Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	May 31, 2013	May 31, 2012
Cash flows from operating activities:
Net income	$ 35,028	$ 5,581
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of property and equipment	5,567	4,640
Amortization of acquired intangibles and other	1,910	12,339
Stock-based compensation	10,787	13,760
Gain on dispositions	(35,106)	0
Asset impairment	111	848
Deferred income taxes	(750)	82
Tax (deficiency) benefit from stock plans	(806)	801
Excess tax benefit from stock plans	(721)	(1,171)
Allowances for accounts receivable	(35)	443
Changes in operating assets and liabilities:
Accounts receivable	21,410	23,262
Other assets	(4,930)	(3,891)
Accounts payable and accrued liabilities	(23,298)	5,614
Income taxes payable and uncertain tax positions	(22,534)	(10,844)
Deferred revenue	1,949	2,225
Net cash flows (used in) from operating activities	(11,418)	53,689
Cash flows from investing activities:
Purchases of investments	0	(25,887)
Sales and maturities of investments	15,210	44,855
Redemptions and sales of auction rate securities	25	225
Purchases of property and equipment	(2,386)	(6,141)
Payments for acquisitions, net of cash acquired	(9,450)	0
Proceeds from divestitures, net	73,381	0
Increase in other noncurrent assets	172	(52)
Net cash flows from investing activities	76,952	13,000
Cash flows from financing activities:
Proceeds from stock-based compensation plans	32,443	20,487
Purchases of common stock related to withholding taxes from the issuance of restricted stock units	(1,915)	(2,452)
Repurchases of common stock	(176,537)	0
Excess tax benefit from stock plans	721	1,171
Payment of long-term debt	0	(286)
Net cash flows (used in) from financing activities	(145,288)	18,920
Effect of exchange rate changes on cash	(3,651)	(4,820)
Net (decrease) increase in cash and cash equivalents	(83,405)	80,789
Cash and cash equivalents, beginning of period	301,792	161,095
Cash and cash equivalents, end of period	218,387	241,884
Supplemental disclosure:
Cash paid for income taxes, net of refunds of $1,812 in 2013 and $127 in 2012	52,266	12,558
Non-cash financing activities:
Total fair value of restricted stock awards, restricted stock units and deferred stock units on date vested	$ 7,592	$ 7,638