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Net Income (Loss) Per Share (Details Textual) (USD $)	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Equity Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	20,000	65,000
Antidilutive Shares Outstanding Weighted Average Exercise Price	$ 15.73	$ 12.03
Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	663,750	696,300

X

- Definition

The value represents the antidilutive shares outstanding weighted average exercise price.

+ References

No definition available.

+ Details

Name:	sri_AntidilutiveSharesOutstandingWeightedAverageExercisePrice
Namespace Prefix:	sri_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Antidilution

-URI http://asc.fasb.org/extlink&oid=6505113



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Diluted Earnings Per Share

-URI http://asc.fasb.org/extlink&oid=6510752



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Contingent Stock Agreement

-URI http://asc.fasb.org/extlink&oid=6508534

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration