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Summary of Significant Accounting Policies (Property Plant and Equipment Net) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment $ 387,103 $ 382,642
Less: accumulated depreciation (276,231) (263,495)
Property, plant and equipment, net 110,872 119,147
Land and Land Improvements [Member]
    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment 4,861 5,117
Building and Improvements [Member]
    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment 43,630 45,940
Machinery and Equipment [Member]
    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment 208,243 196,003
Office Furniture and Fixtures [Member]
    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment 8,351 8,856
Tooling [Member]
    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment 70,050 71,045
Information Technology [Member]
    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment 33,759 33,009
Vehicles [Member]
    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment 426 1,456
Leasehold Improvements [Member]
    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment 3,447 3,560
Construction In Progress [Member]
    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment $ 14,336 $ 17,656