Quarterly report pursuant to Section 13 or 15(d)

Inventories (Details)

v3.19.1
Inventories (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Inventories [Abstract]    
Finished goods $ 47,278 $ 51,626
Work-in-process 6,887 6,221
Raw materials and supplies 7,926 7,086
Inventories $ 62,091 $ 64,933