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LOANS AND ALLOWANCE FOR LOAN LOSSES - Credit Quality Indicator (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Number of days past due after which a retail loan is rated | 90 days |  |  |
Loans | $ 1,315,582,000 | $ 1,203,482,000 |  |
Deteriorated Loans Transferred in [Abstract] |  |  |  |
Contractually required principal and interest, beginning of period | 1,940,000 | 2,912,000 | $ 3,621,000 |
Contractually required principal and interest, income accretion | 0 | 0 | 0 |
Contractually required principal and interest, all other adjustments | (988,000) | (972,000) | (709,000) |
Contractually required principal and interest, end of period | 952,000 | 1,940,000 | 2,912,000 |
Contractual cash flows not expected to be collected (nonaccretable discount), beginning of period | (352,000) | (506,000) | (570,000) |
Contractual cash flows not expected to be collected (nonaccretable discount), income accretion | 0 | 0 | 0 |
Contractual cash flows not expected to be collected (nonaccretable discount), all other adjustments | 286,000 | 154,000 | 64,000 |
Contractual cash flows not expected to be collected (nonaccretable discount), end of period | (66,000) | (352,000) | (506,000) |
Cash flows expected to be collected | 886,000 | 1,588,000 | 2,406,000 | $ 3,051,000
Cash flows expected to be collected, income accretion | 0 | 0 | 0 |
Cash flows expected to be collected, all other adjustments | (702,000) | (818,000) | (645,000) |
Interest component of expected cash flows (accretable yield), beginning of period | (170,000) | (311,000) | (420,000) |
Interest component of expected cash flows (accretable yield), income accretion | 61,000 | 112,000 | 174,000 |
Interest component of expected cash flows (accretable yield), all other adjustments | 15,000 | 29,000 | (65,000) |
Interest component of expected cash flows (accretable yield, end of period | (94,000) | (170,000) | (311,000) |
Recorded Investment in loans acquired with deteriorating credit quality | 792,000 | 1,418,000 | 2,095,000 | $ 2,631,000
Recorded Investment in loans acquired with deteriorating credit quality, income accretion | 61,000 | 112,000 | 174,000 |
Recorded Investment in loans acquired with deteriorating credit quality, all other adjustments | (687,000) | (789,000) | (710,000) |
Increase in allowance for loan losses for loans acquired | 55,000 | 15,000 | 5,000 |
Writedowns on OREO | 30,000 | 0 | $ 0 |
Not Rated |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 464,414,000 | 449,634,000 |  |
Pass |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 807,976,000 | 715,012,000 |  |
Special Mention |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 14,112,000 | 11,110,000 |  |
Substandard |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 25,489,000 | 24,848,000 |  |
Doubtful |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 2,799,000 | 1,460,000 |  |
Commercial, and Agricultural |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 199,576,000 | 177,027,000 |  |
Commercial mortgages: |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 646,174,000 | 570,156,000 |  |
Commercial mortgages: | Construction |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 45,688,000 | 46,510,000 |  |
Commercial mortgages: | Commercial mortgages |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 600,486,000 | 523,646,000 |  |
Commercial mortgages: | Not Rated | Construction |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Commercial mortgages: | Not Rated | Commercial mortgages |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Commercial mortgages: | Pass | Construction |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 45,553,000 | 45,055,000 |  |
Commercial mortgages: | Pass | Commercial mortgages |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 575,321,000 | 496,723,000 |  |
Commercial mortgages: | Special Mention | Construction |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 259,000 |  |
Commercial mortgages: | Special Mention | Commercial mortgages |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 9,665,000 | 8,574,000 |  |
Commercial mortgages: | Substandard | Construction |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 135,000 | 1,196,000 |  |
Commercial mortgages: | Substandard | Commercial mortgages |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 13,331,000 | 15,566,000 |  |
Commercial mortgages: | Doubtful | Construction |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Commercial mortgages: | Doubtful | Commercial mortgages |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 1,377,000 | 1,460,000 |  |
Residential Mortgages |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 194,937,000 | 198,965,000 |  |
Residential Mortgages | Not Rated |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 191,777,000 | 194,669,000 |  |
Residential Mortgages | Pass |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Residential Mortgages | Special Mention |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Residential Mortgages | Substandard |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 3,160,000 | 4,201,000 |  |
Residential Mortgages | Doubtful |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Consumer Loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 274,895,000 | 257,334,000 |  |
Consumer Loans | Credit cards |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 1,516,000 | 1,476,000 |  |
Consumer Loans | Home equity lines and loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 100,878,000 | 98,853,000 |  |
Consumer Loans | Indirect Consumer Loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 153,532,000 | 139,993,000 |  |
Consumer Loans | Direct consumer loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 18,969,000 | 17,012,000 |  |
Consumer Loans | Not Rated | Credit cards |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 1,516,000 | 1,476,000 |  |
Consumer Loans | Not Rated | Home equity lines and loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 99,568,000 | 97,183,000 |  |
Consumer Loans | Not Rated | Indirect Consumer Loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 152,598,000 | 139,339,000 |  |
Consumer Loans | Not Rated | Direct consumer loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 18,955,000 | 16,967,000 |  |
Consumer Loans | Pass | Credit cards |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Consumer Loans | Pass | Home equity lines and loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Consumer Loans | Pass | Indirect Consumer Loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Consumer Loans | Pass | Direct consumer loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Consumer Loans | Special Mention | Credit cards |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Consumer Loans | Special Mention | Home equity lines and loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Consumer Loans | Special Mention | Indirect Consumer Loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Consumer Loans | Special Mention | Direct consumer loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Consumer Loans | Substandard | Credit cards |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Consumer Loans | Substandard | Home equity lines and loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 1,310,000 | 1,670,000 |  |
