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Investment Securities (Details 2) (USD $)
Dec. 31, 2012
Dec. 31, 2011
Fair Value    
Less than 12 Months $ 51,410,000 $ 54,521,000
12 months or Longer 7,860,000 26,831,000
Total 59,270,000 81,352,000
Unrealized Losses    
Less than 12 Months (153,000) (695,000)
12 months or Longer (535,000) (885,000)
Total (688,000) (1,580,000)
Investment securities pledged as collateral 216,340,000 250,360,000
U.S. Treasury and Federal agencies securities
   
Fair Value    
Less than 12 Months 37,316,000 42,536,000
Total 37,316,000 42,536,000
Unrealized Losses    
Less than 12 Months (83,000) (50,000)
Total (83,000) (50,000)
U.S. States and political subdivisions securities
   
Fair Value    
Less than 12 Months 7,730,000 423,000
12 months or Longer 3,364,000 5,149,000
Total 11,094,000 5,572,000
Unrealized Losses    
Less than 12 Months (46,000) (9,000)
12 months or Longer (436,000) (651,000)
Total (482,000) (660,000)
Mortgage-backed securities - Federal agencies
   
Fair Value    
Less than 12 Months 6,264,000 5,071,000
12 months or Longer 60,000 13,099,000
Total 6,324,000 18,170,000
Unrealized Losses    
Less than 12 Months (24,000) (1,000)
12 months or Longer (1,000) (8,000)
Total (25,000) (9,000)
Corporate debt securities
   
Fair Value    
Less than 12 Months   4,858,000
12 months or Longer 4,431,000 8,579,000
Total 4,431,000 13,437,000
Unrealized Losses    
Less than 12 Months   (142,000)
12 months or Longer (94,000) (222,000)
Total (94,000) (364,000)
Foreign government and other securities
   
Fair Value    
Less than 12 Months 100,000 1,011,000
Total 100,000 1,011,000
Unrealized Losses    
Less than 12 Months   (1,000)
Total   (1,000)
Total debt securities
   
Fair Value    
Less than 12 Months 51,410,000 53,899,000
12 months or Longer 7,855,000 26,827,000
Total 59,265,000 80,726,000
Unrealized Losses    
Less than 12 Months (153,000) (203,000)
12 months or Longer (531,000) (881,000)
Total (684,000) (1,084,000)
Marketable equity securities
   
Fair Value    
Less than 12 Months   622,000
12 months or Longer 5,000 4,000
Total 5,000 626,000
Unrealized Losses    
Less than 12 Months   (492,000)
12 months or Longer (4,000) (4,000)
Total $ (4,000) $ (496,000)