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LOANS AND ALLOWANCE FOR LOAN LOSSES (Troubled Debt Restructurings) (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 USD ($) loan item | Mar. 31, 2020 item | Dec. 31, 2020 USD ($) loan
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Loans modified in troubled debt restructurings | $ 1,339 |  | $ 1,360
Number of TDR loans during the period | loan | 0 |  | 0
Specific reserves modified as TDRs | $ 44 |  | $ 53
Number of contracts financing receivable modifications | item | 0 | 0 |
COVID 19 - Impact |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Number of TDR loans during the period | loan | 30 |  |
Real estate | Commercial |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Loans modified in troubled debt restructurings | $ 356 |  | 361
Real estate | One to four family |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |
Loans modified in troubled debt restructurings | $ 982 |  | $ 999

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