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Derivative Financial Instruments (Summary Of Location And Fair Value Of Derivative Financial Instruments) (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Derivative Assets (Liabilities), at Fair Value, Net | $ (437) | $ 2,196
Derivatives Designated As Hedging Instruments [Member] | Accrued Expenses [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Liability derivatives: Fair Value | (685) | 0
Derivatives Designated As Hedging Instruments [Member] | Other Noncurrent Assets |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset | 0 | 146
Derivatives Designated As Hedging Instruments [Member] | Prepaid Expenses and Other Current Assets |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset | 248 | 2,050
Derivatives Designated As Hedging Instruments [Member] | Aluminum Futures Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets (Liabilities), at Fair Value, Net | 63 | (492)
Derivatives Designated As Hedging Instruments [Member] | Aluminum Futures Contracts | Accrued Expenses [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Liability derivatives: Fair Value | 220 | 483
Derivatives Designated As Hedging Instruments [Member] | Aluminum Futures Contracts | Other non-current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Liability derivatives: Fair Value | 0 | 9
Derivatives Designated As Hedging Instruments [Member] | Aluminum Futures Contracts | Prepaid Expenses and Other Current Assets |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset | $ 283 | $ 0

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