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LOANS - Contractual Aging of Recorded Investment in Past Due Loans by Portfolio Segment of Loans (Detail) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2013 | Dec. 31, 2012
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
30-59 Days Past Due | $ 1,089 | $ 729
60-89 Days Past Due | 1,187 | 7
Greater Than 90 Days | 960 | 4,092
Total Past Due | 3,236 | 4,828
Current | 520,090 | 496,574
Total Financing Receivables | 523,326 | 501,402
Recorded Investment > 90 Days and Accruing |  | 1
Other real estate owned residential mortgages [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
30-59 Days Past Due | 847 | 575
60-89 Days Past Due | 106 |
Greater Than 90 Days | 339 | 648
Total Past Due | 1,292 | 1,223
Current | 77,976 | 79,064
Total Financing Receivables | 79,268 | 80,287
Recorded Investment > 90 Days and Accruing |  |
Agricultural Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
30-59 Days Past Due |  |
60-89 Days Past Due | 88 |
Greater Than 90 Days |  |
Total Past Due | 88 |
Current | 37,670 | 40,143
Total Financing Receivables | 37,758 | 40,143
Recorded Investment > 90 Days and Accruing |  |
Agricultural [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
30-59 Days Past Due |  | 11
60-89 Days Past Due |  |
Greater Than 90 Days |  |
Total Past Due |  | 11
Current | 56,752 | 57,759
Total Financing Receivables | 56,752 | 57,770
Recorded Investment > 90 Days and Accruing |  |
Commercial Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
30-59 Days Past Due |  |
60-89 Days Past Due | 975 |
Greater Than 90 Days | 571 | 877
Total Past Due | 1,546 | 877
Current | 230,558 | 199,122
Total Financing Receivables | 232,104 | 199,999
Recorded Investment > 90 Days and Accruing |  |
Commercial and Industrial [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
30-59 Days Past Due | 228 | 78
60-89 Days Past Due |  |
Greater Than 90 Days | 50 | 2,567
Total Past Due | 278 | 2,645
Current | 96,365 | 100,278
Total Financing Receivables | 96,643 | 102,923
Recorded Investment > 90 Days and Accruing |  |
Consumer [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
30-59 Days Past Due | 14 | 65
60-89 Days Past Due | 18 | 7
Greater Than 90 Days |  |
Total Past Due | 32 | 72
Current | 20,769 | 20,208
Total Financing Receivables | 20,801 | 20,280
Recorded Investment > 90 Days and Accruing |  | $ 1

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- Definition Financing receivables that are less than 60 days past due but more than 29 days past due. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953401-111524 + Details
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- Definition Financing receivables that are less than 90 days past due but more than 59 days past due. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953401-111524 + Details
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- Definition Recorded investment in financing receivables that are 90 days or more past due and still accruing. + 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=28368275&loc=d3e5111-111524 + Details
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- Definition Financing receivables that are equal to or greater than 90 days past due. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953401-111524 + Details
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- Definition Recorded Investment in financing receivables that are past due at 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 7A -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953401-111524 + Details
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