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Property, Plant, and Equipment (Summary of Property, Plant, and Equipment) (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment $ 470,063 $ 458,296
Less accumulated depreciation and amortization (226,584) (220,030)
Total property, plant, and equipment, net 243,479 238,266
Building [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment 131,193 130,726
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment 31,535 31,535
Land    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment 7,469 7,451
Machinery and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment 216,742 208,068
Furniture, fixtures, and automobiles    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment 30,273 29,674
Construction in progress    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment $ 52,851 $ 50,842