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Investments (Details) (Pst Eletronica Ltda [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2011
Pst Eletronica Ltda [Member]
Net sales	$ 65,638	$ 181,854
Cost of goods sold	37,965	103,466
Total income before income taxes	2,245	10,175
Stoneridge, Inc.'s share of income before income taxes	$ 1,123	$ 5,087

X

- Definition

This item represents the entity's proportionate share for the period of the income (loss) before income taxes of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied.

+ References

No definition available.

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- Definition

The amount of the cost of sales reported by an equity method investment of the entity.

+ References

No definition available.

+ Details

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X

- Definition

The amount of income (loss) from continuing operations before extraordinary items reported by an equity method investment of the entity.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 159

-Paragraph 18

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

The amount of revenue from sale of goods and services reduced by sales returns, allowances, and discounts reported by an equity method investment of the entity.

+ References

No definition available.

+ Details

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