Investments (Amortized Cost And Fair Values Classified By Contractual Maturity Date) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Schedule of Investments [Line Items]    
Amortized Cost: Due in one year or less $ 0  
Amortized Cost: Due after one year through five years 0  
Amortized Cost: Due after five years through ten years 46,897  
Amortized Cost: Due after ten years 84,260  
Amortized Cost: Sub Total 131,157  
Fair Value: Due in one year or less 0  
Fair Value: Due after one year through five years 0  
Fair Value: Due after five years through ten years 48,363  
Fair Value: Due after ten years 59,784  
Available For Sale Debt Maturities Fair Value Sub Total 108,147  
Available-for-sale Securities, Amortized Cost Basis 255,608 267,161
Available-for-sale Securities 235,331 245,023
Amortized Cost: Due after ten years 4,040  
Fair Value: Due after ten years 4,040  
Residential mortgage-backed agencies [Member]
   
Schedule of Investments [Line Items]    
Amortized Cost: without Single Maturity Date 66,404  
Fair Value: without Single Maturity Date 67,532  
Available-for-sale Securities, Amortized Cost Basis 66,404 94,332
Available-for-sale Securities 67,532 95,691
Commercial mortgage-backed agencies [Member]
   
Schedule of Investments [Line Items]    
Amortized Cost: without Single Maturity Date 58,047  
Fair Value: without Single Maturity Date 59,652  
Available-for-sale Securities, Amortized Cost Basis 58,047 44,850
Available-for-sale Securities 59,652 44,932
Collateralized mortgage obligations [Member]
   
Schedule of Investments [Line Items]    
Amortized Cost: without Single Maturity Date 0  
Fair Value: without Single Maturity Date 0  
Available-for-sale Securities, Amortized Cost Basis   680
Available-for-sale Securities   $ 557