Inventories (Tables)

12 Months Ended

Dec. 31, 2019

Inventory Disclosure [Abstract]

Schedule of Inventories

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

	2019		2018
Raw material	$	45,700	$	57,845
Work-in-process	5,988		6,930
Finished goods	26,788		34,138
Total inventories	$	78,476	$	98,913

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):

	2019			2018			2017
Beginning balance	$	4,172		$	3,695		$	3,801
Excess, obsolete and slow moving inventory expense	659			729			1,276
Scrapped inventory and other adjustments	(639		)	(252		)	(1,382		)
Ending balance	$	4,192		$	4,172		$	3,695