Quarterly report pursuant to Section 13 or 15(d)

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

v3.10.0.1
Intangible Assets and Goodwill (Intangible Assets Rollforward) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Finite-lived Intangible Assets [Roll Forward]        
Balance, beginning of period     $ 6,295  
Amortization expense $ (520) $ (524) (1,047) $ (1,040)
Currency translation     46  
Balance, end of period $ 5,202   $ 5,202