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Property, Plant and Equipment (Tables)
 12 Months Ended
Dec. 31, 2018
Property Plant And Equipment [Abstract]  
Schedule of Property, Plant and Equipment

Property, plant and equipment consists of the following:

 

December 31,

 

2018

 

 

2017

 

(dollars in thousands)

 

 

 

 

 

 

 

 

 

 

Land and land improvements

 

$

 

7,543

 

 

$

 

7,377

 

Buildings

 

 

 

50,607

 

 

 

 

50,058

 

Machinery and equipment

 

 

 

269,034

 

 

 

 

252,010

 

Construction in progress

 

 

 

7,184

 

 

 

 

5,239

 

Gross property, plant and equipment

 

 

 

334,368

 

 

 

 

314,684

 

Accumulated depreciation

 

 

 

(156,524

)

 

 

 

(140,240

)

Property, plant and equipment, net

 

$

 

177,844

 

 

$

 

174,444