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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Bank Owned Life Insurance (Details) - USD ($) | 12 Months Ended |  |
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Bank Owned Life Insurance [Abstract] |  |  |
Benefit in excess of the cash surrender value | 50.00% |  |
Obligation included in other liabilities | $ 687,000 | $ 684,000 |
Expenses associated with split dollar benefit | $ 3,000 | $ 36,000 | $ 69,000

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