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Commitments and Contingencies (Narrative) (Details)
In Thousands, unless otherwise specified
24 Months Ended 3 Months Ended
Dec. 31, 2010
Mar. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Mar. 31, 2015
Electronics [Member]
USD ($)
Mar. 31, 2015
Electronics [Member]
EUR (€)
Mar. 31, 2015
Accrued Expenses and Other Current Liabilities [Member]
USD ($)
Dec. 31, 2014
Accrued Expenses and Other Current Liabilities [Member]
USD ($)
Mar. 31, 2015
Letter of Credit [Member]
USD ($)
Mar. 31, 2015
PST Eletronicaltda [Member]
USD ($)
Mar. 31, 2015
PST Eletronicaltda [Member]
BRL
Dec. 31, 2014
PST Eletronicaltda [Member]
USD ($)
Dec. 31, 2014
PST Eletronicaltda [Member]
BRL
Mar. 31, 2015
PST Eletronicaltda [Member]
Value Added Tax [Member]
USD ($)
Mar. 31, 2015
PST Eletronicaltda [Member]
Value Added Tax [Member]
BRL
Mar. 31, 2015
PST Eletronicaltda [Member]
Interest On Tax [Member]
USD ($)
Mar. 31, 2015
PST Eletronicaltda [Member]
Interest On Tax [Member]
BRL
Mar. 31, 2015
PST Eletronicaltda [Member]
Penalties On Tax [Member]
USD ($)
Mar. 31, 2015
PST Eletronicaltda [Member]
Penalties On Tax [Member]
BRL
Mar. 31, 2015
Minda Stoneridge Instruments Ltd [Member]
Short-term Debt [Line Items]                                      
Environmental remediation accrued undiscounted liability   $ 865us-gaap_AccrualForEnvironmentalLossContingenciesGross $ 876us-gaap_AccrualForEnvironmentalLossContingenciesGross     $ 801us-gaap_AccrualForEnvironmentalLossContingenciesGross
/ us-gaap_BalanceSheetLocationAxis
= sri_AccruedExpensesAndOtherCurrentLiabilitiesMember
$ 813us-gaap_AccrualForEnvironmentalLossContingenciesGross
/ us-gaap_BalanceSheetLocationAxis
= sri_AccruedExpensesAndOtherCurrentLiabilitiesMember
                       
Line of credit               2,000us-gaap_LineOfCredit
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_LetterOfCreditMember
                     
Loss contingency, estimate of possible loss       15,000us-gaap_LossContingencyEstimateOfPossibleLoss
/ us-gaap_StatementBusinessSegmentsAxis
= sri_ElectronicsMember
14,000us-gaap_LossContingencyEstimateOfPossibleLoss
/ us-gaap_StatementBusinessSegmentsAxis
= sri_ElectronicsMember
      8,100us-gaap_LossContingencyEstimateOfPossibleLoss
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= sri_PstEletronicaltdaMember
25,842us-gaap_LossContingencyEstimateOfPossibleLoss
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= sri_PstEletronicaltdaMember
14,000us-gaap_LossContingencyEstimateOfPossibleLoss
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= sri_PstEletronicaltdaMember
37,237us-gaap_LossContingencyEstimateOfPossibleLoss
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= sri_PstEletronicaltdaMember
             
Equity method investment, ownership percentage                                     49.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= sri_MindaStoneridgeInstrumentsLtdMember
Loss contingencies aggregate tax assessment not accrued                 28,800sri_LossContingenciesAggregateTaxAssessmentNotAccrued
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= sri_PstEletronicaltdaMember
92,500sri_LossContingenciesAggregateTaxAssessmentNotAccrued
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= sri_PstEletronicaltdaMember
    4,100sri_LossContingenciesAggregateTaxAssessmentNotAccrued
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= sri_ValueAddedTaxMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= sri_PstEletronicaltdaMember
13,200sri_LossContingenciesAggregateTaxAssessmentNotAccrued
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= sri_ValueAddedTaxMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= sri_PstEletronicaltdaMember
3,600sri_LossContingenciesAggregateTaxAssessmentNotAccrued
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= sri_InterestOnTaxMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= sri_PstEletronicaltdaMember
11,400sri_LossContingenciesAggregateTaxAssessmentNotAccrued
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= sri_InterestOnTaxMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= sri_PstEletronicaltdaMember
21,100sri_LossContingenciesAggregateTaxAssessmentNotAccrued
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= sri_PenaltiesOnTaxMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= sri_PstEletronicaltdaMember
67,900sri_LossContingenciesAggregateTaxAssessmentNotAccrued
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= sri_PenaltiesOnTaxMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= sri_PstEletronicaltdaMember
 
Percentage of state value added tax 25.00%sri_PercentageOfStateValueAddedTax                                    
Percentage ownership in consolidated subsidiary                 74.00%us-gaap_SaleOfStockPercentageOfOwnershipAfterTransaction
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= sri_PstEletronicaltdaMember
74.00%us-gaap_SaleOfStockPercentageOfOwnershipAfterTransaction
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= sri_PstEletronicaltdaMember
                 
Product warranty and recall accrual   $ 1,188us-gaap_ProductWarrantyAccrualNoncurrent $ 1,204us-gaap_ProductWarrantyAccrualNoncurrent