Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets and Goodwill (Intangible Assets Rollforward) (Details)

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Intangible Assets and Goodwill (Intangible Assets Rollforward) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Finite-lived Intangible Assets [Roll Forward]    
Balance, beginning of period $ 8,110  
Amortization expense (516) $ (548)
Currency translation (29)  
Balance, end of period $ 7,623