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Loans (Details 4) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
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Recorded investment in nonaccrual loans by portfolio segment of loans |  |
Investment in nonaccrual loans | $ 4,828 | $ 2,131
Consumer Real Estate [Member] |  |
Recorded investment in nonaccrual loans by portfolio segment of loans |  |
Investment in nonaccrual loans | 964 | 700
Agricultural Real Estate [Member] |  |
Recorded investment in nonaccrual loans by portfolio segment of loans |  |
Investment in nonaccrual loans |  |
Agricultural [Member] |  |
Recorded investment in nonaccrual loans by portfolio segment of loans |  |
Investment in nonaccrual loans |  | 7
Commercial Real Estate [Member] |  |
Recorded investment in nonaccrual loans by portfolio segment of loans |  |
Investment in nonaccrual loans | 877 | 1,003
Commercial [Member] |  |
Recorded investment in nonaccrual loans by portfolio segment of loans |  |
Investment in nonaccrual loans | 2,987 | 421
Consumer [Member] |  |
Recorded investment in nonaccrual loans by portfolio segment of loans |  |
Investment in nonaccrual loans |  |

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- Definition Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5111-111524 + Details
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