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Property, Plant & Equipment (Tables)
3 Months Ended
Mar. 31, 2021
Property, Plant and Equipment [Abstract]  
Schedule of Property, Plant and Equipment
Property, plant and equipment, net consisted of the following for the periods specified (in thousands):
March 31, 2021December 31, 2020
Property, plant and equipment$176,942 $174,553 
Accumulated depreciation(102,942)(100,501)
Property, plant and equipment — net$74,000 $74,052