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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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