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Plants Shutdowns, Asset Impairments, Restructurings And Other (Schedule Of Accrued Expenses Associated With Asset Impairments And Exit And Disposal Activities) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
Restructuring Cost and Reserve [Line Items]  
Balance at December 31, 2012 $ 881
Charges 101
Cash spent (166)
Balance at March 31, 2013 816
Severance [Member]
  
Restructuring Cost and Reserve [Line Items]  
Balance at December 31, 2012 296
Charges 101
Cash spent (116)
Balance at March 31, 2013 281
Other [Member]
  
Restructuring Cost and Reserve [Line Items]  
Balance at December 31, 2012 585 [1]
Cash spent (50) [1]
Balance at March 31, 2013 $ 535 [1]
[1] Other includes other shutdown-related costs associated with the shutdown of our aluminum extrusions manaufacturing facility in Kentland, Indiana.