UNAUDITED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 1,192,075	$ 632,836
Restricted cash	4,458	3,771
Short-term investments	2,426,628	2,024,827
Accounts receivable, net of allowance for doubtful accounts of $7,214 and $6,103, respectively	324,562	264,453
Prepaid expenses and other current assets	201,740	104,202
Deferred income taxes	53,599	36,755
Total current assets	4,203,062	3,066,844
Property and equipment, net	73,520	64,322
Intangible assets, net	210,918	200,151
Goodwill	520,769	504,784
Deferred income taxes	43,245	111,080
Other assets	41,313	23,490
Total assets	5,092,827	3,970,671
Current liabilities:
Accounts payable	173,984	146,867
Accrued expenses and other current liabilities	298,217	222,134
Deferred merchant bookings	314,836	239,157
Convertible debt (see Note 8)	503,192	497,640
Total current liabilities	1,290,229	1,105,798
Deferred income taxes	45,720	46,990
Other long-term liabilities	43,526	39,183
Convertible debt (See Note 8)	866,569	0
Total liabilities	2,246,044	1,191,971
Redeemable noncontrolling interests (see Note 11)	183,316	127,045
Convertible debt (see Note 8)	71,808	77,360
Stockholders' equity:
Common stock, $0.008 par value, authorized 1,000,000,000 shares, 57,972,063 and 57,578,431 shares issued, respectively	449	446
Treasury stock, 8,180,276 and 7,779,645 shares, respectively	(1,057,811)	(803,586)
Additional paid-in capital	2,536,639	2,431,279
Accumulated earnings	1,163,494	1,033,738
Accumulated other comprehensive loss	(51,112)	(87,582)
Total stockholders' equity	2,591,659	2,574,295
Total liabilities and stockholders' equity	$ 5,092,827	$ 3,970,671