Inventories, Net (Tables)

9 Months Ended

Sep. 30, 2017

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories are summarized as follows:

	September 30, 2017			December 31, 2016
Raw materials	$	42,881		$	34,261
Work-in-process	24,508			16,739
Finished goods	67,269			57,053
Supplies and other	134			120
LIFO reserve	(11,912		)	(10,936		)
Inventories, net	$	122,880		$	97,237