CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Aug. 31, 2013	Aug. 31, 2012
Operating activities:
Net income	$ 39,619	$ 73,275
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of property and equipment	11,616	10,992
Amortization of acquired intangible assets	26,965	26,719
Amortization of debt discount and transaction costs	14,258	6,820
Stock-based compensation	39,245	45,130
Deferred income tax	(13,292)	(20,183)
Tax benefits related to stock benefit plans	9,691	14,455
Excess tax benefits from stock-based compensation	(13,442)	(20,612)
Other non-cash adjustments, net	1,179	905
Changes in assets and liabilities, net of acquisitions:
Accounts receivable	49,181	(12,079)
Prepaid expenses and other assets	(19,568)	(8,975)
Accounts payable	7,207	159
Accrued liabilities and restructuring costs	4,864	(5,576)
Deferred revenue	(11,119)	54,285
Net cash provided by operating activities	146,404	165,315
Investing activities:
Purchases of short-term investments	(38,261)	0
Maturities and sales of short-term investments	15,346	0
Acquisition, net of cash acquired	(53,917)	(132,209)
Purchases of property and equipment	(10,695)	(16,366)
Restricted cash pledged as security	(835)	(1,169)
Other investing activities, net	(212)	376
Net cash used in investing activities	(88,574)	(149,368)
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)	(151,785)
Proceeds from issuance of common stock	23,089	25,390
Repurchases of the Company’s common stock	(105,289)	(220,265)
Withholding taxes related to restricted stock net share settlement	(12,467)	(17,383)
Excess tax benefits from stock-based compensation	13,442	20,612
Net cash provided by (used in) financing activities	(116,936)	357,667
Effect of foreign exchange rate changes on cash and cash equivalents	(1,992)	(6,488)
Net increase (decrease) in cash and cash equivalents	(61,098)	367,126
Cash and cash equivalents at beginning of period	727,309	308,148
Cash and cash equivalents at end of period	666,211	675,274
Supplemental disclosures:
Interest paid	7,712	2,714
Income taxes paid	$ 19,670	$ 4,234