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Derivative Financial Instruments (Narrative) (Details) R$ in Thousands, $ in Thousands, lbs in Millions | 9 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2023 USD ($) lbs | Sep. 30, 2023 BRL (R$) | Sep. 30, 2023 BRL (R$) lbs | Dec. 31, 2022 USD ($) lbs
Derivative [Line Items] |  |  |  |
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months | $ (1,100) |  |  |
Aluminum Futures Contracts |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, Notional Amount | $ 10,900 |  |  | $ 30,700
Commitment Under Cash Flow Hedges, Mass | lbs | 7.4 |  | 7.4 | 20.3
Terphane Ltda [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, Notional Amount | $ 27,541 |  | R$ 150,515 |
Terphane Ltda [Member] | Oct-2018 [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Annual Net Costs Mismatch Translation Exposure - Real vs US Dollar | R$ |  | R$ 177,000 |  |

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