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Commitments and Contingencies (Narrative) (Details) R$ in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2020 USD ($) | Jun. 30, 2020 USD ($) | Dec. 31, 2019 USD ($) | Jun. 30, 2020 BRL (R$) | Dec. 31, 2019 BRL (R$)
Short-term Debt [Line Items] |  |  |  |  |
Environmental remediation accrued undiscounted liability | $ 174 | $ 174 | $ 82 |  |
Environmental remediation cost incurred | 103 | 105 |  |  |
Product warranty and recall accrual | 3,156 | 3,156 | 3,111 |  |
Selling, General and Administrative Expenses [Member] |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |
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 |  |
Letter of Credit [Member] |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |
Line of credit | 1,489 | 1,489 |  |  |
Stoneridge Brazil [Member] | Civil, labor and other tax contingencies [Member] |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |
Loss contingency, estimate of possible loss | $ 5,600 | $ 5,600 | $ 7,300 | R$ 30,800 | R$ 29,200

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