UNAUDITED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 1,762,214	$ 1,536,349
Restricted cash	7,733	6,641
Short-term investments	4,182,860	3,646,845
Accounts receivable, net of allowance for doubtful accounts of $11,555 and $10,322, respectively	649,250	367,512
Prepaid expenses and other current assets	249,851	84,290
Deferred income taxes	74,242	40,738
Total current assets	6,926,150	5,682,375
Property and equipment, net	109,141	89,269
Intangible assets, net	1,052,087	208,113
Goodwill	1,738,346	522,672
Deferred income taxes	4,345	31,485
Other assets	37,302	35,828
Total assets	9,867,371	6,569,742
Current liabilities:
Accounts payable	316,251	184,648
Accrued expenses and other current liabilities	387,336	387,911
Deferred merchant bookings	535,644	368,823
Convertible debt (see Note 8)	532,206	520,344
Total current liabilities	1,771,437	1,461,726
Deferred income taxes	387,296	45,159
Other long-term liabilities	88,088	68,944
Convertible debt (See Note 8)	1,720,097	881,996
Total liabilities	3,966,918	2,457,825
Redeemable noncontrolling interests (see Note 11)	0	160,287
Convertible debt (see Note 8)	42,793	54,655
Stockholders' equity:
Common stock, $0.008 par value, authorized 1,000,000,000 shares, 60,222,000 and 58,055,586 shares issued, respectively	467	450
Treasury stock, 8,729,241 and 8,184,787 shares, respectively	(1,483,892)	(1,060,607)
Additional paid-in capital	4,408,981	2,612,197
Accumulated earnings	3,007,686	2,368,611
Accumulated other comprehensive loss	(75,582)	(23,676)
Total stockholders' equity	5,857,660	3,896,975
Total liabilities and stockholders' equity	$ 9,867,371	$ 6,569,742