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Inventories
12 Months Ended
Dec. 31, 2018
Inventory Disclosure [Abstract]  
Inventories
8.
Inventories
Inventories as of December 31 consisted of the following:
 
2018
 
2017
Inventories carried at LIFO:
 
 
 
Finished goods
$
48,607

 
$
43,439

Raw materials, production parts and work-in-process
28,581

 
23,694

Excess of FIFO over LIFO cost (a)
(31,199
)
 
(28,429
)
Total LIFO inventories
$
45,989

 
$
38,704

 
 
 
 
Inventories carried at FIFO:
 
 
 
Finished goods
$
53,520

 
$
54,161

Raw materials, production parts and work-in-process
35,624

 
34,829

Total FIFO inventories
$
89,144

 
$
88,990

Total inventories
$
135,133

 
$
127,694


(a) Inventories of $45,989 as of December 31, 2018, and $38,704 as of December 31, 2017, were valued at LIFO. The difference between replacement cost and the stated LIFO inventory value is not materially different from the reserve for the LIFO valuation method.