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JUNIOR SUBORDINATED DEFERRABLE INTEREST DEBENTURES - General Information (Details) - Floating Rate Junior Subordinated Deferrable Interest Debentures [Member] - Junior Subordinated Debt [Member] - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019
Debt Instrument [Line Items] |  |
Debt Instrument, Face Amount | $ 9,485,000 | $ 9,485,000
BFC Trust [Member] |  |
Debt Instrument [Line Items] |  |
Preferred Stock, Amount Authorized | 93,000 |
Preferred Stock, Liquidation Preference, Value | 1,000 |
Proceeds from Issuance of Preferred Stock and Preference Stock | 3,100,000 |
Debt Instrument, Face Amount | $ 3,093,000 | 3,093,000
BFC Trust [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Basis Spread on Variable Rate | 2.75% |
FULB Trust [Member] |  |
Debt Instrument [Line Items] |  |
Preferred Stock, Amount Authorized | $ 192,000 |
Floating Rate Capital Trust Pass-through Securities Issued | 6,200 |
Preferred Stock, Liquidation Preference, Value | $ 1,000 |
Proceeds from Issuance of Preferred Stock and Preference Stock | 6,200,000 |
Debt Instrument, Face Amount | $ 6,392,000 | $ 6,392,000
FULB Trust [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Basis Spread on Variable Rate | 2.50% |

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