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Goodwill And Related Intangible Assets (Schedule Of Amortization Expense) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Goodwill And Related Intangible Assets [Abstract]  
2012 $ 4,879
2013 5,716
2014 4,828
2015 4,692
2016 4,357
2017 $ 3,988