-term investments	(18,179)	(23,957)
Purchases of property and equipment	(11,016)	(10,217)
Cash paid for acquisitions and intangible assets, net of cash acquired	(5,623)	(2,741)
Capitalization of software development costs	(735)	(713)
Net cash used in investing activities	(1,514)	(18,579)
Cash flows from financing activities:
Principal payments on capital leases	(1,081)	(655)
Issuances of common stock	41,106	52,464
Purchase of equity forward contract	(20,000)
Purchases of treasury stock	(20,000)	(64,997)
Net cash provided by (used in) financing activities	25	(13,188)
Effect of exchange rate changes on cash and cash equivalents	(2,931)	(3,395)
Net change in cash and cash equivalents	(43,738)	(74,795)
Cash and cash equivalents, beginning of year	855,077	775,407
Cash and cash equivalents, end of period	$ 811,339	$ 700,612