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Inventories
12 Months Ended
Dec. 31, 2015
Inventories [Abstract]  
Inventories
  3. Inventories

 

Inventories consist of the following:

  

December 31,   2015     2014  
             
Finished goods   $ 16,637     $ 20,083  
Materials and products in process     62,523       65,184  
      79,160       85,267  
Adjustment of inventories to a LIFO basis     (42,061 )     (40,578 )
    $ 37,099     $ 44,689  

In 2015, inventory quantities were reduced. This reduction resulted in a liquidation of LIFO inventory quantities carried at lower costs prevailing in prior years as compared with the current cost of purchases, the effect of which decreased costs of products sold by approximately $0.1 million in 2015.