INVENTORIES
3 Months Ended
Mar. 31, 2015
Inventory Disclosure [Abstract]  
INVENTORIES
INVENTORIES:
Inventories were valued at cost as determined by the last-in, first-out (“LIFO”) method for approximately 56% and 55% of the Company’s inventories at March 31, 2015 and December 31, 2014, respectively. The remaining inventories are valued at cost determined by a combination of the first-in, first-out (“FIFO”) and weighted-average cost methods. Inventory costs generally include materials, labor, and manufacturing overhead (including depreciation). As of March 31, 2015 and December 31, 2014, the current FIFO cost of inventories exceeded their LIFO carrying value by $25,893 and $30,481, respectively. When market conditions indicate an excess of carrying cost over market value, a lower-of-cost-or-market provision is recorded. Inventories consisted of the following:
 
 
March 31,
2015
 
December 31,
2014
Raw materials and supplies
 
$
136,958

 
$
172,214

Work-in-process and finished goods
 
364,654

 
332,573

LIFO reserve
 
(25,893
)
 
(30,481
)
Total inventories, net
 
$
475,719

 
$
474,306