Annual report pursuant to Section 13 and 15(d)

Property, Plant, and Equipment, Net (Schedule of Property, Plant, and Equipment, Net) (Details)

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Property, Plant, and Equipment, Net (Schedule of Property, Plant, and Equipment, Net) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]      
Impairment of Long-Lived Assets Held-for-use $ 59,800,000 $ 58,200,000 $ 59,900,000
Property, plant, and equipment, gross 869,743,000 780,950,000  
Less accumulated depreciation (523,092,000) (489,354,000)  
Property, plant, and equipment, net 346,651,000 291,596,000  
Land and Land Improvements [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant, and equipment, gross 26,951,000 20,961,000  
Building and Building Improvements [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant, and equipment, gross 204,077,000 170,928,000  
Machinery and Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant, and equipment, gross 383,881,000 327,678,000  
Furniture and Fixtures [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant, and equipment, gross 96,303,000 88,305,000  
Leasehold Improvements [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant, and equipment, gross 147,760,000 131,756,000  
Construction in Progress [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant, and equipment, gross $ 10,771,000 $ 41,322,000