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Commitments and Contingencies (Narrative) (Details) R$ in Thousands, $ in Thousands, item in Millions | 1 Months Ended | 3 Months Ended | 24 Months Ended |  |
--- | --- | --- | --- | --- | ---
Feb. 28, 2018 USD ($) | Mar. 31, 2018 USD ($) item plaintiff | Mar. 31, 2017 USD ($) | Dec. 31, 2010 | Mar. 31, 2018 BRL (R$) | Mar. 31, 2018 USD ($) | Dec. 31, 2017 BRL (R$) | Dec. 31, 2017 USD ($)
Short-term Debt [Line Items] |  |  |  |  |  |  |  |
Environmental remediation accrued undiscounted liability |  |  |  |  |  | $ 132 |  | $ 265
Number of vehicles the plaintiff states are effected | item |  | 1 |  |  |  |  |  |
Loss recoveries and insurance gain contingencies |  |  |  |  |  |  |  | 1,644
Cash proceeds related to damaged inventory and incremental costs |  | $ 241 | $ 500 |  |  |  |  |
Cash proceeds within cash flows from investing activities |  | $ 1,403 |  |  |  |  |  |
Product warranty and recall accrual |  |  |  |  |  | 3,347 |  | 3,112
Royal v. Stoneridge, Inc. [Member] |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |
Number of people the plaintiff states have damages | plaintiff |  | 3 |  |  |  |  |  |
Litigation liability |  |  |  |  |  | 93 |  | 525
Royal v. Stoneridge, Inc, Attorney's Fees [Member] |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |
Loss contingency, estimate of possible loss |  |  |  |  |  | 375 |  |
Legal settlement payment | $ 375 |  |  |  |  |  |  |
Royal v. Stoneridge, Inc, Awarded Incentive Payments [Member] |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |
Legal settlement payment | $ 15 |  |  |  |  |  |  |
Accrued Expenses and Other Current Liabilities [Member] |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |
Environmental remediation accrued undiscounted liability |  |  |  |  |  | 132 |  | 253
Letter of Credit [Member] |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |
Line of credit |  |  |  |  |  | 1,489 |  |
PST Eletronica Ltda [Member] |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |
Litigation liability |  |  |  |  |  | 0 |  | 0
Percentage of state value added tax |  |  |  | 25.00% |  |  |  |
PST Eletronica Ltda [Member] | Civil, labor and other tax contingencies [Member] |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |
Loss contingency, estimate of possible loss |  |  |  |  | R$ 38,100 | $ 11,500 | R$ 33,800 | $ 10,200
Maximum [Member] | Royal v. Stoneridge, Inc. [Member] |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |
Maximum loss per plaintiff |  | $ 5 |  |  |  |  |  |

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