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Inventories
 9 Months Ended 12 Months Ended
Sep. 30, 2017
Dec. 31, 2016
Inventory Disclosure [Abstract]    
Inventories
6.
Inventories
Inventories are valued at the lower of cost or market. Inventories at September 30, 2017 and December 31, 2016 consisted of the following:
 
September 30,
2017
 
December 31,
2016
Inventories carried at LIFO:
 
 
 
Finished goods
$
47,734

 
$
39,142

Raw materials, production parts and work-in-process
24,275

 
23,980

LIFO reserve
(28,190
)
 
(28,190
)
Total LIFO inventories
43,819

 
34,932

Inventories carried at FIFO:
 

 
 

Finished goods
56,477

 
31,044

Raw materials, production parts and work-in-process
41,223

 
12,646

Total FIFO inventories
97,700

 
43,690

Total inventories
$
141,519

 
$
78,622


The LIFO reserve approximates the difference between LIFO carrying cost and FIFO.
5.
Inventories
Inventories as of December 31, consisted of the following:
 
2016
 
2015
Inventories carried at LIFO:
 
 
 
Finished goods
$
39,142

 
$
41,225

Raw materials, production parts and work-in-process
23,980

 
22,158

LIFO reserve
(28,190
)
 
(27,645
)
Total LIFO inventories
$
34,932

 
$
35,738

 
 
 
 
Inventories carried at FIFO:
 
 
 
Finished goods
$
31,044

 
$
32,421

Raw materials, production parts and work-in-process
12,646

 
13,812

Less: Inventories held for sale
—

 
(4,679
)
Total FIFO inventories
$
43,690

 
$
41,554

Total inventories
$
78,622

 
$
77,292


The LIFO reserve approximates the difference between LIFO carrying cost and FIFO.