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Summary of Significant Accounting Policies (Property Plant and Equipment Net) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment $ 307,476us-gaap_PropertyPlantAndEquipmentGross $ 308,727us-gaap_PropertyPlantAndEquipmentGross
Less: accumulated depreciation (222,165)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment (222,404)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Property, Plant and Equipment, Net, Total 85,311us-gaap_PropertyPlantAndEquipmentNet 86,323us-gaap_PropertyPlantAndEquipmentNet
Land and Land Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment 4,036us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandImprovementsMember
4,236us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandImprovementsMember
Building and Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment 34,517us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingAndBuildingImprovementsMember
35,804us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingAndBuildingImprovementsMember
Machinery and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment 154,204us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_MachineryAndEquipmentMember
155,790us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_MachineryAndEquipmentMember
Office Furniture and Fixtures [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment 6,247us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_FurnitureAndFixturesMember
7,147us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_FurnitureAndFixturesMember
Tooling [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment 67,135us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ToolsDiesAndMoldsMember
70,050us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ToolsDiesAndMoldsMember
Information Technology [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment 22,132us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_TechnologyEquipmentMember
22,589us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_TechnologyEquipmentMember
Vehicles [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment 65us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_VehiclesMember
303us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_VehiclesMember
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment 2,207us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LeaseholdImprovementsMember
2,242us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LeaseholdImprovementsMember
Construction In Progress [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment $ 16,933us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ConstructionInProgressMember
$ 10,566us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ConstructionInProgressMember