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Property, Plant And Equipment (Components Of Property, Plant, And Equipment) (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment $ 878,575 $ 743,925
Accumulated depreciation (335,507) (283,719)
Total property, plant and equipment — net 543,068 460,206
Land    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment 41,937 26,623
Building    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment 332,150 267,256
Machinery and equipment    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment 384,259 344,905
Office furniture and fixtures    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment 65,775 55,885
Construction-in-progress    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment $ 54,454 $ 49,256