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Intangible And Other Assets (Schedule Of Estimated Aggregate Future Amortization Expense For Intangible Assets) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Intangible And Other Assets [Abstract]  
2012 $ 5,254
2013 4,478
2014 3,990
2015 3,496
2016 $ 2,936