CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	May 31, 2012	May 31, 2011
Operating activities:
Net income	$ 47,176	$ 37,105
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of property and equipment	7,050	6,310
Amortization of acquired intangible assets	17,365	19,664
Amortization of debt discount and transaction costs	2,210	386
Stock-based compensation	29,718	23,268
Deferred income tax	(9,281)	(9,342)
Tax benefits related to stock benefit plans	9,406	10,739
Excess tax benefits from stock-based compensation	(16,484)	(26,737)
Other non-cash adjustments, net	531	(146)
Changes in assets and liabilities, net of acquisitions:
Accounts receivable	16,751	17,516
Prepaid expenses and other assets	4,290	3,237
Accounts payable	(981)	(1,222)
Accrued liabilities and restructuring costs	(20,373)	(21,504)
Deferred revenue	29,563	24,064
Net cash provided by operating activities	116,941	83,338
Investing activities:
Acquisitions, net of cash acquired	(131,611)	(22,579)
Purchases of property and equipment	(11,224)	(3,837)
Restricted cash pledged as security	(1,149)	(1,852)
Other investing activities, net	414	1,348
Net cash used in investing activities	(143,570)	(26,920)
Financing activities:
Proceeds from issuance of convertible debt, net	584,450
Proceeds from revolving credit facility, net	116,648
Principal payments on debt	(151,182)	(1,119)
Proceeds from issuance of common stock	17,298	33,324
Repurchases of the Company's common stock	(188,508)	(72,329)
Withholding taxes related to restricted stock net share settlement	(15,116)	(15,024)
Excess tax benefits from stock-based compensation	16,484	26,737
Net cash provided by (used in) financing activities	380,074	(28,411)
Effect of foreign exchange rate changes on cash and cash equivalents	(14,489)	6,491
Net increase in cash and cash equivalents	338,956	34,498
Cash and cash equivalents at beginning of period	308,148	243,989
Cash and cash equivalents at end of period	647,104	278,487
Supplemental disclosures:
Interest paid	2,027	1,473
Income taxes paid	$ 1,268	$ 7,466