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FAIR VALUE OF FINANCIAL INSTRUMENTS (Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) | Mar. 31, 2021 | Dec. 31, 2020 | Mar. 31, 2020
--- | --- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair value | $ 484,761,000 | $ 271,169,000 |
Amount of transfers of assets measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2 | 0 |  | $ 0
Amount of transfers of assets measured on a recurring basis out of Level 2 of the fair value hierarchy into Level 1 | 0 |  | $ 0
Fair value assets measured at fair value on a non-recurring basis | 0 | 0 |
Fair Value, Measurements, Recurring [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair value liability | 0 |  |
Carrying Amount | Residential mortgage-backed securities | Fair Value, Measurements, Recurring [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair value | 366,770,000 | 194,688,000 |
Carrying Amount | Commercial mortgage-backed securities | Fair Value, Measurements, Recurring [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair value | 30,452,000 | 33,492,000 |
Carrying Amount | CRA mutual fund | Fair Value, Measurements, Recurring [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair value | 2,281,000 | 2,313,000 |
Carrying Amount | Asset-backed Securities | Fair Value, Measurements, Recurring [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair value | 4,973,000 |  |
Carrying Amount | U.S. Government agency securities | Fair Value, Measurements, Recurring [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair value | 66,423,000 | 37,916,000 |
Carrying Amount | Securities issued by states and political subdivisions in the U.S | Fair Value, Measurements, Recurring [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair value | 11,370,000 |  |
Fair Value, Inputs, Level 1 | CRA mutual fund | Fair Value, Measurements, Recurring [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair value | 2,281,000 | 2,313,000 |
Fair Value, Inputs, Level 2 | Residential mortgage-backed securities | Fair Value, Measurements, Recurring [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair value | 366,770,000 | 194,688,000 |
Fair Value, Inputs, Level 2 | Commercial mortgage-backed securities | Fair Value, Measurements, Recurring [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair value | 30,452,000 | 33,492,000 |
Fair Value, Inputs, Level 2 | CRA mutual fund | Fair Value, Measurements, Recurring [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair value | 0 | 0 |
Fair Value, Inputs, Level 2 | Asset-backed Securities | Fair Value, Measurements, Recurring [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair value | 4,973,000 |  |
Fair Value, Inputs, Level 2 | U.S. Government agency securities | Fair Value, Measurements, Recurring [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair value | 66,423,000 | 37,916,000 |
Fair Value, Inputs, Level 2 | Securities issued by states and political subdivisions in the U.S | Fair Value, Measurements, Recurring [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair value | 11,370,000 |  |
Interest Rate Cap | Carrying Amount | Fair Value, Measurements, Recurring [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair value | 2,962,000 | 770,000 |
Interest Rate Cap | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair value | $ 2,962,000 | $ 770,000 |

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