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Goodwill and Intangible Assets, Net (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Changes in the carrying amount of goodwill    
Balance at the beginning of the period $ 124,479  
Foreign exchange 568  
Balance at the end of the period 135,113 $ 125,614
Changes in the carrying amount of intangible assets    
Balance at the beginning of the period 22,864  
Goodwill, Acquired During Period 10,066  
Finite-lived Intangible Assets Acquired 10,301  
Amortization (1,683) (1,500)
Foreign exchange 231  
Balance at the end of the period $ 31,713 $ 26,719