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Derivative Financial Instruments (Summary Of Location And Fair Value Of Derivative Financial Instruments) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 1,146	$ 2,196
Aluminum Futures Contracts
Derivatives, Fair Value [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net	(290)	(492)
Derivatives Designated As Hedging Instruments [Member] | Accrued Expenses [Member]
Derivatives, Fair Value [Line Items]
Liability derivatives: Fair Value	6	0
Derivatives Designated As Hedging Instruments [Member] | Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	1,154	2,050
Derivatives Designated As Hedging Instruments [Member] | Other non-current liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives: Fair Value	2	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] | Aluminum Futures Contracts | Accrued Expenses [Member]
Derivatives, Fair Value [Line Items]
Liability derivatives: Fair Value	(318)	(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 | Other Noncurrent Assets
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 28	$ 0

X

- Definition

Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

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Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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