Annual report pursuant to Section 13 and 15(d)

Property, Plant, and Equipment, Net (Details)

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Property, Plant, and Equipment, Net (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Property, Plant and Equipment [Line Items]    
Property, plant, and equipment, gross $ 563,567 $ 526,796
Less accumulated depreciation (303,043) (275,886)
Property, plant, and equipment, net 260,524 250,910
Land and Land Improvements [Member]
    
Property, Plant and Equipment [Line Items]    
Property, plant, and equipment, gross 20,036 20,690
Building and Building Improvements [Member]
    
Property, Plant and Equipment [Line Items]    
Property, plant, and equipment, gross 166,365 155,672
Machinery and Equipment [Member]
    
Property, Plant and Equipment [Line Items]    
Property, plant, and equipment, gross 206,805 198,387
Furniture and Fixtures [Member]
    
Property, Plant and Equipment [Line Items]    
Property, plant, and equipment, gross 54,914 50,108
Leasehold Improvements [Member]
    
Property, Plant and Equipment [Line Items]    
Property, plant, and equipment, gross 72,426 65,476
Construction in Progress [Member]
    
Property, Plant and Equipment [Line Items]    
Property, plant, and equipment, gross $ 43,021 $ 36,463