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Goodwill and Intagible Assets (Details 2) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Goodwill [Line Items]          
Goodwill $ 32,802   $ 32,802   $ 31,343
Intangible Assets, Gross (Excluding Goodwill) 16,657   16,657   $ 17,838
Amortization expense $ (1,102) $ (1,250) (2,170) $ (2,533)  
Finite-lived Intangible Assets Acquired     100    
Finite-Lived Intangible Assets, Translation Adjustments     $ 889