Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Nov. 30, 2013	Nov. 30, 2012	Nov. 30, 2011
Cash flows from operating activities:
Net income	$ 74,907	$ 47,444	$ 59,629
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of property and equipment	10,345	9,305	8,832
Amortization of acquired intangibles and other	4,090	21,660	26,246
Stock-based compensation	21,399	28,233	25,999
Gain on sale of dispositions	(71,601)	(45,105)	0
Impairment loss on assets held for sale	0	8,601	0
Loss on sale of auction rate security	380	270	0
Loss on disposal of property and equipment	448	0	114
Asset impairment	111	898	0
Deferred income taxes	9,745	(22)	2,468
Tax benefit from stock plans	(484)	171	6,165
Excess tax benefits from stock plans	(1,642)	(1,590)	(6,238)
Allowances for accounts receivable	874	1,140	1,963
Changes in operating assets and liabilities:
Accounts receivable	5,672	14,373	8,053
Other assets	(9,035)	1,547	2,709
Accounts payable and accrued liabilities	(15,152)	7,484	(24,679)
Income taxes payable and uncertain tax positions	(20,294)	17,617	9,640
Deferred revenue	(5,183)	(7,911)	5,393
Net cash flows from operating activities	4,580	104,115	126,294
Cash flows from investing activities:
Purchases of investments	(7,745)	(27,924)	(152,658)
Sales and maturities of investments	28,753	74,065	84,441
Redemptions and sales of auction rate securities - available-for-sale	25	8,955	6,300
Purchases of property and equipment	(4,226)	(7,735)	(17,047)
Capitalized software development costs	(836)	0	0
Payments for acquisitions, net of cash acquired	(9,450)	0	(22,900)
Proceeds from divestitures, net	111,120	46,590	0
Decrease (increase) in other noncurrent assets	1,121	189	(433)
Net cash flows from investing activities	118,762	94,140	(102,297)
Cash flows from financing activities:
Proceeds from stock-based compensation plans	54,430	29,208	49,672
Purchase of common stock related to withholding taxes from issuance of restricted stock units	(4,936)	(4,153)	(2,706)
Repurchase of common stock	(276,537)	(81,316)	(200,009)
Excess tax benefit from stock plans	1,642	1,590	6,238
Payment of long-term debt	0	(357)	(388)
Payment of issuance costs for line of credit	0	0	(795)
Net cash flows from financing activities	(225,401)	(55,028)	(147,988)
Effect of exchange rate changes on cash	(915)	(2,530)	(1,473)
Net (decrease) increase in cash and equivalents	(102,974)	140,697	(125,464)
Cash and equivalents, beginning of year	301,792	161,095	286,559
Cash and equivalents, end of year	198,818	301,792	161,095
Supplemental disclosure:
Cash paid for income taxes, net of refunds of $4,453 in 2013, $1,987 in 2012 and $9,183 in 2011	69,939	15,337	9,545
Non-cash financing activity:
Total fair value of restricted stock awards, restricted stock units and deferred stock units on date vested	16,758	13,886	9,160
Unsettled repurchases of common stock	$ 0	$ 7,068	$ 0