Quarterly report pursuant to Section 13 or 15(d)

Foreign Currency Translation (Details)

v3.7.0.1
Foreign Currency Translation (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Revenue from external customers        
Net sales $ 102,982 $ 105,257 $ 215,778 $ 198,580
Foreign operations        
Revenue from external customers        
Net sales $ 10,900 $ 11,400 $ 23,600 $ 20,900