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Goodwill And Other Intangible Assets (Changes In The Carrying Amount Of Goodwill) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Goodwill And Other Intangible Assets [Abstract]  
Balance as of December 31, 2010 and 2009 $ 38,854
Acquisitions 19,360
Balance at December 31, 2011 $ 58,214