Quarterly report pursuant to Section 13 or 15(d)

Inventories (Details)

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Inventories (Details) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Inventories [Abstract]    
Finished goods $ 37,443 $ 43,117
Work-in-process 2,189 1,730
Raw materials and supplies 7,196 6,649
Inventories $ 46,828 $ 51,496