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Goodwill and Intangible Assets - Amortization and Goodwill (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]      
Intangible Assets, Gross (Excluding Goodwill) $ 26,755 $ 33,641  
Amortization expense 5,526 3,859 $ 1,179
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]      
2014 5,174    
2015 5,028    
2016 4,564    
2017 3,412    
2018 2,500    
Thereafter 6,077    
Total amortization expense 26,755 33,641  
Goodwill [Roll Forward]      
Balance at January 1 40,454    
Foreign currency translation adjustment (3,707)    
Balance at December 31 36,747 $ 40,454  
Amortization expense (5,526)    
Finite-Lived Intangible Assets, Translation Adjustments $ (1,360)