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Loans (Details 5) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
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Risk category of loans by portfolio segment |  |
Loans - Gross | $ 501,535 | $ 506,402
Agricultural Real Estate [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross | 40,143 | 31,993
Agricultural Real Estate [Member] | 1-2 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross | 2,719 | 1,058
Agricultural Real Estate [Member] | 3 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross | 15,111 | 12,613
Agricultural Real Estate [Member] | 4 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross | 21,481 | 17,256
Agricultural Real Estate [Member] | 5 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross | 794 | 383
Agricultural Real Estate [Member] | 6 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross | 38 | 683
Agricultural Real Estate [Member] | 7 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross |  |
Agricultural Real Estate [Member] | 8 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross |  |
Agricultural [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross | 57,770 | 52,598
Agricultural [Member] | 1-2 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross | 5,022 | 1,500
Agricultural [Member] | 3 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross | 23,525 | 25,019
Agricultural [Member] | 4 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross | 29,188 | 26,008
Agricultural [Member] | 5 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross | 35 | 57
Agricultural [Member] | 6 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross |  | 7
Agricultural [Member] | 7 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross |  | 7
Agricultural [Member] | 8 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross |  |
Commercial Real Estate [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross | 199,999 | 198,266
Commercial Real Estate [Member] | 1-2 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross | 4,046 | 3,545
Commercial Real Estate [Member] | 3 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross | 42,467 | 23,283
Commercial Real Estate [Member] | 4 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross | 137,537 | 159,959
Commercial Real Estate [Member] | 5 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross | 8,984 | 6,098
Commercial Real Estate [Member] | 6 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross | 6,295 | 4,677
Commercial Real Estate [Member] | 7 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross | 670 | 704
Commercial Real Estate [Member] | 8 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross |  |
Commercial [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross | 101,624 | 114,497
Commercial [Member] | 1-2 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross | 750 | 710
Commercial [Member] | 3 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross | 21,750 | 22,506
Commercial [Member] | 4 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross | 71,228 | 82,745
Commercial [Member] | 5 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross | 3,385 | 3,897
Commercial [Member] | 6 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross | 2,202 | 4,219
Commercial [Member] | 7 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross | 2,309 | 420
Commercial [Member] | 8 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross |  |
Industrial Development Bonds [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross | 1,299 | 1,196
Industrial Development Bonds [Member] | 1-2 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross | 97 | 188
Industrial Development Bonds [Member] | 3 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross | 859 | 622
Industrial Development Bonds [Member] | 4 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross | 343 | 386
Industrial Development Bonds [Member] | 5 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross |  |
Industrial Development Bonds [Member] | 6 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross |  |
Industrial Development Bonds [Member] | 7 [Member] |  |
Risk category of loans by portfolio segment |  |
Loans - Gross |  |
Industrial Development Bonds [Member] | 8 [Member] |  |
Risk category of loans by portfolio segment |  |
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=6375948&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 13 -Subparagraph e -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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