Inventories

12 Months Ended

Dec. 31, 2020

Inventory Disclosure [Abstract]

Inventories

INVENTORIES

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

	2020		2019
Raw material	$	66,018	$	42,030
Work-in-process	5,382		5,023
Finished goods	31,205		18,460
Gross inventory	$	102,605	$	65,513
Less reserves	(4,298)		(3,556)
Total inventories	$	98,307	$	61,957

The Company's gross inventory balances are reduced by reserves for excess, obsolete and slow moving inventory and estimates for determining net realizable value of the inventory that are reported on a net basis on the Company's consolidated balance sheet.

The Company's total inventory balance as of December 31, 2020 increased from December 31, 2019 largely due to acquired inventory of approximately $30 million during 2020. Refer to Note 6 "Acquisitions" for additional information concerning the Company's acquisitions.

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

	2020		2019		2018
Beginning balance	$	3,463	$	2,971	$	2,852
Excess, obsolete and slow moving inventory expense	355		1,134		363
Scrapped inventory and other adjustments	343		(642)		(244)
Ending balance	$	4,161	$	3,463	$	2,971