Quarterly report pursuant to Section 13 or 15(d)

Foreign Currency Translation (Details)

v3.8.0.1
Foreign Currency Translation (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Revenue from external customers        
Net sales $ 106,646 $ 99,586 $ 322,423 $ 298,167
Foreign operations        
Revenue from external customers        
Net sales $ 11,300 $ 10,700 $ 34,900 $ 31,600