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Segment Reporting (Schedule Of Identifiable Assets By Segment) (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Jun. 30, 2013
Dec. 31, 2012
Subtotal $ 717,577 $ 691,801    
General corporate 44,900 48,590    
Cash and cash equivalents 44,008 52,617 44,427 48,822
Total assets 806,485 793,008    
Film Products
       
Total assets 576,100 556,873    
Aluminum Extrusions
       
Total assets $ 141,477 $ 134,928