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Commitments and Contingencies (Narrative) (Details)
In Thousands, unless otherwise specified
0 Months Ended 24 Months Ended 36 Months Ended
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Dec. 31, 2014
Electronics [Member]
USD ($)
Dec. 31, 2014
Electronics [Member]
EUR (€)
Dec. 31, 2014
Control Devices [Member]
USD ($)
Dec. 31, 2013
Control Devices [Member]
USD ($)
Dec. 31, 2014
Accrued Expenses and Other Current Liabilities [Member]
Control Devices [Member]
USD ($)
Dec. 31, 2013
Accrued Expenses and Other Current Liabilities [Member]
Control Devices [Member]
USD ($)
Dec. 31, 2014
Letter of Credit [Member]
USD ($)
Dec. 31, 2011
PST Eletronicaltda [Member]
Dec. 31, 2010
PST Eletronicaltda [Member]
Dec. 31, 2014
PST Eletronicaltda [Member]
USD ($)
Dec. 31, 2014
PST Eletronicaltda [Member]
BRL
Dec. 31, 2013
PST Eletronicaltda [Member]
USD ($)
Dec. 31, 2013
PST Eletronicaltda [Member]
BRL
Dec. 31, 2014
PST Eletronicaltda [Member]
Value Addedtax [Member]
USD ($)
Dec. 31, 2014
PST Eletronicaltda [Member]
Value Addedtax [Member]
BRL
Dec. 31, 2014
PST Eletronicaltda [Member]
Interest On Tax [Member]
USD ($)
Dec. 31, 2014
PST Eletronicaltda [Member]
Interest On Tax [Member]
BRL
Dec. 31, 2014
PST Eletronicaltda [Member]
Penalties On Tax [Member]
USD ($)
Dec. 31, 2014
PST Eletronicaltda [Member]
Penalties On Tax [Member]
BRL
Dec. 31, 2014
Minda Stoneridge Instruments Ltd [Member]
Dec. 31, 2013
Minda Stoneridge Instruments Ltd [Member]
Dec. 31, 2012
Minda Stoneridge Instruments Ltd [Member]
Short-term Debt [Line Items]                                                
Environmental remediation accrued undiscounted liability         $ 876us-gaap_AccrualForEnvironmentalLossContingenciesGross
/ us-gaap_StatementBusinessSegmentsAxis
= sri_ControlDevicesMember
$ 944us-gaap_AccrualForEnvironmentalLossContingenciesGross
/ us-gaap_StatementBusinessSegmentsAxis
= sri_ControlDevicesMember
$ 813us-gaap_AccrualForEnvironmentalLossContingenciesGross
/ us-gaap_BalanceSheetLocationAxis
= sri_AccruedExpensesAndOtherCurrentLiabilitiesMember
/ us-gaap_StatementBusinessSegmentsAxis
= sri_ControlDevicesMember
$ 683us-gaap_AccrualForEnvironmentalLossContingenciesGross
/ us-gaap_BalanceSheetLocationAxis
= sri_AccruedExpensesAndOtherCurrentLiabilitiesMember
/ us-gaap_StatementBusinessSegmentsAxis
= sri_ControlDevicesMember
                               
Line of credit                 2,000us-gaap_LineOfCredit
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_LetterOfCreditMember
                             
Loss contingency, estimate of possible loss     16,937us-gaap_LossContingencyEstimateOfPossibleLoss
/ us-gaap_StatementBusinessSegmentsAxis
= sri_ElectronicsMember
14,000us-gaap_LossContingencyEstimateOfPossibleLoss
/ us-gaap_StatementBusinessSegmentsAxis
= sri_ElectronicsMember
              14,019us-gaap_LossContingencyEstimateOfPossibleLoss
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= sri_PstEletronicaltdaMember
37,237us-gaap_LossContingencyEstimateOfPossibleLoss
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= sri_PstEletronicaltdaMember
11,469us-gaap_LossContingencyEstimateOfPossibleLoss
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= sri_PstEletronicaltdaMember
26,867us-gaap_LossContingencyEstimateOfPossibleLoss
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= sri_PstEletronicaltdaMember
                 
Equity method investment, ownership percentage                     50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= sri_PstEletronicaltdaMember
                    49.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= sri_MindaStoneridgeInstrumentsLtdMember
49.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= sri_MindaStoneridgeInstrumentsLtdMember
49.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= sri_MindaStoneridgeInstrumentsLtdMember
Loss contingencies aggregate tax assessment not accrued                       34,800sri_LossContingenciesAggregateTaxAssessmentNotAccrued
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= sri_PstEletronicaltdaMember
92,500sri_LossContingenciesAggregateTaxAssessmentNotAccrued
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= sri_PstEletronicaltdaMember
    5,000sri_LossContingenciesAggregateTaxAssessmentNotAccrued
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= sri_ValueAddedtaxMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= sri_PstEletronicaltdaMember
13,200sri_LossContingenciesAggregateTaxAssessmentNotAccrued
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= sri_ValueAddedtaxMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= sri_PstEletronicaltdaMember
4,300sri_LossContingenciesAggregateTaxAssessmentNotAccrued
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= sri_InterestOnTaxMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= sri_PstEletronicaltdaMember
11,400sri_LossContingenciesAggregateTaxAssessmentNotAccrued
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= sri_InterestOnTaxMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= sri_PstEletronicaltdaMember
25,500sri_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
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= sri_PstEletronicaltdaMember
                         
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
74.00%us-gaap_SaleOfStockPercentageOfOwnershipAfterTransaction
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= sri_PstEletronicaltdaMember
                     
Product warranty and recall accrual 1,204us-gaap_ProductWarrantyAccrualNoncurrent 1,019us-gaap_ProductWarrantyAccrualNoncurrent                                            
Accounts payable and accrued liabilities     $ 0us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent
/ us-gaap_StatementBusinessSegmentsAxis
= sri_ElectronicsMember