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, 2015
Dec. 31, 2014
Property, Plant and Equipment [Line Items]    
Property, plant, and equipment, gross $ 654,965 $ 637,175
Less accumulated depreciation (363,278) (345,612)
Property, plant, and equipment, net 291,687 291,563
Land and Land Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant, and equipment, gross 20,832 21,049
Building and Building Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant, and equipment, gross 165,182 160,165
Machinery and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant, and equipment, gross 286,055 281,132
Furniture and Fixtures [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant, and equipment, gross 75,682 72,292
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant, and equipment, gross 102,056 93,782
Construction in Progress [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant, and equipment, gross $ 5,158 $ 8,755