Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	May 31, 2014	May 31, 2013
Cash flows from operating activities:
Net income	$ 23,899	$ 35,028
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization of property and equipment	4,887	5,567
Amortization of acquired intangibles and other	2,160	1,910
Stock-based compensation	11,254	10,787
Loss on disposal of property	33	0
Gain on dispositions	0	(35,106)
Asset impairment	0	111
Deferred income taxes	466	(750)
Tax deficiency from stock plans	(172)	(806)
Excess tax benefit from stock plans	(160)	(721)
Allowances for accounts receivable	208	(35)
Changes in operating assets and liabilities:
Accounts receivable	8,914	21,410
Other assets	6,815	(4,930)
Accounts payable and accrued liabilities	(19,061)	(23,298)
Income taxes payable and uncertain tax positions	410	(22,534)
Deferred revenue	2,887	1,949
Net cash flows from (used in) operating activities	42,540	(11,418)
Cash flows from investing activities:
Purchases of investments	(1,900)	0
Sales and maturities of investments	9,435	15,210
Redemptions and sales of auction rate securities	0	25
Purchases of property and equipment	(6,099)	(2,386)
Capitalized software development costs	(1,938)	0
Payments for acquisitions, net of cash acquired	12,493	9,450
Proceeds from divestitures, net	3,300	73,381
Increase in other noncurrent assets	104	172
Net cash flows (used in) from investing activities	(9,591)	76,952
Cash flows from financing activities:
Proceeds from stock-based compensation plans	6,904	32,443
Purchases of common stock related to withholding taxes from the issuance of restricted stock units	(3,141)	(1,915)
Repurchases of common stock	(34,999)	(176,537)
Excess tax benefit from stock plans	160	721
Payment of contingent consideration	210	0
Net cash flows used in financing activities	(31,286)	(145,288)
Effect of exchange rate changes on cash	1,490	(3,651)
Net increase (decrease) in cash and cash equivalents	3,153	(83,405)
Cash and cash equivalents, beginning of period	198,818	301,792
Cash and cash equivalents, end of period	201,971	218,387
Supplemental disclosure:
Cash paid for income taxes, net of refunds of $153 in 2014 and $1,812 in 2013	3,831	52,266
Non-cash financing activities:
Total fair value of restricted stock awards, restricted stock units and deferred stock units on date vested	$ 10,494	$ 7,592