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Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross $ 1,412,594 $ 1,381,512  
Accumulated depreciation and amortization (946,132) (919,457)  
Property, plant and equipment, net 466,462 462,055 $ 454,302
Expenditures for maintenance and repairs 19,800 19,400 19,100
Depreciation expense 62,085 68,800 61,517
Software amortization 2,400 3,200 3,600
Capital expenditures and purchased software 67,955 82,886 87,637
Unamortized software cost 5,300 6,900 $ 7,600
Finance Lease, Right-of-Use Asset 15,689    
Salt Lake City, Utah [Member]      
Property, Plant and Equipment [Line Items]      
Non-cash increase of lease modification $ 12,700    
Lease expiration date Dec. 31, 2029    
Land and Land Improvements [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross $ 14,168 14,287  
Estimated useful life 25 years    
Buildings [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross $ 227,875 245,805  
Buildings [Member] | Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Estimated useful life 15 years    
Buildings [Member] | Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Estimated useful life 40 years    
Right of use assets [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross $ 16,686    
Right of use assets [Member] | Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Estimated useful life 10 years    
Right of use assets [Member] | Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Estimated useful life 15 years    
Machinery and Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross $ 1,020,348 989,925  
Machinery and Equipment [Member] | Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Estimated useful life 5 years    
Machinery and Equipment [Member] | Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Estimated useful life 15 years    
Furniture and Fixtures [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross $ 8,126 8,091  
Estimated useful life 5 years    
Computer and Other Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross $ 18,808 16,473  
Computer and Other Equipment [Member] | Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Estimated useful life 3 years    
Computer and Other Equipment [Member] | Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Estimated useful life 10 years    
Software [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross $ 60,995 60,182  
Software [Member] | Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Estimated useful life 5 years    
Software [Member] | Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Estimated useful life 8 years    
Construction in Progress [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross $ 45,588 $ 46,749  
After acquired CirComp GmbH [Member]      
Property, Plant and Equipment [Line Items]      
Increase in Property, plant and equipment $ 10,600