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Inventories
9 Months Ended
Sep. 30, 2019
Inventory Disclosure [Abstract]  
Inventories Inventories
Inventories are stated at the lower of cost or net realizable value. Cost is determined on the last-in, first-out (LIFO) basis for most U.S. inventories and the first-in, first-out (FIFO) basis for most non-U.S. inventories. Inventories at September 30, 2019 and December 31, 2018 consisted of the following:
 
September 30,
2019
 
December 31,
2018
Raw materials
$
18,683

 
$
8,229

Supplies and service parts
24,283

 
21,841

Finished products
37,856

 
36,692

Inventory at FIFO cost
80,822

 
66,762

Excess of FIFO cost over LIFO cost
(4,483
)
 
(4,483
)
Total inventory, net
$
76,339

 
$
62,279