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Investment Securities (Details 1) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Available for sale    
Available for sale due in one year or less, amortized cost $ 6,498  
Available for sale due in one year or less, estimated fair value 6,499  
Available for sale due after one year through five years, amortized cost 71,671  
Available for sale due after one year through five years, estimated fair vale 71,891  
Available for sale due after five years through ten years, amortized cost 0  
Available for sale due after five years through ten years, estimated fair value 0  
Available for sale due after ten years, amortized cost 0  
Available for sale due after ten years, estimated fair value 0  
Available for sale, amortized cost 78,169  
Available for sale, estimated fair value 78,390  
Total investment securities available for sale, amortized cost 79,499 17,864
Securities available for sale, at market 79,709 17,845
Held to maturity    
Held to maturity Due in one year or less, amortized cost 0  
Held to maturity Due in one year or less, estimated fair value 0  
Held to maturity Due after one year through five years, amortized cost 0  
Held to maturity Due after one year through five years, estimated fair value 0  
Held to maturity Due after five years through ten years, amortized cost 0  
Held to maturity Due after five years through ten years, estimated fair value 0  
Held to maturity Due after ten years, amortized cost 0  
Held to maturity Due after ten years, estimated fair value 0  
Held to maturity, amortized cost 0  
Held to maturity, estimated fair value 0  
Securities held to maturity, at cost 939 3,083
Total investment securities held to maturity, estimated fair value 997 3,135
Mortgage-backed securities [Member]
   
Available for sale    
Total investment securities available for sale, amortized cost 1,230 1,469
Securities available for sale, at market 1,275 1,501
Held to maturity    
Securities held to maturity, at cost 939  
Total investment securities held to maturity, estimated fair value 997  
Corporate equity securities [Member]
   
Available for sale    
Total investment securities available for sale, amortized cost 100 106
Securities available for sale, at market 44 52
Held to maturity    
Securities held to maturity, at cost 0  
Total investment securities held to maturity, estimated fair value $ 0