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Property, Plant and Equipment, net
 6 Months Ended
Jun. 30, 2021
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment, net Property, Plant and Equipment, net
 
Property, plant and equipment consisted of the following:
 
Useful Life
(Years)
June 30, 2021December 31, 2020
Land $2,799 $2,724 
Buildings and improvements
30-40
25,363 25,731 
Office furniture and equipment
5-8
20,626 19,902 
Machinery and equipment
5-7
243,658 234,331 
  292,446 282,688 
Accumulated depreciation and amortization (200,548)(190,007)
Property, plant and equipment, net $91,898 $92,681 
 
Depreciation expense for each of the three months ended June 30, 2021 and 2020 was approximately $6.2 million and $6.0 million, respectively.

Depreciation expense for each of the six months ended June 30, 2021 and June 30, 2020 was $12.3 million and 12.1 million, respectively.