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COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands |  | 3 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jun. 15, 2018 | Jun. 30, 2018 | Sep. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017
Commitments to make loans | Fixed Rate |  |  |  |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |  |  |  |
Off-balance sheet contractual amounts of financial instruments |  |  | $ 14,516 |  | $ 16,019
Commitments to make loans | Variable Rate |  |  |  |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |  |  |  |
Off-balance sheet contractual amounts of financial instruments |  |  | 26,544 |  | 28,591
Unused lines of credit | Fixed Rate |  |  |  |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |  |  |  |
Off-balance sheet contractual amounts of financial instruments |  |  | 1,246 |  | 1,604
Unused lines of credit | Variable Rate |  |  |  |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |  |  |  |
Off-balance sheet contractual amounts of financial instruments |  |  | 202,355 |  | 200,353
Standby letters of credit | Fixed Rate |  |  |  |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |  |  |  |
Off-balance sheet contractual amounts of financial instruments |  |  | 0 |  | 0
Standby letters of credit | Variable Rate |  |  |  |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |  |  |  |
Off-balance sheet contractual amounts of financial instruments |  |  | $ 15,627 |  | $ 15,022
Fane v. Chemung Canal Trust Company |  |  |  |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |  |  |  |
Amount awarded to other party | $ 3,300 |  |  |  |
Legal reserve |  |  |  | $ 2,300 |
Legal fees |  | $ 1,000 |  |  |

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