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Investment Securities (Details) (USD $)
In Thousands, unless otherwise specified
9 Months Ended 12 Months Ended
Sep. 30, 2013
Dec. 31, 2012
Available-for-sale securities, Amortized Cost $ 136,767 $ 142,333
Available-for-sale securities, Gross Unrealized Gains 447 3,392
Available-for-sale securities, Gross Unrealized Losses 1,352 217
Available-for-sale securities, Estimated Fair Value 135,862 145,508
Held-to-maturity securities, Amortized Cost 2,357 2,657
Held-to-maturity securities, Estimated Fair Value 2,471 2,884
US Treasury Securities [Member]
   
Available-for-sale securities, Amortized Cost 5,375  
Available-for-sale securities, Gross Unrealized Gains 0  
Available-for-sale securities, Gross Unrealized Losses 6  
Available-for-sale securities, Estimated Fair Value 5,369  
Collateralized Mortgage Backed Securities [Member]
   
Available-for-sale securities, Amortized Cost 84,234 106,524
Available-for-sale securities, Gross Unrealized Gains 389 2,464
Available-for-sale securities, Gross Unrealized Losses 952 208
Available-for-sale securities, Estimated Fair Value 83,671 108,780
Equity Securities [Member]
   
Available-for-sale securities, Amortized Cost 606 596
Available-for-sale securities, Gross Unrealized Gains 2 25
Available-for-sale securities, Gross Unrealized Losses 0 0
Available-for-sale securities, Estimated Fair Value 608 621
Held-to-maturity securities, Amortized Cost 0  
Held-to-maturity securities, Estimated Fair Value 0  
US States and Political Subdivisions Debt Securities [Member]
   
Held-to-maturity securities, Amortized Cost 2,357 2,657
Held-to-maturity securities, Gross Unrealized Gains 114 227
Held-to-maturity securities, Gross Unrealized Losses 0 0
Held-to-maturity securities, Estimated Fair Value 2,471 2,884
US Government Corporations and Agencies Securities [Member]
   
Available-for-sale securities, Amortized Cost 46,552 35,213
Available-for-sale securities, Gross Unrealized Gains 56 903
Available-for-sale securities, Gross Unrealized Losses 394 9
Available-for-sale securities, Estimated Fair Value $ 46,214 $ 36,107