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Property, Plant & Equipment (Tables)
6 Months Ended
Jun. 30, 2019
Property, Plant and Equipment [Abstract]  
Schedule of Property, Plant and Equipment [Table]

Property, plant and equipment consisted of the following for the periods specified:
 
June 30, 2019
 
December 31, 2018
Property, plant and equipment
$
168,843,000

 
$
164,145,000

Accumulated depreciation
(87,589,000
)
 
(83,488,000
)
Property, plant and equipment — net
$
81,254,000

 
$
80,657,000