CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
OPERATING ACTIVITIES:
Net income	$ 833,175	$ 393,031
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	14,801	12,068
Amortization	25,286	24,193
Provision for uncollectible accounts, net	7,641	5,737
Deferred income taxes	34,170	33,650
Stock-based compensation expense and other stock-based payments	40,756	48,628
Amortization of debt issuance costs	1,676	2,785
Amortization of debt discount	15,944	14,948
Loss on early extinguishment of debt	32	11,334
Changes in assets and liabilities:
Accounts receivable	(202,087)	(112,755)
Prepaid expenses and other current assets	5,981	(8,034)
Accounts payable, accrued expenses and other current liabilities	292,160	169,898
Other	(9,564)	1,897
Net cash provided by operating activities	1,059,971	597,380
INVESTING ACTIVITIES:
Purchase of investments	(2,230,661)	(1,030,011)
Proceeds from sale of investments	1,529,998	665,925
Additions to property and equipment	(29,770)	(14,471)
Acquisitions and other equity investments, net of cash acquired	(67,973)	(110,972)
Proceeds from settlement of foreign currency contracts	5,205	44,564
Payments on foreign currency contracts	(42,032)	(4,283)
Change in restricted cash	(2,920)	156
Net cash used in investing activities	(838,153)	(449,092)
FINANCING ACTIVITIES:
Proceeds from the issuance of convertible debt		575,000
Payment of debt issuance costs		(13,334)
Payments related to conversion of convertible debt	(213)	(295,398)
Repurchase of common stock	(162,369)	(125,653)
Payments to purchase subsidiary shares from noncontrolling interests	(12,986)
Proceeds from the sale of subsidiary shares to noncontrolling interests		4,311
Proceeds from exercise of stock options	3,991	24,623
Excess tax benefit on stock-based compensation	14,996	4,975
Net cash (used in) provided by financing activities	(156,581)	174,524
Effect of exchange rate changes on cash and cash equivalents	(3,038)	8,168
Net increase in cash and cash equivalents	62,199	330,980
Cash and cash equivalents, beginning of period	358,967	202,141
Cash and cash equivalents, end of period	421,166	533,121
SUPPLEMENTAL CASH FLOW INFORMATION:
Cash paid during the period for income taxes	99,376	61,568
Cash paid during the period for interest	7,443	4,639
Non-cash fair value increase for redeemable noncontrolling interests	$ 41,327	$ 4,118