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Restructuring and Business Realignment (Schedule of Restructuring and Related Costs) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]      
Charge to expense $ 2,617 $ 1,029 $ 1,578
Cost of Sales [Member]      
Restructuring Cost and Reserve [Line Items]      
Charge to expense 437 172 847
Selling, General and Administrative Expenses [Member]      
Restructuring Cost and Reserve [Line Items]      
Charge to expense 1,080 528 559
Design and Development [Member]      
Restructuring Cost and Reserve [Line Items]      
Charge to expense 1,100 329 172
Electronics [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring Reserve, Beginning Balance 458 733 780
Charge to expense 59 183 494
Foreign currency translation effect (69) 3 (45)
Cash payments (175) (461) (496)
Restructuring Reserve, Ending Balance 273 458 733
Electronics [Member] | Selling, General and Administrative Expenses [Member]      
Restructuring Cost and Reserve [Line Items]      
Charge to expense 59 183 494
Severance costs 196 102  
Electronics [Member] | Design and Development [Member]      
Restructuring Cost and Reserve [Line Items]      
Severance costs 984 215  
PST Segment [Member] | Cost of Sales [Member]      
Restructuring Cost and Reserve [Line Items]      
Severance costs 437 172 847
PST Segment [Member] | Selling, General and Administrative Expenses [Member]      
Restructuring Cost and Reserve [Line Items]      
Severance costs 884 117 559
PST Segment [Member] | Design and Development [Member]      
Restructuring Cost and Reserve [Line Items]      
Severance costs 116 114 172
Corporate [Member] | Selling, General and Administrative Expenses [Member]      
Restructuring Cost and Reserve [Line Items]      
Charge to expense   309  
Employee Severance [Member]      
Restructuring Cost and Reserve [Line Items]      
Charge to expense 2,617 1,029 1,578
Employee Severance [Member] | Electronics [Member]      
Restructuring Cost and Reserve [Line Items]      
Charge to expense [1] 1,180 317  
Employee Severance [Member] | PST Segment [Member]      
Restructuring Cost and Reserve [Line Items]      
Charge to expense [2] $ 1,437 403 $ 1,578
Employee Severance [Member] | Corporate [Member]      
Restructuring Cost and Reserve [Line Items]      
Charge to expense [3]   $ 309  
[1] Severance costs for the year ended December 31, 2016 related to selling, general and administrative (“SG&A”) and design and development (“D&D”) were $196 and $984, respectively. Severance costs for the year ended December 31, 2015 related to SG&A and D&D were $102 and $215, respectively.
[2] Severance costs for the year ended December 31, 2016 related to cost of goods sold (“COGS”), SG&A and D&D were $437, $884 and $116, respectively. Severance costs for the year ended December 31, 2015 related to COGS, SG&A and D&D were $172, $117 and $114, respectively. Severance costs for year ended December 31, 2014 related to COGS, SG&A and D&D were $847, $559 and $172, respectively.
[3] Severance costs for the year then ended December 31, 2015 related to SG&A were $309.