CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	May 31, 2013	May 31, 2012
Operating activities:
Net income	$ 18,319	$ 47,176
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of property and equipment	7,839	7,050
Amortization of acquired intangible assets	17,377	17,365
Amortization of debt discount and transaction costs	9,460	2,210
Stock-based compensation	31,335	29,718
Deferred income tax	(15,007)	(9,281)
Tax benefits related to stock benefit plans	5,278	9,406
Excess tax benefits from stock-based compensation	(7,139)	(16,484)
Other non-cash adjustments, net	506	531
Changes in assets and liabilities, net of acquisitions:
Accounts receivable	43,573	16,751
Prepaid expenses and other assets	(2,633)	4,290
Accounts payable	10,698	(981)
Accrued liabilities and restructuring costs	(17,264)	(20,373)
Deferred revenue	(14,264)	29,563
Net cash provided by operating activities	88,078	116,941
Investing activities:
Purchases of short-term investments	(38,261)	0
Maturities and sales of short-term investments	8,829	0
Acquisition, net of cash acquired	(4,261)	(131,611)
Purchases of property and equipment	(5,768)	(11,224)
Restricted cash pledged as security	(668)	(1,149)
Other investing activities, net	288	414
Net cash used in investing activities	(39,841)	(143,570)
Financing activities:
Proceeds from issuance of convertible debt, net	0	584,450
Proceeds from revolving credit facility, net	0	116,648
Principal payments on debt	(35,711)	(151,182)
Proceeds from issuance of common stock	9,255	17,298
Repurchases of the Company’s common stock	(81,208)	(188,508)
Withholding taxes related to restricted stock net share settlement	(9,899)	(15,116)
Excess tax benefits from stock-based compensation	7,139	16,484
Net cash provided by (used in) financing activities	(110,424)	380,074
Effect of foreign exchange rate changes on cash and cash equivalents	(2,353)	(14,489)
Net increase (decrease) in cash and cash equivalents	(64,540)	338,956
Cash and cash equivalents at beginning of period	727,309	308,148
Cash and cash equivalents at end of period	662,769	647,104
Supplemental disclosures:
Interest paid	7,475	2,027
Income taxes paid	$ 10,767	$ 1,268