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Accrued Expenses (Schedule Of Reconciliation Of Beginning And Ending Balances Of Accrued Expenses Associated With Asset Impairments And Costs Associated With Exit And Disposal Activities) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Restructuring Cost and Reserve [Line Items]      
Beginning balance $ 197 $ 1,830 $ 3,981
Charges 4,894 1,908 773
Cash spent (3,133) (2,174) (2,316)
Charged against assets (1,077) (1,367) (608)
Ending balance 881 197 1,830
Severance [Member]
      
Restructuring Cost and Reserve [Line Items]      
Beginning balance 197 237 823
Charges 1,562 541 165
Cash spent (1,463) (581) (751)
Ending balance 296 197 237
Long-Lived Asset Impairments [Member]
      
Restructuring Cost and Reserve [Line Items]      
Charges 1,077 1,367 608
Charged against assets (1,077) (1,367) (608)
Other [Member]
      
Restructuring Cost and Reserve [Line Items]      
Beginning balance   1,593 [1] 3,158 [1]
Charges 2,255 [1]    
Cash spent (1,670) [1] (1,593) [1] (1,565) [1]
Ending balance $ 585 [1]   $ 1,593 [1]
[1] Other includes primarily accrued losses on a sub-lease at a facility in Princeton, New Jersey and other shutdown-related costs associated with the shutdown of our aluminum extrusions manaufacturing facility in Kentland, Indiana.