Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Accounting Policies [Abstract]

Summary of Inventories

	December 31,
	2017		2016
Finished goods	$	47,613	$	43,511
Work in process	35,455		32,839
Raw materials and supplies	87,128		70,099
	$	170,196	$	146,449