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Investments (Narrative) (Details) R$ in Thousands, $ in Thousands		3 Months Ended	12 Months Ended			65 Months Ended
	May 16, 2017 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	May 15, 2017	Dec. 31, 2019 BRL (R$)	Dec. 31, 2018 BRL (R$)	Dec. 31, 2016 USD ($)
Schedule of Equity Method Investments [Line Items]
Income (loss) from equity method investments			$ 1,578	$ 2,038	$ 1,636
Investment		$ 28,380	32,437	$ 28,380
Selling, General and Administrative Expenses [Member] | Venture Capital Funds [Member]
Schedule of Equity Method Investments [Line Items]
Contribution			$ 1,600
MSIL
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage		49.00%	49.00%	49.00%	49.00%		49.00%	49.00%
Equity method investments		$ 11,288	$ 12,701	$ 11,288
Income (loss) from equity method investments			1,578	2,038	$ 1,636
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%
Noncontrolling interest	$ 14,458								$ 13,762
Dividends payable		5,980	6,010	5,980			R$ 24,154	R$ 23,204
Payments to Noncontrolling Interests	1,500
Dividends Payable, Price Index Adjustment		709	921	709			R$ 3,703	R$ 2,752
Stoneridge Brazil [Member] | Accumulated Foreign Currency Adjustment Attributable to Noncontrolling Interest [Member]
Schedule of Equity Method Investments [Line Items]
Noncontrolling interest	16,995
Stoneridge Brazil [Member] | Additional Paid-In Capital
Schedule of Equity Method Investments [Line Items]
Noncontrolling interest	$ 31,453
Autotech Ventures [Member] | Venture Capital Funds [Member]
Schedule of Equity Method Investments [Line Items]
Investment commitment		10,000		$ 10,000
Contribution expected period (in years)				10 years
Contribution		437
Investment		$ 437	$ 1,827	$ 437

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