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INVESTMENT SECURITIES - Additional information (Details) | 12 Months Ended
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Dec. 31, 2021 USD ($) position | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
INVESTMENT SECURITIES |  |  |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax | $ 66,000 | $ 25,000 | $ (93,000)
Investment Securities: |  |  |
Proceeds from sales of investment securities - available for sale | 960,000 |  | 3,374,000
Gross investment gains | 84,000 |  | $ 118,000
Book value of securities available for sale and held to maturity | $ 122,574,000 | 111,694,000 |
Number of positions | position | 89 |  |
Equity securities | $ 526,000 | $ 443,000 |
Premium percentage on mortgage backed securities purchased | 101.00% |  |
Consolidated investment securities portfolio modified, years | 3 years 5 months 15 days |  |
Number of investment |  | 0 |
Realized gain on equity securities | $ 36,000 | $ 2,000 |
Unrealized gain on equity securities | $ 7,000 | $ 3,000 |
U.S. Agency |  |  |
Investment Securities: |  |  |
Available For Sale Securities Debt Maturities Weighted Average Maturity Term | 8 years 6 months |  |
Weighted Average Expected Maturity For Held To Maturity Securities | 8 years 4 months 24 days |  |
U.S. Agency mortgage-backed securities |  |  |
Investment Securities: |  |  |
Available For Sale Securities Debt Maturities Weighted Average Maturity Term | 5 years 3 months 14 days |  |
Weighted Average Expected Maturity For Held To Maturity Securities | 5 years 3 months 29 days |  |
Corporate bonds. |  |  |
Investment Securities: |  |  |
Available For Sale Securities Debt Maturities Weighted Average Maturity Term | 4 years 9 months 29 days |  |
Weighted Average Expected Maturity For Held To Maturity Securities | 4 years 2 months 8 days |  |
Municipal |  |  |
Investment Securities: |  |  |
Available For Sale Securities Debt Maturities Weighted Average Maturity Term | 4 years 7 months 17 days |  |
Weighted Average Expected Maturity For Held To Maturity Securities | 6 years 18 days |  |
Standard & Poor's, AAA Rating |  |  |
INVESTMENT SECURITIES |  |  |
Portfolio rated | 47.10% | 42.20% |
Securities rated below A |  |  |
INVESTMENT SECURITIES |  |  |
Portfolio rated | 14.70% | 15.20% |
Deferred Compensation, Share-based Payments | Assets Held With Rabbi Trust |  |  |
Investment Securities: |  |  |
Equity securities | $ 526,000 | $ 443,000 |

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