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Commitments and Contingencies (Narrative) (Details) R$ in Thousands, $ in Thousands			12 Months Ended
	Aug. 12, 2020 USD ($)	Aug. 12, 2020 BRL (R$)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2020 BRL (R$)	Dec. 31, 2019 BRL (R$)	Dec. 31, 2017 USD ($)
Short-term Debt [Line Items]
Environmental remediation accrued undiscounted liability			$ 180	$ 82
Environmental remediation cost incurred			128
Loss recoveries and insurance gain contingencies								$ 1,644
Product warranty and recall accrual			3,647	3,111
Cash proceeds related to damaged inventory and incremental costs			0		$ 241
Cash proceeds within cash flows from investing activities					1,403
Selling, General and Administrative Expenses [Member]
Short-term Debt [Line Items]
Insurance recoveries			0	0	$ 0
Gain on litigation				6,473
Interest Income [Member]
Short-term Debt [Line Items]
Gain on litigation				2,392
Professional Fees [Member]
Short-term Debt [Line Items]
Gain on litigation				990
Stoneridge Brazil [Member]
Short-term Debt [Line Items]
Litigation amount	$ 1,538	R$ 7,995
Letter of Credit [Member]
Short-term Debt [Line Items]
Line of credit			1,489
Stoneridge Brazil [Member] | Civil, labor and other tax contingencies [Member]
Short-term Debt [Line Items]
Loss contingency, estimate of possible loss			$ 8,416	$ 7,300		R$ 43,736	R$ 29,700

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Undiscounted amount of the accrual for environmental loss contingencies.

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