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Inventories (Tables)
 6 Months Ended
Jun. 30, 2017
Inventory Disclosure [Abstract]  
Schedule of Inventory
Inventories at June 30, 2017 and December 31, 2016 are summarized in the following table:
 
 
June 30,
2017
 
December 31,
2016
Finished goods
 
$
45,144

 
$
46,673

Work-in-process
 
23,592

 
21,716

Raw materials
 
19,211

 
18,032

Total inventories at current costs
 
87,947

 
86,421

Less: LIFO reserve
 
(3,359
)
 
(3,178
)
 
 
$
84,588

 
$
83,243