CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 2,081,075	$ 1,477,265
Short-term investments	2,218,880	1,171,246
Accounts receivable, net of allowance for doubtful accounts of $25,565 and $15,014, respectively	860,115	645,169
Prepaid expenses and other current assets	241,449	259,557
Total current assets	5,401,519	3,553,237
Property and equipment, net	347,017	274,786
Intangible assets, net	1,993,885	2,167,533
Goodwill	2,396,906	3,375,000
Long-term investments	9,591,067	7,931,363
Other assets	108,579	118,656
Total assets	19,838,973	17,420,575
Current liabilities:
Accounts payable	419,108	322,842
Accrued expenses and other current liabilities	857,467	681,587
Deferred merchant bookings	614,361	434,881
Convertible debt	967,734	0
Total current liabilities	2,858,670	1,439,310
Deferred income taxes	822,334	892,576
Other long-term liabilities	138,767	134,777
Long-term debt	6,170,522	6,158,443
Total liabilities	9,990,293	8,625,106
Commitments and Contingencies (See Note 14)
Convertible debt	28,538	0
Stockholders' equity:
Common stock, $0.008 par value, authorized 1,000,000,000 shares, 62,379,247 and 62,039,516 shares issued, respectively	485	482
Treasury stock, 13,190,929 and 12,427,945 shares, respectively	(6,855,164)	(5,826,640)
Additional paid-in capital	5,482,653	5,184,910
Retained earnings	11,326,852	9,191,865
Accumulated other comprehensive income (loss)	(134,684)	244,852
Total stockholders' equity	9,820,142	8,795,469
Total liabilities and stockholders' equity	$ 19,838,973	$ 17,420,575