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Business Realignment (Schedule of Business Realignment Charges Classified by Statement of Operations) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Restructuring Cost and Reserve [Line Items]    
Total business realignment charges $ 171 $ 1,902
Cost of Goods Sold [Member]    
Restructuring Cost and Reserve [Line Items]    
Total business realignment charges 90 179
Selling, General and Administrative Expenses [Member]    
Restructuring Cost and Reserve [Line Items]    
Total business realignment charges $ 81 664
Design and Development Expense [Member]    
Restructuring Cost and Reserve [Line Items]    
Total business realignment charges   $ 1,059