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Derivative Instruments And Hedging Activities (Tables)
 3 Months Ended
Mar. 31, 2013
Derivative Instruments And Hedging Activities [Abstract]  
Summary Of Fair Value Of Derivative Instruments
  March 31, 2013   December 31, 2012  
  Balance Sheet Fair Balance Sheet Fair
  Location Value Location Value
 
    (dollars in thousands)  
Derivatives designated as hedging instruments under        
GAAP        
Interest rate swap contracts        
  Other Liabilities $ 587 Other Liabilities $ 635
Effect Of The Derivative Instrument On The Consolidated Balance Sheet, Consolidated Statements Of Income
          Three Months Ended      
 
          March 31,      
 
 
    Amount of Gain (Loss)          
    Recognized in OCI       Amount of Gain (Loss)
    on Derivative   Location of Gain   Recognized in Income
Derivatives in GAAP   (Effective Portion)   (Loss)   (Ineffective Portion)
Cash Flow Hedging         Recognized in Income      
Relationships   2013 2012   (Ineffective Portion)   2013 2012
 
    (dollars in thousands)       (dollars in thousands)
 
Interest rate swap contracts, net of tax $ 31 $ 12   Not applicable $ — $ —