Consumer Loans | Substandard | Indirect Consumer Loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 934,000 | 654,000 |  |
Consumer Loans | Substandard | Direct consumer loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 14,000 | 45,000 |  |
Consumer Loans | Doubtful | Credit cards |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Consumer Loans | Doubtful | Home equity lines and loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Consumer Loans | Doubtful | Indirect Consumer Loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Consumer Loans | Doubtful | Direct consumer loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Loans acquired with deteriorated credit quality |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 792,000 | 1,418,000 |  |
Loans acquired with deteriorated credit quality | Commercial, and Agricultural |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Loans acquired with deteriorated credit quality | Commercial mortgages: |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 792,000 | 1,323,000 |  |
Loans acquired with deteriorated credit quality | Commercial mortgages: | Construction |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Loans acquired with deteriorated credit quality | Commercial mortgages: | Commercial mortgages |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 792,000 | 1,323,000 |  |
Loans acquired with deteriorated credit quality | Residential Mortgages |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 95,000 |  |
Loans acquired with deteriorated credit quality | Consumer Loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Loans acquired with deteriorated credit quality | Consumer Loans | Credit cards |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Loans acquired with deteriorated credit quality | Consumer Loans | Home equity lines and loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Loans acquired with deteriorated credit quality | Consumer Loans | Indirect Consumer Loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Loans acquired with deteriorated credit quality | Consumer Loans | Direct consumer loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Commercial and industrial | Commercial, and Agricultural |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 199,030,000 | 176,666,000 |  |
Commercial and industrial | Commercial, and Agricultural | Not Rated |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Commercial and industrial | Commercial, and Agricultural | Pass |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 186,556,000 | 172,873,000 |  |
Commercial and industrial | Commercial, and Agricultural | Special Mention |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 4,447,000 | 2,277,000 |  |
Commercial and industrial | Commercial, and Agricultural | Substandard |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 6,605,000 | 1,516,000 |  |
Commercial and industrial | Commercial, and Agricultural | Doubtful |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 1,422,000 | 0 |  |
Commercial and industrial | Loans acquired with deteriorated credit quality | Commercial, and Agricultural |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Agricultural | Commercial, and Agricultural |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 546,000 | 361,000 |  |
Agricultural | Commercial, and Agricultural | Not Rated |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Agricultural | Commercial, and Agricultural | Pass |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 546,000 | 361,000 |  |
Agricultural | Commercial, and Agricultural | Special Mention |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Agricultural | Commercial, and Agricultural | Substandard |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Agricultural | Commercial, and Agricultural | Doubtful |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Agricultural | Loans acquired with deteriorated credit quality | Commercial, and Agricultural |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Performing | Residential Mortgages |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 191,777,000 | 194,764,000 |  |
Performing | Consumer Loans | Credit cards |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 1,516,000 | 1,476,000 |  |
Performing | Consumer Loans | Home equity lines and loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 99,568,000 | 97,183,000 |  |
Performing | Consumer Loans | Indirect Consumer Loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 152,598,000 | 139,339,000 |  |
Performing | Consumer Loans | Direct consumer loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 18,955,000 | 16,967,000 |  |
Non-Performing | Residential Mortgages |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 3,160,000 | 4,201,000 |  |
Non-Performing | Consumer Loans | Credit cards |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 0 | 0 |  |
Non-Performing | Consumer Loans | Home equity lines and loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 1,310,000 | 1,670,000 |  |
Non-Performing | Consumer Loans | Indirect Consumer Loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | 934,000 | 654,000 |  |
Non-Performing | Consumer Loans | Direct consumer loans |  |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |  |
Loans | $ 14,000 | $ 45,000 |  |

X
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- Definition Represents income accretion on certain loans acquired in transfer not accounted for as debt securities cash flows expected to be collected. + References No definition available. + Details
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- Definition Represents income accretion on certain loans acquired in transfer not accounted for as debt securities cash flows not expected to be collected. + References No definition available. + Details
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- Definition Represents income accretion on certain loans acquired in transfer not accounted for as debt securities contractually required payments receivable at fair value. + References No definition available. + Details
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- Definition The amount of the loan's contractually required payments receivable in excess of the amount of its cash flows expected to be collected. This relates to loans with deteriorating of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. + References No definition available. + Details
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- Definition Amount of accretion recognized for the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities, with evidence of deterioration of credit quality. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82894507&loc=d3e13503-111538 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544 + Details
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