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LOANS - Risk Category of Loans by Portfolio Segment (Detail) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2013 | Dec. 31, 2012
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross | $ 501,232 | $ 501,535
Agricultural Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross | 35,746 | 40,143
Agricultural Real Estate [Member] | 1-2 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross | 3,258 | 2,719
Agricultural Real Estate [Member] | 3 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross | 12,953 | 15,111
Agricultural Real Estate [Member] | 4 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross | 18,625 | 21,481
Agricultural Real Estate [Member] | 5 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross | 786 | 794
Agricultural Real Estate [Member] | 6 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross | 36 | 38
Agricultural Real Estate [Member] | 7 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross | 88 |
Agricultural Real Estate [Member] | 8 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross |  |
Agricultural [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross | 55,331 | 57,770
Agricultural [Member] | 1-2 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross | 5,014 | 5,022
Agricultural [Member] | 3 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross | 21,695 | 23,525
Agricultural [Member] | 4 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross | 28,588 | 29,188
Agricultural [Member] | 5 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross | 34 | 35
Agricultural [Member] | 6 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross |  |
Agricultural [Member] | 7 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross |  |
Agricultural [Member] | 8 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross |  |
Commercial Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross | 215,246 | 199,999
Commercial Real Estate [Member] | 1-2 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross | 2,573 | 4,046
Commercial Real Estate [Member] | 3 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross | 53,936 | 42,467
Commercial Real Estate [Member] | 4 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross | 147,286 | 137,537
Commercial Real Estate [Member] | 5 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross | 5,283 | 8,984
Commercial Real Estate [Member] | 6 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross | 6,168 | 6,295
Commercial Real Estate [Member] | 7 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross |  | 670
Commercial Real Estate [Member] | 8 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross |  |
Commercial and Industrial [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross | 93,978 | 101,624
Commercial and Industrial [Member] | 1-2 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross | 605 | 750
Commercial and Industrial [Member] | 3 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross | 23,894 | 21,750
Commercial and Industrial [Member] | 4 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross | 63,047 | 71,228
Commercial and Industrial [Member] | 5 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross | 2,245 | 3,385
Commercial and Industrial [Member] | 6 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross | 1,517 | 2,202
Commercial and Industrial [Member] | 7 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross | 2,670 | 2,309
Commercial and Industrial [Member] | 8 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross |  |
Industrial Development Bonds [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross | 3,102 | 1,299
Industrial Development Bonds [Member] | 1-2 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross |  | 97
Industrial Development Bonds [Member] | 3 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross | 2,758 | 859
Industrial Development Bonds [Member] | 4 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross | 344 | 343
Industrial Development Bonds [Member] | 5 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross |  |
Industrial Development Bonds [Member] | 6 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross |  |
Industrial Development Bonds [Member] | 7 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross |  |
Industrial Development Bonds [Member] | 8 [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans - Gross |  |

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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522 + Details
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