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Inventories, Net
12 Months Ended
Dec. 31, 2019
Inventory Disclosure [Abstract]  
Inventories, Net Inventories, Net

The components of inventories, net of allowances, are as follows (in thousands):
 
December 31,
 
2019
 
2018
Finished goods
$
85,700

 
$
76,981

Work in process
10,614

 
13,870

Raw materials and supplies
73,733

 
82,794

Inventories, net
$
170,047

 
$
173,645



The Company maintains an allowance for excess and obsolete inventory, as well as inventory where its cost is in excess of its net realizable value.

The activity in the allowance for excess, obsolete, and net realizable value inventory account for the two years ended December 31, 2019 and 2018, was as follows (in thousands):
 
Years Ended December 31,
 
2019
 
2018
Balance at beginning of year
$
46,505

 
$
34,402

Provision
28,593

 
27,341

Charges processed
(26,509
)
 
(15,238
)
Balance at end of year
$
48,589

 
$
46,505