Inventories

3 Months Ended

Mar. 31, 2017

Inventory Disclosure [Abstract]

Inventories

3. Inventories

At March 31, 2017, and December 31, 2016, approximately 45% of the inventories were valued on the LIFO method with the remaining inventories valued on the FIFO method. Inventories were comprised of the following:

	March 31, 2017		December 31, 2016
Raw materials	$	21,600	$	23,964
Work-in-process		35,699		29,198
Finished goods		21,440		20,046
Supplies		13,534		10,371
	$	92,273	$	83,579