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BORROWINGS (Schedule of Maturities of Long-term Debt) (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019
Debt Instrument [Line Items] |  |
FHLB fixed-rate advances maturing within one year of balance sheet date, Amount | $ 22,716,000 | $ 20,000,000
FHLB fixed-rate advances maturing within one year of balance sheet date, Rate | 2.10% | 1.87%
FHLB fixed-rate advances maturing from one to two years of balance sheet date, Amount | $ 11,000,000 | $ 22,716,000
FHLB fixed-rate advances maturing from one to two years from balance sheet date, Rate | 2.69% | 2.10%
FHLB fixed-rate advances maturing from two to three years from balance sheet date, Amount | $ 5,000,000 | $ 11,000,000
FHLB fixed-rate advances maturing from two to three years from balance sheet date, Rate | 2.60% | 2.69%
FHLB fixed-rate advances maturing from three to four years from balance sheet date, Amount |  | $ 5,000,000
FHLB fixed-rate advances maturing from three to four years from balance sheet date, Rate |  | 2.60%
Long-term debt | $ 53,745,000 | $ 66,296,000
Long-term debt, Rate | 2.76% | 2.58%
Maximum borrowings from FHLB | $ 847,881,000 |
Available borrowings from FHLB | 791,915,000 |
Loan payable to local bank, 4.5% | Loan payable to local bank |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 1,329,000 | $ 1,830,000
Effective rate, percentage | 5.51% | 4.50%
Contractual rate | 4.50% |
Period of fixed interest rate | 5 years |
Loan payable to local bank, 5.25% | Loan payable to local bank |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 0 | $ 750,000
Loan payable variable rate, FCBI | Unsecured Debt |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 2,700,000 | $ 0
Effective rate, percentage | 3.22% | 0.00%
Contractual rate | 3.25% |
Trust Preferred Subordinated Debt, NWSB | Trust preferred subordinated debt |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 5,000,000 | $ 5,000,000
Effective rate, percentage | 6.39% | 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 | $ 0
Effective rate, percentage | 1.69% | 0.00%
Trust preferred subordinated debt issued | $ 6,000,000 |
Wall Street Journal Prime Rate | Loan payable to local bank, 5.25% | Loan payable to local bank |  |
Debt Instrument [Line Items] |  |
Effective rate, percentage | 0.00% | 4.50%
Basis spread on prime rate, percentage | 0.25% |
London Interbank Offered Rate (LIBOR) | Trust Preferred Subordinated Debt, FCBI | Trust preferred subordinated debt |  |
Debt Instrument [Line Items] |  |
Contractual rate | 1.94338% |
Basis spread on prime rate, percentage | 1.63% |

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