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Loans (Details 1) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Commercial real estate [Member]
  
Maturity schedule by major category of loans  
Maturity schedule by major category of loans, Within One Year $ 24,132
Maturity schedule by major category of loans, After One Year Within Five Years 105,178
Maturity schedule by major category of loans, After Five Years 69,546
Agricultural real estate [Member]
  
Maturity schedule by major category of loans  
Maturity schedule by major category of loans, Within One Year 3,207
Maturity schedule by major category of loans, After One Year Within Five Years 9,586
Maturity schedule by major category of loans, After Five Years 19,428
Consumer real estate [Member]
  
Maturity schedule by major category of loans  
Maturity schedule by major category of loans, Within One Year 6,954
Maturity schedule by major category of loans, After One Year Within Five Years 14,650
Maturity schedule by major category of loans, After Five Years 59,437
Commercial/Industrial [Member]
  
Maturity schedule by major category of loans  
Maturity schedule by major category of loans, Within One Year 64,640
Maturity schedule by major category of loans, After One Year Within Five Years 32,475
Maturity schedule by major category of loans, After Five Years 3,011
Agriculture [Member]
  
Maturity schedule by major category of loans  
Maturity schedule by major category of loans, Within One Year 36,501
Maturity schedule by major category of loans, After One Year Within Five Years 17,961
Maturity schedule by major category of loans, After Five Years 2,119
Consumer [Member]
  
Maturity schedule by major category of loans  
Maturity schedule by major category of loans, Within One Year 5,062
Maturity schedule by major category of loans, After One Year Within Five Years 13,891
Maturity schedule by major category of loans, After Five Years 2,099
Industrial Development Bonds [Member]
  
Maturity schedule by major category of loans  
Maturity schedule by major category of loans, Within One Year 442
Maturity schedule by major category of loans, After One Year Within Five Years 93
Maturity schedule by major category of loans, After Five Years $ 892