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Commitments And Contingencies (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Standby Letters Of Credit [Member]
   
Commitments And Contingencies [Line Items]    
Contractual obligations $ 16,036 $ 16,743
Commercial Letters Of Credit [Member]
   
Commitments And Contingencies [Line Items]    
Contractual obligations 428 425
Home equity - junior lien [Member] | Commitments To Extend Credit [Member]
   
Commitments And Contingencies [Line Items]    
Contractual obligations 157,561 156,274
Commercial Real Estate [Member] | Commitments To Extend Credit [Member]
   
Commitments And Contingencies [Line Items]    
Contractual obligations 34,312 33,869
Other Commitments [Member] | Commitments To Extend Credit [Member]
   
Commitments And Contingencies [Line Items]    
Contractual obligations $ 216,336 $ 171,670