Inventories (Tables)

3 Months Ended

Mar. 31, 2019

Inventory Disclosure [Abstract]

Inventory Components

Inventories at March 31, 2019 and December 31, 2018 consisted of the following:

	March 31, 2019			December 31, 2018
Raw materials	$	13,258		$	8,231
Supplies and service parts	23,627			21,841
Finished products	36,474			36,690
Inventory at FIFO cost	73,359			66,762
Excess of FIFO cost over LIFO cost	(4,483		)	(4,483		)
Total inventory, net	$	68,876		$	62,279