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Goodwill (Tables)
 6 Months Ended
Jun. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Business Combination, Segment Allocation
The following is a summary of the goodwill balance for each reportable segment as of June 30, 2017 (in thousands): 
 
North America
 
International
 
Total
Net goodwill as of December 31, 2016
$
170,757

 
$
31,943

 
$
202,700

Foreign exchange impact
22

 
2,677

 
2,699

Net goodwill as of June 30, 2017
$
170,779

 
$
34,620

 
$
205,399