UNAUDITED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 1,288,150	$ 1,289,994
Restricted cash	15,616	10,476
Short-term investments	5,422,358	5,462,720
Accounts receivable, net of allowance for doubtful accounts of $14,237 and $14,116, respectively	627,160	535,962
Prepaid expenses and other current assets	428,123	107,102
Deferred income taxes	74,533	74,687
Total current assets	7,855,940	7,480,941
Property and equipment, net	149,373	135,053
Intangible assets, net	998,307	1,019,985
Goodwill	1,771,548	1,767,912
Deferred income taxes	5,093	7,055
Other assets	33,423	33,514
Total assets	10,813,684	10,444,460
Current liabilities:
Accounts payable	299,411	247,345
Accrued expenses and other current liabilities	561,915	545,342
Deferred merchant bookings	471,956	437,127
Convertible debt (see Note 8)	97,707	151,931
Total current liabilities	1,430,989	1,381,745
Deferred income taxes	334,631	326,425
Other long-term liabilities	81,177	75,981
Convertible debt (see Note 8)	1,753,160	1,742,047
Total liabilities	3,599,957	3,526,198
Convertible debt (see Note 8)	4,318	8,533
Stockholders' equity:
Common stock, $0.008 par value; authorized 1,000,000,000 shares, 61,614,457 and 61,265,160 shares issued, respectively	478	476
Treasury stock, 9,328,998 and 9,256,721 shares, respectively	(2,083,867)	(1,987,207)
Additional paid-in capital	4,650,077	4,592,979
Accumulated earnings	4,549,970	4,218,752
Accumulated other comprehensive income	92,751	84,729
Total stockholders' equity	7,209,409	6,909,729
Total liabilities and stockholders' equity	$ 10,813,684	$ 10,444,460