Inventories (Tables)

3 Months Ended

Mar. 31, 2018

Inventory Disclosure [Abstract]

Schedule of Inventory

The components of inventories consisted of:

	March 31, 2018		December 31, 2017
Finished goods	$	75,503	$	79,649
Work-in-process	107,500		97,276
Raw material and supplies	67,214		65,037
	$	250,217	$	241,962