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LOANS AND ASSET QUALITY - Current, past due, and non-accrual loans by categories of loans and restructured loans (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Dec. 31, 2015
--- | --- | --- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Current | $ 267,090 | $ 259,529 |  |
Past Due |  | 2,790 |  |
90 Days or More and Still Accruing | 71 | 36 |  |
Non-accrual | 3,866 | 3,751 | $ 2,357 | $ 3,706
Total | 272,446 | 266,106 |  |
30-89 Days Past Due |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past Due | 1,419 |  |  |
Commercial and Industrial |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Current | 3,989 | 4,679 |  |
Non-accrual | 48 |  |  |
Total | 4,045 | 4,679 |  |
Commercial and Industrial | 30-89 Days Past Due |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past Due | 8 |  |  |
Commercial Real Estate |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Current | 68,267 | 68,775 |  |
Non-accrual | 499 | 647 | 615 | 300
Total | 68,766 | 69,422 |  |
Consumer and indirect |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Current | 94,578 | 82,134 |  |
Past Due |  | 992 |  |
Non-accrual | 385 | 456 |  |
Total | 96,048 | 83,582 |  |
Consumer and indirect | 30-89 Days Past Due |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past Due | 1,085 |  |  |
Residential Real estate |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Current | 100,256 | 103,941 |  |
Past Due |  | 1,798 |  |
90 Days or More and Still Accruing | 71 | 36 |  |
Non-accrual | 2,934 | 2,648 | $ 1,335 | $ 2,575
Total | 103,587 | $ 108,423 |  |
Residential Real estate | 30-89 Days Past Due |  |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |  |
Past Due | $ 326 |  |  |

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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=84173941&loc=d3e5111-111524 + Details
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- Definition Financing receivables that are current. + 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=84173941&loc=SL6953401-111524 + Details
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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 (a) -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5111-111524 + Details
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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=82891408&loc=d3e4428-111522 + Details
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