CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 1,536,349	$ 632,836
Restricted cash	6,641	3,771
Short-term investments	3,646,845	2,024,827
Accounts receivable, net of allowance for doubtful accounts of $10,322 and $6,103, respectively	367,512	264,453
Prepaid expenses and other current assets	84,290	104,202
Deferred income taxes	40,738	36,755
Total current assets	5,682,375	3,066,844
Property and equipment, net	89,269	64,322
Intangible assets, net	208,113	200,151
Goodwill	522,672	504,784
Deferred income taxes	31,485	111,080
Other assets	35,828	23,490
Total assets	6,569,742	3,970,671
Current liabilities:
Accounts payable	184,648	146,867
Accrued expenses and other current liabilities	387,911	222,134
Deferred merchant bookings	368,823	239,157
Convertible debt (see Note 11)	520,344	497,640
Total current liabilities	1,461,726	1,105,798
Deferred income taxes	45,159	46,990
Other long-term liabilities	68,944	39,183
Convertible debt (See Note 11)	881,996	0
Total liabilities	2,457,825	1,191,971
Commitments and Contingencies (see Note 16)
Redeemable noncontrolling interests (see Note 13)	160,287	127,045
Convertible debt (see Note 11)	54,655	77,360
Stockholders' equity:
Common stock, $0.008 par value, authorized 1,000,000,000 shares, 58,055,586 and 57,578,431 shares issued, respectively	450	446
Treasury stock, 8,184,787 and 7,779,645 shares, respectively	(1,060,607)	(803,586)
Additional paid-in capital	2,612,197	2,431,279
Accumulated earnings	2,368,611	1,033,738
Accumulated other comprehensive loss	(23,676)	(87,582)
Total stockholders' equity	3,896,975	2,574,295
Total liabilities and stockholders' equity	$ 6,569,742	$ 3,970,671