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Property, Plant and Equipment (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Property, Plant and Equipment [Line Items]    
Property, plant and equipment $ 250,127 $ 195,713
Increase in depreciation expense related to change in estimated useful life 700  
Land and improvements [Member]
   
Property, Plant and Equipment [Line Items]    
Property, plant and equipment 1,819 1,308
Buildings and improvements [Member]
   
Property, Plant and Equipment [Line Items]    
Property, plant and equipment 39,034 29,539
Machinery and equipment [Member]
   
Property, Plant and Equipment [Line Items]    
Property, plant and equipment 172,987 133,635
Useful life 7 years  
Machinery and equipment [Member] | 2014 [Member]
   
Property, Plant and Equipment [Line Items]    
Increase in depreciation expense related to change in estimated useful life 7,000  
Machinery and equipment [Member] | 2015 [Member]
   
Property, Plant and Equipment [Line Items]    
Increase in depreciation expense related to change in estimated useful life 3,000  
Machinery and equipment [Member] | Minimum [Member]
   
Property, Plant and Equipment [Line Items]    
Useful life 7 years  
Machinery and equipment [Member] | Maximum [Member]
   
Property, Plant and Equipment [Line Items]    
Useful life 10 years  
Dies and tools [Member]
   
Property, Plant and Equipment [Line Items]    
Property, plant and equipment $ 36,287 $ 31,231
Useful life 3 years