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Debt (Narrative) (Details)
SEK in Thousands, $ in Thousands
6 Months Ended 11 Months Ended
Jun. 30, 2017
SEK
Jun. 30, 2017
USD ($)
Jun. 30, 2017
USD ($)
Jan. 30, 2017
USD ($)
Dec. 31, 2016
SEK
Dec. 31, 2016
USD ($)
Aug. 12, 2016
USD ($)
Sep. 12, 2014
USD ($)
Oct. 04, 2010
Nov. 02, 2007
USD ($)
Debt Instrument [Line Items]                    
Borrowings outstanding     $ 132,000     $ 67,000        
Senior Notes [Member]                    
Debt Instrument [Line Items]                    
Debt interest rate                 9.50%  
Revolving Credit Facility [Member]                    
Debt Instrument [Line Items]                    
Capitalized deferred financing costs             $ 339      
Line of credit facility, maximum borrowing capacity               $ 300,000   $ 100,000
Increase in maximum borrowing capacity of credit facility               $ 80,000    
Borrowings outstanding     $ 132,000     67,000        
Line of credit expiration date Sep. 12, 2019                  
Maximum leverage ratio 300.00%   300.00%              
Minimum interest coverage ratio 350.00%   350.00%              
Revolving Credit Facility [Member] | Maximum [Member]                    
Debt Instrument [Line Items]                    
Credit facility, commitment fee percentage 0.35%                  
Revolving Credit Facility [Member] | Minimum [Member]                    
Debt Instrument [Line Items]                    
Credit facility, commitment fee percentage 0.20%                  
Asset-Based Credit Facility [Member]                    
Debt Instrument [Line Items]                    
Line of credit facility, maximum borrowing capacity                   $ 100,000
Letter of Credit [Member]                    
Debt Instrument [Line Items]                    
Outstanding letters of credit     $ 3,367     3,399        
Credit Facility [Member]                    
Debt Instrument [Line Items]                    
Credit Facility covenant compliance The Company was in compliance with all Credit Facility covenants at June 30, 2017 and December 31, 2016                  
Amendment Three [Member] | Revolving Credit Facility [Member]                    
Debt Instrument [Line Items]                    
Line of credit facilty amendement date   Aug. 12, 2016                
Length of the amended extension to the expiration date on debt   2 years                
Line of credit expiration date   Sep. 12, 2021                
Amendment Four [Member] | Revolving Credit Facility [Member]                    
Debt Instrument [Line Items]                    
Capitalized deferred financing costs       $ 61            
PST Debt [Member]                    
Debt Instrument [Line Items]                    
Notes covenant compliance PST was in compliance with all debt covenants at June 30, 2017 and December 31, 2016.                  
PST Eletronicaltda [Member]                    
Debt Instrument [Line Items]                    
Long-term debt, weighted average interest rate 12.80%   12.80%              
Short-term debt, weighted average interest rate 6.50%   6.50%              
PST Eletronicaltda [Member] | Term Loan [Member]                    
Debt Instrument [Line Items]                    
July 2017 through June 2018     $ 6,474              
July 2018 to December 2018     2,174              
2019     2,567              
2020     602              
2021     552              
Borrowing Sub-Limit for the Company's Foreign Subsidiaries [Member] | Amendment Three [Member] | Revolving Credit Facility [Member]                    
Debt Instrument [Line Items]                    
Sub-limit for foreign subsidiary borrowings     80,000              
Increase in sub-limit for foreign subsidiary borrowings     30,000              
Permitted Loans and Investments in Foreign Subsidiaries [Member] | Amendment Three [Member] | Revolving Credit Facility [Member]                    
Debt Instrument [Line Items]                    
Increase in permitted loans and investments in foregin subsidiaries.   $ 5,000                
Amount of permitted loans and investments in foregin subsidiaries     30,000              
Electronics [Member] | Line of Credit [Member]                    
Debt Instrument [Line Items]                    
Line of credit facility, maximum borrowing capacity SEK 20,000   2,373   SEK 20,000 2,196        
Borrowings outstanding     $ 0     $ 0