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Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Property Plant And Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 517,711 $ 498,113
Less: accumulated depreciation (229,167) (211,730)
Total property, plant and equipment, net 288,544 286,383
Land    
Property Plant And Equipment [Line Items]    
Property, Plant and Equipment, Gross 7,333 7,875
Buildings and Improvements [Member]    
Property Plant And Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 126,576 123,342
Buildings and Improvements [Member] | Minimum [Member]    
Property Plant And Equipment [Line Items]    
Property, plant and equipment, useful life 10 years  
Buildings and Improvements [Member] | Maximum [Member]    
Property Plant And Equipment [Line Items]    
Property, plant and equipment, useful life 40 years  
Machinery and Equipment    
Property Plant And Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 377,782 360,570
Machinery and Equipment | Minimum [Member]    
Property Plant And Equipment [Line Items]    
Property, plant and equipment, useful life 2 years  
Machinery and Equipment | Maximum [Member]    
Property Plant And Equipment [Line Items]    
Property, plant and equipment, useful life 25 years  
Construction in Progress    
Property Plant And Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 6,020 $ 6,326