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Goodwill and Intagible Assets (Details 2) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Goodwill [Line Items]          
Goodwill $ 33,674   $ 33,674   $ 31,343
Intangible Assets, Gross (Excluding Goodwill) 16,047   16,047   $ 17,838
Amortization expense $ (1,096) $ (1,145) (3,266) $ (3,678)  
Finite-lived Intangible Assets Acquired     105    
Finite-Lived Intangible Assets, Translation Adjustments     $ 1,370