Inventories (Tables)

12 Months Ended

Dec. 31, 2017

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories at December 31 consisted of the following (in thousands):

	2017		2016
Raw material	$	42,661	$	41,758
Work-in-process	10,598		12,268
Finished goods	33,113		35,586
Total inventories	$	86,372	$	89,612

Summary of Activity within the Reserve for Excess, Obsolete, and Slow Moving Inventory

The following table summarizes activity recorded within the reserve for excess, obsolete and slow moving inventory for the years ended December 31 (in thousands):

	2017			2016			2015
Beginning balance	$	3,801		$	7,428		$	5,575
Excess, obsolete and slow moving inventory expense	1,276			(239		)	1,539
Scrapped inventory and other adjustments	(1,382		)	(3,388		)	314
Ending balance	$	3,695		$	3,801		$	7,428