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Details of Certain Consolidated Balance Sheet Captions (Property, Plant and Equipment, net) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Line Items]    
Gross property, plant and equipment $ 1,650,221 $ 1,578,474
Less: accumulated depreciation (1,093,348) (1,014,910)
Property, plant and equipment, net 556,873 563,564
Land    
Property, Plant and Equipment [Line Items]    
Gross property, plant and equipment 65,894 64,778
Buildings and improvements    
Property, Plant and Equipment [Line Items]    
Gross property, plant and equipment 446,008 419,454
Machinery, equipment and tooling    
Property, Plant and Equipment [Line Items]    
Gross property, plant and equipment 699,256 666,376
Software, furniture and fixtures and other    
Property, Plant and Equipment [Line Items]    
Gross property, plant and equipment $ 439,063 $ 427,866