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Inventories
 12 Months Ended
Dec. 31, 2016
Inventory Disclosure [Abstract]  
Inventories
3.Inventories

 

Inventories consist of the following:

 

December 31,  2016   2015 
         
Finished goods  $24,099   $16,637 
Materials and products in process   72,978    62,523 
    97,077    79,160 
Adjustment of inventories to a LIFO basis   (42,542)   (42,061)
   $54,535   $37,099 

 

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.