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 ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Property, Plant and Equipment [Line Items]    
Property, plant, and equipment, gross $ 688,326 $ 654,965
Less accumulated depreciation (408,676) (363,278)
Property, plant, and equipment, net 279,650 291,687
Land and Land Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant, and equipment, gross 20,862 20,832
Building and Building Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant, and equipment, gross 165,746 165,182
Machinery and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant, and equipment, gross 301,566 286,055
Furniture and Fixtures [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant, and equipment, gross 79,103 75,682
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant, and equipment, gross 107,574 102,056
Construction in Progress [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant, and equipment, gross $ 13,475 $ 5,158