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LOANS AND ALLOWANCE FOR LOAN LOSSES - TROUBLED DEBT RESTRUCTURING (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2016 USD ($) Loan | Mar. 31, 2015 USD ($) Loan | Dec. 31, 2015 USD ($) Loan
Troubled Debt Restructurings [Abstract] |  |  |
Recorded investment in troubled debt restructurings | $ 11,200 |  | $ 12,000
Troubled debt restructuring reserve | 1,500 |  | 1,400
Troubled debt restructurings accruing interest under modified terms | 6,600 |  | 7,600
Troubled debt restructurings on non-accrual status | 4,600 |  | 4,400
Additional amounts committed to customers with loans classified as troubled debt restructurings | 100 |  | $ 100
Additional amounts of interest and past due escrow payments capitalized | $ 4 |  |
Loans by class modified as troubled debt restructurings [Abstract] |  |  |
Number of Loans | Loan | 1 | 1 |
Pre-Modification Outstanding Recorded Investment | $ 121 | $ 477 |
Post-Modification Outstanding Recorded Investment | 125 | 477 |
Number of Loans | Loan |  |  | 2
Recorded Investment |  |  | $ 2,145
Increase in allowance for loan losses related to troubled debt restructurings | $ (14) | $ (50) |
Commercial Mortgages Other [Member] |  |  |
Loans by class modified as troubled debt restructurings [Abstract] |  |  |
Number of Loans | Loan |  |  | 2
Recorded Investment |  |  | $ 2,145
Commercial and Agricultural [Member] | Commercial and Industrial [Member] |  |  |
Loans by class modified as troubled debt restructurings [Abstract] |  |  |
Number of Loans | Loan |  | 1 |
Pre-Modification Outstanding Recorded Investment |  | $ 477 |
Post-Modification Outstanding Recorded Investment |  | $ 477 |
Residential Mortgages [Member] |  |  |
Loans by class modified as troubled debt restructurings [Abstract] |  |  |
Number of Loans | Loan | 1 |  |
Pre-Modification Outstanding Recorded Investment | $ 121 |  |
Post-Modification Outstanding Recorded Investment | $ 125 |  |

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