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Property, Plant and Equipment (Tables)
12 Months Ended
Dec. 31, 2020
Property Plant And Equipment [Abstract]  
Summary of Property, Plant and Equipment

Property, plant and equipment at December 31, 2020 and 2019 consist of the following:

 

 

 

2020

 

 

2019

 

 

Estimated

useful lives

Land

 

$

2,756

 

 

$

2,706

 

 

 

Buildings and improvements

 

 

19,786

 

 

 

18,640

 

 

10 to 30 years

Machinery and equipment

 

 

124,199

 

 

 

116,757

 

 

3 to 15 years

Office furniture, fixtures and equipment

 

 

7,403

 

 

 

6,228

 

 

3 to 10 years

Automotive equipment

 

 

1,747

 

 

 

1,762

 

 

3 to 6 years

Construction in progress

 

 

10,392

 

 

 

5,263

 

 

 

Total gross value

 

 

166,283

 

 

 

151,356

 

 

 

Less accumulated depreciation

 

 

(100,901

)

 

 

(94,835

)

 

 

Total net value

 

$

65,382

 

 

$

56,521