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BORROWINGS (Schedule of Maturities of Long-term Debt) (Details) - USD ($) |  | 12 Months Ended |
--- | --- | --- | ---
Mar. 30, 2021 | Dec. 31, 2021 | Dec. 31, 2020
Debt Instrument [Line Items] |  |  |
FHLB fixed-rate advances maturing within one year of balance sheet date, Amount |  | $ 0 | $ 22,716,000
FHLB fixed-rate advances maturing within one year of balance sheet date, Rate |  | 0.00% | 2.10%
FHLB fixed-rate advances maturing from one to two years of balance sheet date, Amount |  | $ 11,000,000 | $ 11,000,000
FHLB fixed-rate advances maturing from one to two years from balance sheet date, Rate |  | 2.69% | 2.69%
FHLB fixed-rate advances maturing from two to three years from balance sheet date, Amount |  | $ 0 | $ 5,000,000
FHLB fixed-rate advances maturing from two to three years from balance sheet date, Rate |  | 0.00% | 2.60%
Long-term debt |  | $ 34,700,000 | $ 53,745,000
Long-term debt, Rate |  | 2.69% | 2.76%
Maximum borrowings from FHLB |  | $ 793,135,000 |
Available borrowings from FHLB |  | 762,885,000 |
Trust preferred subordinated debt |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt |  | $ 15,000,000 | $ 0
Effective rate, percentage |  | 4.00% | 0.00%
Contractual rate | 4.00% |  |
Trust preferred subordinated debt issued | $ 15,000,000 |  |
Debt Instrument, Issuance Price, Percentage | 100.00% |  |
Loan payable to local bank, 4.5% | Loan payable to local bank |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt |  | $ 0 | $ 1,329,000
Effective rate, percentage |  | 0.00% | 5.51%
Contractual rate |  | 4.50% |
Period of fixed interest rate |  | 5 years |
Loan payable variable rate, FCBI | Unsecured Debt |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt |  | $ 2,700,000 | $ 2,700,000
Effective rate, percentage |  | 3.32% | 3.22%
Contractual rate |  | 3.25% |
Trust Preferred Subordinated Debt, NWSB | Trust preferred subordinated debt |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt |  | $ 0 | $ 5,000,000
Effective rate, percentage |  | 0.00% | 6.39%
Contractual rate |  | 6.39% |
Trust preferred subordinated debt issued |  | $ 5,000,000 |
Trust Preferred Subordinated Debt, FCBI | Trust preferred subordinated debt |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt |  | $ 6,000,000 | $ 6,000,000
Effective rate, percentage |  | 0.00% | 1.69%
Trust preferred subordinated debt issued |  | $ 6,000,000 |
London Interbank Offered Rate (LIBOR) | Trust Preferred Subordinated Debt, FCBI | Trust preferred subordinated debt |  |  |
Debt Instrument [Line Items] |  |  |
Contractual rate |  | 1.83275% |
Basis spread on prime rate, percentage |  | 1.63% |

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