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Represents the adjustment to dividends payable which are subject to change based on a price index.

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The period over which contribution has to be completed.

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Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Amount of income (loss) for proportionate share of equity method investee's income (loss).

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Amount of increase (decrease) in fair value adjustment on other assets (liabilities) carried at fair value under the fair value option on the statement of cash flows of Federal Home Loan Banks (FHLBanks).

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Amount of financial support to be provided in future by investment company to investee.

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Amount of financial support committed by investment company to investee that is discretionary.

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Amount of investments, and noncurrent assets classified as other.

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Amount of investments classified as other.

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Percentage of subsidiary's or equity investee's stock owned by parent company after stock transaction.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Investments (Narrative) (Details) R$ in Thousands, $ in Thousands	3 Months Ended		6 Months Ended		64 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	May 15, 2017	Dec. 31, 2019 USD ($)	Dec. 31, 2019 BRL (R$)	Jun. 30, 2019 BRL (R$)	Dec. 31, 2018 USD ($)	May 16, 2017
Schedule of Equity Method Investments [Line Items]
Income (loss) from equity method investments	$ (231)	$ 548	$ 226	$ 912
Fair value and other adjustments	(100)	$ 16	(139)	$ 16
Investment	$ 36,409		$ 36,409			$ 32,437
MSIL
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	49.00%	49.00%	49.00%	49.00%				49.00%
Equity method investments	$ 12,113		$ 12,113			12,701
Income (loss) from equity method investments	(231)	$ 548	226	$ 912
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, Price Index Adjustment		150		150				R$ 580
Stoneridge Brazil [Member] \| Noncontrolling interest
Schedule of Equity Method Investments [Line Items]
Dividends payable						6,010	R$ 24,154
Autotech Ventures [Member] \| Venture Capital Funds [Member]
Schedule of Equity Method Investments [Line Items]
Investment commitment						10,000			$ 10,000
Investment	2,438		$ 2,438			$ 1,827
Contribution expected period (in years)			10 years
Contribution by company	$ 750	$ 1,200	$ 750	$ 1,200