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Commitments and Contingencies (Narrative) (Details)
BRL in Thousands, $ in Thousands, item in Millions
 6 Months Ended 24 Months Ended
Jun. 30, 2017
USD ($)
item
customer
Dec. 31, 2010
Jun. 30, 2017
BRL
Jun. 30, 2017
USD ($)
Dec. 31, 2016
BRL
Dec. 31, 2016
USD ($)
Short-term Debt [Line Items]            
Environmental remediation accrued undiscounted liability       $ 269   $ 446
Number of people the plaintiff states have damages | customer 120,000          
Number of vehicles the plaintiff states are effected | item 1          
Maximum loss per plaintiff $ 1          
Litigation liability       0    
Product warranty and recall accrual       3,303   2,617
Accrued Expenses and Other Current Liabilities [Member]            
Short-term Debt [Line Items]            
Environmental remediation accrued undiscounted liability       203   370
Letter of Credit [Member]            
Short-term Debt [Line Items]            
Line of credit       2,000    
PST Eletronicaltda [Member]            
Short-term Debt [Line Items]            
Loss contingencies aggregate tax assessment not accrued     BRL 92,500 28,000    
Percentage of state value added tax   25.00%        
PST Eletronicaltda [Member] | Civil, labor and other tax contingencies [Member]            
Short-term Debt [Line Items]            
Loss contingency, estimate of possible loss     45,600 13,800 BRL 31,800 $ 9,800
PST Eletronicaltda [Member] | Value Added Tax [Member]            
Short-term Debt [Line Items]            
Loss contingencies aggregate tax assessment not accrued     13,200 4,000    
PST Eletronicaltda [Member] | Interest On Tax [Member]            
Short-term Debt [Line Items]            
Loss contingencies aggregate tax assessment not accrued     11,400 3,500    
PST Eletronicaltda [Member] | Penalties On Tax [Member]            
Short-term Debt [Line Items]            
Loss contingencies aggregate tax assessment not accrued     BRL 67,900 $ 20,500