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LOANS AND ALLOWANCE FOR LOAN LOSSES, Troubled Debt Restructuring by Portfolio Segment (Details) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 USD ($) loan | Sep. 30, 2016 USD ($) loan | Sep. 30, 2017 USD ($) loan | Sep. 30, 2016 USD ($) loan
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of TDRs | loan | 3 | 6 | 5 | 6
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 429,000 | $ 1,344,000 | $ 895,000 | $ 1,344,000
Financing Receivable, Modifications, Post-Modification Recorded Investment | 448,000 | 1,652,000 | 914,000 | 1,652,000
Allowance Related to Troubled Debt Restructurings assigned during period | $ 29,000 | $ 0 | $ 44,000 | $ 0
Home Equity Loan [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of TDRs | loan |  |  | 1 | 0
Financing Receivable, Modifications, Pre-Modification Recorded Investment |  |  | $ 315,000 | $ 0
Financing Receivable, Modifications, Post-Modification Recorded Investment |  |  | 315,000 | 0
Allowance Related to Troubled Debt Restructurings assigned during period |  |  | $ 0 | $ 0
Residential Real Estate [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of TDRs | loan | 1 | 0 | 1 | 0
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 148,000 | $ 0 | $ 148,000 | $ 0
Financing Receivable, Modifications, Post-Modification Recorded Investment | 156,000 | 0 | 156,000 | 0
Allowance Related to Troubled Debt Restructurings assigned during period | $ 29,000 | $ 0 | $ 29,000 | $ 0
Residential Real Estate [Member] | Contractual Interest Rate Reduction [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of TDRs | loan | 1 | 0 | 1 | 0
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 134,000 | $ 0 | $ 134,000 | $ 0
Financing Receivable, Modifications, Post-Modification Recorded Investment | 145,000 | 0 | 145,000 | 0
Allowance Related to Troubled Debt Restructurings assigned during period | $ 0 | $ 0 | $ 0 | $ 0
Residential Real Estate [Member] | Extended Maturity [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of TDRs | loan | 1 | 0 | 2 | 0
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 147,000 | $ 0 | $ 298,000 | $ 0
Financing Receivable, Modifications, Post-Modification Recorded Investment | 147,000 | 0 | 298,000 | 0
Allowance Related to Troubled Debt Restructurings assigned during period | $ 0 | $ 0 | $ 15,000 | $ 0
Commercial | Extended Maturity [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of TDRs | loan | 0 | 6 | 0 | 6
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 0 | $ 1,344,000 | $ 0 | $ 1,344,000
Financing Receivable, Modifications, Post-Modification Recorded Investment | 0 | 1,652,000 | 0 | 1,652,000
Allowance Related to Troubled Debt Restructurings assigned during period | $ 0 | $ 0 | $ 0 | $ 0

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