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Summary of Significant Accounting Policies (Property Plant and Equipment Net) (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment $ 380,734 $ 402,841
Less: accumulated depreciation (272,833) (283,517)
Property, Plant and Equipment, Net, Total 107,901 119,324
Land and Land Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment 3,064 4,447
Buildings and Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment 28,842 39,784
Machinery and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment 249,365 253,563
Office Furniture and Fixtures [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment 8,701 9,993
Tooling [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment 41,391 40,967
Information Technology [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment 30,454 28,491
Vehicles [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment 741 654
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment 5,592 5,198
Construction In Progress [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment $ 12,584 $ 19,744