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Goodwill And Other Intangible Assets (Components Of Other Intangible Assets) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
years
Dec. 31, 2010
Finite Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 32,869 $ 17,441
Accumulated Amortization 7,827 6,466
Customer Relationships [Member]
    
Finite Lived Intangible Assets [Line Items]    
Intangible asset, useful life, in years 18.7  
Gross Carrying Amount 32,520 17,441
Accumulated Amortization 7,771 6,466
Other Intangible Assets [Member]
    
Finite Lived Intangible Assets [Line Items]    
Intangible asset, useful life, in years 2.6  
Gross Carrying Amount 349   
Accumulated Amortization $ 56