Quarterly report pursuant to Section 13 or 15(d)

Inventories (Details)

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Inventories (Details) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Inventories [Abstract]    
Finished goods $ 44,272 $ 45,776
Work-in-process 1,926 1,177
Raw materials and supplies 8,082 9,836
Inventories $ 54,280 $ 56,789