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Inventories
3 Months Ended
Mar. 31, 2014
Inventory Disclosure [Abstract]  
Inventories
Inventories
Inventories consisted of the following:
 
March 31,
2014
 
December 31,
2013
Raw materials and work in process
$
34,084

 
$
33,920

Supplies and service parts
44,284

 
48,165

Finished products
38,652

 
38,515

Inventory at FIFO cost
117,020

 
120,600

Excess of FIFO cost over LIFO cost
(16,064
)
 
(17,020
)
Total inventory, net
$
100,956

 
$
103,580