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Property and Equipment
6 Months Ended
Jun. 30, 2013
Property, Plant and Equipment [Abstract]  
Property and Equipment
Property and Equipment
The following table presents the detail of property and equipment, net, for the periods presented (in thousands): 
 
June 30,
2013
 
December 31,
2012
Computer equipment
$
297,902

 
$
199,022

Software
31,775

 
26,901

Capitalized website and internal-use software
59,282

 
40,971

Furniture and fixtures
21,762

 
17,087

Leasehold improvements
69,952

 
44,362

Total
480,673

 
328,343

Less accumulated depreciation
(187,958
)
 
(141,666
)
Property and equipment, net
$
292,715

 
$
186,677