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Share-Based Compensation Plans (Schedule of the Allocation of Performance Shares Between Total Shareholder Return and Earnings per Share) (Details) - Performance Based Awards [Member]	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total shareholder return	62.00%	55.00%	36.00%
Earnings per share	38.00%	45.00%	64.00%

X

- Definition

Percent of award allocated to earnings per share

+ References

No definition available.

+ Details

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Namespace Prefix:	sri_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percent of award allocated to total shareholder return

+ References

No definition available.

+ Details

Name:	sri_PercentOfAwardAllocatedToTotalShareholderReturn
Namespace Prefix:	sri_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_AwardTypeAxis=sri_PerformanceBasedAwardsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: