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Goodwill (Tables)
 9 Months Ended
Sep. 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 September 30, 2017 (in thousands): 
 
North America
 
International
 
Total
Net goodwill as of December 31, 2016
$
170,757

 
$
31,943

 
$
202,700

Foreign exchange impact
52

 
3,953

 
4,004

Net goodwill as of September 30, 2017
$
170,807

 
$
35,897

 
$
206,704