CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Feb. 28, 2014	Feb. 28, 2013
Operating activities:
Net income	$ 12,172	$ 9,533
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of property and equipment	4,688	3,863
Amortization of acquired intangible assets	10,031	8,418
Amortization of debt discount and transaction costs	4,907	4,713
Stock-based compensation	12,763	16,392
Deferred income tax	424	(9,188)
Tax benefits related to stock benefit plans	1,162	4,486
Excess tax benefits from stock-based compensation	(1,057)	(3,257)
Other non-cash adjustments, net	191	139
Changes in assets and liabilities, net of acquisitions:
Accounts receivable	26,292	63,733
Prepaid expenses and other assets	(3,943)	(2,426)
Accounts payable	(726)	1,953
Accrued liabilities and restructuring costs	(24,591)	(23,383)
Deferred revenue	10,556	(11,752)
Net cash provided by operating activities	52,869	63,224
Investing activities:
Purchases of short-term investments	(165,998)	0
Maturities and sales of short-term investments	16,373	51
Acquisition purchase price adjustment	0	2,280
Purchases of property and equipment	(7,472)	(2,586)
Restricted cash pledged as security	629	(322)
Net cash used in investing activities	(156,468)	(577)
Financing activities:
Principal payments on debt	0	(620)
Proceeds from issuance of common stock	2,991	6,086
Repurchases of the Company’s common stock	(35,799)	(21,871)
Withholding taxes related to restricted stock net share settlement	(4,276)	(4,890)
Excess tax benefits from stock-based compensation	1,057	3,257
Net cash used in financing activities	(36,027)	(18,038)
Effect of foreign exchange rate changes on cash and cash equivalents	2,479	506
Net increase (decrease) in cash and cash equivalents	(137,147)	45,115
Cash and cash equivalents at beginning of period	662,109	727,309
Cash and cash equivalents at end of period	524,962	772,424
Supplemental disclosures:
Interest paid	272	485
Income taxes paid	$ 4,084	$ 6,371