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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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