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Investments (Narrative) (Details) R$ in Thousands, $ in Thousands	12 Months Ended			64 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	May 15, 2015	Dec. 31, 2019 BRL (R$)	May 16, 2017
Schedule of Equity Method Investments [Line Items]
Income (loss) from equity method investments	$ 1,536	$ 1,578	$ 2,038
Investment	53,978	$ 32,437
Selling, General and Administrative Expenses [Member] | Venture Capital Funds [Member]
Schedule of Equity Method Investments [Line Items]
Contribution	$ 1,550
MSIL
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	49.00%	49.00%	49.00%		49.00%
Equity method investments	$ 13,547	$ 12,701
Income (loss) from equity method investments	$ 1,477	1,578	$ 2,038
Stoneridge Brazil [Member]
Schedule of Equity Method Investments [Line Items]
Percentage ownership in consolidated subsidiary				74.00%
Percentage of additional noncontrolling interest acquired						26.00%
Dividends payable		6,010			R$ 24,154
Dividends Payable, Price Index Adjustment		921			R$ 3,703
Autotech Ventures [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	6.70%
Income (loss) from equity method investments	$ 59	(211)
Autotech Ventures [Member] | Venture Capital Funds [Member]
Schedule of Equity Method Investments [Line Items]
Investment commitment			$ 10,000
Contribution expected period (in years)			10 years
Contribution		1,600
Investment	$ 3,436	$ 1,827

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