Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011
Operating Activities
Net income	$ 238,518		$ 246,931
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of intangible assets	82,064	[1]	51,796	[1]
Depreciation and amortization of property and equipment	71,991		63,798
Stock-based compensation expense	108,922		63,591
(Gain) Loss on investments	(13,378)		1,021
Provision for doubtful accounts	829		439
Provision for product returns	8,703		3,827
Provision for inventory reserves	923		1,396
Tax effect of stock-based compensation	30,380		39,771
Excess tax benefit from exercise of stock options	(31,976)		(39,868)
Effects of exchange rate changes on monetary assets and liabilities denominated in foreign currencies	(882)		788
Other non-cash items	981		4,663
Total adjustments to reconcile net income to net cash provided by operating activities	258,557		191,222
Changes in operating assets and liabilities, net of the effects of acquisitions:
Accounts receivable	70,485		41,194
Inventories	(2,163)		(1,440)
Prepaid expenses and other current assets	(27,114)		(6,703)
Other assets	2,392		5,339
Deferred tax assets, net	11,142		(18,285)
Accounts payable	(7,051)		(12,267)
Accrued expenses and other current liabilities	18,226		(21,059)
Deferred revenues	72,816		46,657
Deferred tax liabilities, net	(43,733)		28,854
Other liabilities	(269)		9,116
Total changes in operating assets and liabilities, net of the effects of acquisitions	94,731		71,406
Net cash provided by operating activities	591,806		509,559
Investing Activities
Purchases of available for-sale investments	(1,189,868)		(968,184)
Proceeds from sales of available-for-sale investments	891,008		545,622
Proceeds from maturities of available-for-sale investments	356,893		487,406
Purchases of property and equipment	(87,290)		(88,855)
Proceeds from the sale of cost method investments	21,413		0
Purchases of cost method investments	(5,149)		(15,818)
Cash paid for acquisitions, net of cash acquired	(488,347)		(309,472)
Cash paid for licensing agreements and product related intangible assets	(14,277)		(13,164)
Other	3,450		0
Net cash (used in) provided by investing activities	(512,167)		(362,465)
Financing Activities
Proceeds from issuance of common stock under stock-based compensation plans	95,796		94,827
Repayment of acquired debt	(24,346)		(11,561)
Excess tax benefit from exercise of stock options	31,976		39,868
Purchase of non-controlling interest	0		(17,207)
Stock repurchases, net	(174,951)		(324,897)
Cash paid for tax withholding on vested stock awards	(17,524)		(12,182)
Other	1,050		(3,000)
Net cash used in financing activities	(87,999)		(234,152)
Effect of exchange rate changes on cash and cash equivalents	(809)		3,026
Change in cash and cash equivalents	(9,169)		(84,032)
Cash and cash equivalents at beginning of period	333,296		396,162
Cash and cash equivalents at end of period	$ 324,127		$ 312,130

[1] Represents expenses presented to management on a consolidated basis only and not allocated to the operating segments.