Inventories (Tables)

9 Months Ended

Sep. 30, 2018

Inventory Disclosure [Abstract]

Inventories

Inventories are valued at the lower of cost or market. Inventories at September 30, 2018 and December 31, 2017 consisted of the following:

	September 30, 2018			December 31, 2017
Inventories carried at LIFO:
Finished goods	$	48,471		$	43,439
Raw materials, production parts and work-in-process	28,994			23,694
LIFO reserve	(30,668		)	(28,429		)
Total LIFO inventories	46,797			38,704
Inventories carried at FIFO:
Finished goods	53,138			54,161
Raw materials, production parts and work-in-process	39,858			34,829
Total FIFO inventories	92,996			88,990
Total inventories	$	139,793		$	127,694