UNAUDITED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 2,693,718	$ 1,477,265
Restricted cash	823	806
Short-term investments	1,677,242	1,171,246
Accounts receivable, net of allowance for doubtful accounts of $17,197 and $15,014, respectively	982,993	645,169
Prepaid expenses and other current assets	559,691	258,751
Total current assets	5,914,467	3,553,237
Property and equipment, net	320,450	274,786
Intangible assets, net	2,082,120	2,167,533
Goodwill	3,360,585	3,375,000
Long-term investments	7,954,414	7,931,363
Other assets	55,134	118,656
Total assets	19,687,170	17,420,575
Current liabilities:
Accounts payable	431,870	322,842
Accrued expenses and other current liabilities	1,019,513	681,587
Deferred merchant bookings	758,268	434,881
Total current liabilities	2,209,651	1,439,310
Deferred income taxes	803,935	892,576
Other long-term liabilities	143,674	134,777
Long-term debt	7,255,205	6,158,443
Total liabilities	10,412,465	8,625,106
Stockholders' equity:
Common stock, $0.008 par value; authorized 1,000,000,000 shares, 62,343,686 and 62,039,516 shares issued, respectively	484	482
Treasury stock, 12,865,743 and 12,427,945 shares, respectively	(6,385,308)	(5,826,640)
Additional paid-in capital	5,377,160	5,184,910
Retained earnings	10,146,927	9,191,865
Accumulated other comprehensive income	135,442	244,852
Total stockholders’ equity	9,274,705	8,795,469
Total liabilities and stockholders’ equity	$ 19,687,170	$ 17,420,575