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Accounts Payable (Tables)
12 Months Ended
Dec. 31, 2017
Payables And Accruals [Abstract]  
Schedule of Accounts Payable

Accounts payable included the following (in thousands):

 

 

 

As of December 31,

 

 

 

2016

 

 

2017

 

Accounts payable–media and data

 

$

307,018

 

 

$

477,716

 

Accounts payable–other

 

 

14,145

 

 

 

12,661

 

Total

 

$

321,163

 

 

$

490,377