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Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Taxes [Abstract]
Statutory U.S. deferal income tax rate	(35.00%)us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	(35.00%)us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
State income taxes, net of federal tax benefit		2.40%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	(4.90%)us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
Tax credits	(1.30%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits	(3.50%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits
Foreign rate differential	0.20%us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	(9.50%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	(20.30%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
Increase (reduction) of income tax accruals	0.20%sri_EffectiveIncomeTaxRateReconciliationChangeInIncomeTaxAccrual	(1.10%)sri_EffectiveIncomeTaxRateReconciliationChangeInIncomeTaxAccrual	0.60%sri_EffectiveIncomeTaxRateReconciliationChangeInIncomeTaxAccrual
Tax on foreign dividends, net of foreign tax credits	(0.10%)us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsDividends	(8.10%)us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsDividends	17.50%us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsDividends
Reduction of deferred taxes		0.60%sri_EffectiveIncomeTaxRateReconciliationReductionOfDeferredTaxes	7.60%sri_EffectiveIncomeTaxRateReconciliationReductionOfDeferredTaxes
Valuation allowances	(2.10%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	(6.20%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	15.80%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance
Non-deductible goodwill impairment	33.90%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense
Non-deductible compensation	1.00%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	3.00%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	15.30%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost
Other	(0.30%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments	(0.60%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments	2.60%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments
Effective income tax rate	(3.50%)us-gaap_EffectiveIncomeTaxRateContinuingOperations	12.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations	(0.80%)us-gaap_EffectiveIncomeTaxRateContinuingOperations

X

- Definition

The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to the change in income tax accruals under enacted tax laws

+ References

No definition available.

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to the reduction of deferred taxes under enacted tax laws

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax credits. Including, but not limited to, research credit, foreign tax credit, investment tax credit, and other tax credits.

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