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Derivative Financial Instruments (Schedule Of Pretax Effect On Net Income (Loss) And Other Comprehensive Income (Loss) Of Derivative Instruments Classified As Cash Flow Hedges) (Details) - Cash Flow Hedging - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Aluminum Futures Contracts | Cost of goods sold
Derivative Instruments, Gain (Loss) [Line Items]
Amount of pre-tax gain (loss) recognized in other comprehensive income (loss)	$ 2,908	$ (2,320)	$ 4,867	$ (6,060)
Amount of pre-tax gain (loss) reclassified from accumulated other comprehensive income (loss) to net income (effective portion)	1,716	837	3,273	2,135
Foreign Currency Forwards | Cost of goods sold
Derivative Instruments, Gain (Loss) [Line Items]
Amount of pre-tax gain (loss) recognized in other comprehensive income (loss)	0	0	0	0
Amount of pre-tax gain (loss) reclassified from accumulated other comprehensive income (loss) to net income (effective portion)	16	16	46	46
Foreign Currency Forwards | Selling, general & admin
Derivative Instruments, Gain (Loss) [Line Items]
Amount of pre-tax gain (loss) recognized in other comprehensive income (loss)	(621)	115	2,985	2,177
Amount of pre-tax gain (loss) reclassified from accumulated other comprehensive income (loss) to net income (effective portion)	$ 1,024	$ 306	$ 2,031	$ 975

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4E
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-4E

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Amount, before tax and reclassification, of gain (loss) from derivative instrument designated and qualifying cash flow hedge included in assessment of hedge effectiveness.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 11
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Amount, before tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
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