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Loans - Maturity Schedule by Major Category of Loans (Detail) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2014
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Commercial Real Estate [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Maturity schedule by major category of loans, Within One Year | $ 46,874
Maturity schedule by major category of loans, After One Year Within Five Years | 98,903
Maturity schedule by major category of loans, After Five Years | 115,857
Agricultural Real Estate [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Maturity schedule by major category of loans, Within One Year | 2,986
Maturity schedule by major category of loans, After One Year Within Five Years | 15,099
Maturity schedule by major category of loans, After Five Years | 31,544
Consumer Real Estate [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Maturity schedule by major category of loans, Within One Year | 9,786
Maturity schedule by major category of loans, After One Year Within Five Years | 16,834
Maturity schedule by major category of loans, After Five Years | 64,748
Commercial and Industrial [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Maturity schedule by major category of loans, Within One Year | 49,684
Maturity schedule by major category of loans, After One Year Within Five Years | 34,923
Maturity schedule by major category of loans, After Five Years | 5,417
Agricultural [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Maturity schedule by major category of loans, Within One Year | 40,408
Maturity schedule by major category of loans, After One Year Within Five Years | 20,987
Maturity schedule by major category of loans, After Five Years | 3,464
Consumer [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Maturity schedule by major category of loans, Within One Year | 5,316
Maturity schedule by major category of loans, After One Year Within Five Years | 12,318
Maturity schedule by major category of loans, After Five Years | 3,688
Industrial Development Bonds [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Maturity schedule by major category of loans, Within One Year | 1,933
Maturity schedule by major category of loans, After One Year Within Five Years | 542
Maturity schedule by major category of loans, After Five Years | $ 1,859

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