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Commitments and Contingencies (Narrative) (Details)
In Thousands, unless otherwise specified
3 Months Ended 18 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2014
USD ($)
Jun. 30, 2014
USD ($)
Dec. 31, 2013
USD ($)
Jun. 30, 2014
Electronics [Member]
USD ($)
Jun. 30, 2014
Accrued Expenses and Other Current Liabilities [Member]
USD ($)
Dec. 31, 2013
Accrued Expenses and Other Current Liabilities [Member]
USD ($)
Jun. 30, 2014
Letter of Credit [Member]
USD ($)
Jun. 30, 2014
PST Eletronicaltda [Member]
USD ($)
Jun. 30, 2014
PST Eletronicaltda [Member]
BRL
Dec. 31, 2013
PST Eletronicaltda [Member]
USD ($)
Jun. 30, 2014
PST Eletronicaltda [Member]
Value Added Tax [Member]
USD ($)
Jun. 30, 2014
PST Eletronicaltda [Member]
Value Added Tax [Member]
BRL
Jun. 30, 2014
PST Eletronicaltda [Member]
Interest On Tax [Member]
USD ($)
Jun. 30, 2014
PST Eletronicaltda [Member]
Interest On Tax [Member]
BRL
Jun. 30, 2014
PST Eletronicaltda [Member]
Penalties On Tax [Member]
USD ($)
Jun. 30, 2014
PST Eletronicaltda [Member]
Penalties On Tax [Member]
BRL
Jun. 30, 2014
Minda Stoneridge Instruments Ltd [Member]
Dec. 31, 2013
Minda Stoneridge Instruments Ltd [Member]
Short-term Debt [Line Items]                                    
Environmental remediation accrued undiscounted liability $ 944 $ 944 $ 944   $ 715 $ 683                        
Line of credit             2,000                      
Loss contingency, estimate of possible loss       19,000       14,787   11,469                
Equity method investment, ownership percentage                                 49.00% 49.00%
Loss contingencies aggregate tax assessment not accrued               42,000 92,500   6,000 13,200 5,200 11,400 30,800 67,900    
Percentage of state value added tax 25.00%                                  
Percentage ownership in consolidated subsidiary   74.00%           74.00% 74.00% 74.00%                
Product warranty and recall accrual $ 1,133 $ 1,133 $ 1,019