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 Derivative Hedges, USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Aluminum Futures Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of pre-tax gain (loss) recognized in other comprehensive income	$ 264	$ (387)
Aluminum Futures Contracts | Cost Of Sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of pre-tax gain (loss) reclassified from accumulated other comprehensive income to net income (effective portion)	(37)	42
Foreign Currency Forwards And Options
Derivative Instruments, Gain (Loss) [Line Items]
Amount of pre-tax gain (loss) recognized in other comprehensive income	$ 8	$ (389)