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Investment Securities (Details 1) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Schedule of fair value and amortized cost by maturity of investment securities    
Securities available for sale, One Year or Less, Fair Value     
Securities available for sale, One Year to Five Years, Fair Value 10,406  
Securities available for sale, Five to Ten Years, Fair Value 20,937  
Securities available for sale, Over Ten Years, Fair Value 121,375  
Securities available for sale, Fair Value, Total 152,718 155,260
Securities held to maturity, One Year or Less, Fair Value 17  
Securities held to maturity, One Year to Five Years, Fair Value 2,060  
Securities held to maturity, Five to Ten Years, Fair Value 440  
Securities held to maturity, Fair Value, Total 2,517 3,575
Investment securities, One Year or Less, Fair Value 17  
Investment securities, One Year to Five Years, Fair Value 12,466  
Investment securities, Five to Ten Years, Fair Value 21,377  
Investment securities, Over Ten Years, Fair Value 121,375  
Investment securities, Fair Value, Total 155,235  
Securities available for sale, Amortized cost, One Year to Five Years 10,195  
Securities available for sale, Amortized cost, Five to Ten Years 20,290  
Securities available for sale, Amortized cost, Over Ten Years 118,096  
Securities available for sale, Amortized Cost, Total 148,581 152,644
Securities held to maturity, Amortized Cost, One Year or Less 17  
Securities held to maturity, Amortized Cost, One Year to Five Years 1,969  
Securities held to maturity, Amortized Cost, Five to Ten Years 437  
Securities held to maturity, Amortized Cost, Total 2,423 3,462
Investment securities, Amortized Cost, One Year or Less 17  
Investment securities, Amortized Cost, One Year to Five Years 12,164  
Investment securities, Amortized Cost, Five to Ten Years 20,727  
Investment securities, Amortized Cost, Over Ten Years 118,096  
Investment securities, Amortized Cost, Total 151,004  
U.S. agency mortgage-backed [Member]
   
Schedule of fair value and amortized cost by maturity of investment securities    
Securities available for sale, One Year or Less, Fair Value     
Securities available for sale, One Year to Five Years, Fair Value 1,256  
Securities available for sale, Five to Ten Years, Fair Value 8,788  
Securities available for sale, Over Ten Years, Fair Value 99,325  
Securities available for sale, Fair Value, Total 109,369 116,529
Securities held to maturity, One Year or Less, Fair Value 17  
Securities held to maturity, One Year to Five Years, Fair Value 1,017  
Securities held to maturity, Five to Ten Years, Fair Value 440  
Securities held to maturity, Fair Value, Total 1,474 2,338
Securities available for sale, Amortized cost, One Year to Five Years 1,184  
Securities available for sale, Amortized cost, Five to Ten Years 8,666  
Securities available for sale, Amortized cost, Over Ten Years 96,300  
Securities available for sale, Amortized Cost, Total 106,150 113,692
Securities held to maturity, Amortized Cost, One Year or Less 17  
Securities held to maturity, Amortized Cost, One Year to Five Years 997  
Securities held to maturity, Amortized Cost, Five to Ten Years 437  
Securities held to maturity, Amortized Cost, Total 1,451 2,289
Non-U.S. agency mortgage-backed [Member]
   
Schedule of fair value and amortized cost by maturity of investment securities    
Securities available for sale, One Year or Less, Fair Value     
Securities available for sale, Over Ten Years, Fair Value 13,628  
Securities available for sale, Fair Value, Total 13,628 13,679
Securities available for sale, Amortized cost, Over Ten Years 13,746  
Securities available for sale, Amortized Cost, Total 13,746 14,833
Municipal bonds [Member]
   
Schedule of fair value and amortized cost by maturity of investment securities    
Securities available for sale, One Year or Less, Fair Value     
Securities available for sale, One Year to Five Years, Fair Value 3,238  
Securities available for sale, Five to Ten Years, Fair Value 6,032  
Securities available for sale, Over Ten Years, Fair Value 2,923  
Securities available for sale, Fair Value, Total 12,193 12,221
Securities held to maturity, One Year to Five Years, Fair Value 1,043  
Securities held to maturity, Fair Value, Total 1,043 1,237
Securities available for sale, Amortized cost, One Year to Five Years 3,148  
Securities available for sale, Amortized cost, Five to Ten Years 5,649  
Securities available for sale, Amortized cost, Over Ten Years 2,745  
Securities available for sale, Amortized Cost, Total 11,542 11,598
Securities held to maturity, Amortized Cost, One Year to Five Years 972  
Securities held to maturity, Amortized Cost, Total 972 1,173
U.S. government agency [Member]
   
Schedule of fair value and amortized cost by maturity of investment securities    
Securities available for sale, One Year or Less, Fair Value     
Securities available for sale, One Year to Five Years, Fair Value 5,912  
Securities available for sale, Five to Ten Years, Fair Value 6,117  
Securities available for sale, Over Ten Years, Fair Value 5,499  
Securities available for sale, Fair Value, Total 17,528 12,831
Securities available for sale, Amortized cost, One Year to Five Years 5,863  
Securities available for sale, Amortized cost, Five to Ten Years 5,975  
Securities available for sale, Amortized cost, Over Ten Years 5,305  
Securities available for sale, Amortized Cost, Total $ 17,143 $ 12,521