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INVENTORIES (Tables)
9 Months Ended
Sep. 30, 2017
Inventory Disclosure [Abstract]  
Schedule of Inventories

Inventories consist of the following:

 

   September 30, 2017   December 31, 2016 
Inventory at FIFO          
Finished products  $33,931   $24,100 
Materials and work in process   65,988    75,317 
Gross inventories   99,919    99,417 
Less:  LIFO reserve   (44,716)   (42,542)
Less:  excess and obsolescence reserve   (3,034)   (2,340)
Net inventories  $52,169   $54,535