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Debt (Schedule of Debt) (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2021 | Dec. 31, 2020
Debt Instrument [Line Items] |  |
Revolving credit facility | $ 130,000 | $ 136,000
Debt: |  |
Total debt | 1,650 | 7,673
Less: current portion | (1,650) | (7,673)
Revolving Credit Facility [Member] |  |
Debt Instrument [Line Items] |  |
Revolving credit facility | $ 130,000 | 136,000
Debt: |  |
Debt, maturity | June 2024 |
Suzhou Short-Term Credit Line [Member] |  |
Debt Instrument [Line Items] |  |
Revolving credit facility | $ 1,551 | 4,521
Debt: |  |
Debt, maturity | May 2022 |
Minimum [Member] | Revolving Credit Facility [Member] |  |
Debt: |  |
Long-term debt, weighted average interest rate | 1.95% |
Minimum [Member] | Suzhou Short-Term Credit Line [Member] |  |
Debt: |  |
Outstanding credit lines interest rate | 4.30% |
Sweden Short-Term Note [Member] |  |
Debt Instrument [Line Items] |  |
Revolving credit facility |  | 1,591
Stoneridge Brazil Short-Term Obligations [Member] |  |
Debt Instrument [Line Items] |  |
Short-term debt | $ 99 | $ 1,561
Debt: |  |
Debt, maturity | November 2021 |
Short-term debt, weighted average interest rate | 8.80% |

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