Property, Plant and Equipment (Tables)

9 Months Ended

Sep. 30, 2018

Property, Plant and Equipment [Abstract]

Summary of Property, Plant and Equipment

Property, plant and equipment is comprised of the following:

	As of
	September 30,			December 31,
	2018			2017
Land	$	1,136		$	1,130
Buildings and improvements	68,883			64,201
Machinery and equipment	232,154			223,650
Less: Accumulated depreciation	(205,503		)	(200,734		)
Property, plant and equipment, net	$	96,670		$	88,247
Depreciation expense for the nine months ended September 30, 2018				$	11,227
Depreciation expense for the nine months ended September 30, 2017				$	10,201