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Segment Reporting (Details Textual) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2011 PST - Consolidated [Member] | Dec. 31, 2010 Electronics [Member] | Dec. 31, 2010 Control Devices [Member] | Dec. 31, 2010 Corporate Activities [Member]
Business Acquisition One Time Non Cash Gain Pre Tax | $ 65,372 |  |  |
Gain On Reorganization |  | 32,512 |  |
Loss On Reorganization |  |  | $ 473 | $ 32,039

X
- Definition Amount of one-time non-cash gain before tax resulted in obtaining a controlling interest. + References No definition available. + Details
Name: | sri_BusinessAcquisitionOneTimeNonCashGainPreTax
Namespace Prefix: | sri_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of gain reorganized from placing the company in administration + References No definition available. + Details
Name: | sri_GainOnReorganization
Namespace Prefix: | sri_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of loss recognized from the placing the company in administration + References No definition available. + Details
Name: | sri_LossOnReorganization
Namespace Prefix: | sri_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration