FAIR VALUE OF FINANCIAL INSTRUMENTS (Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	$ 607,474	$ 271,169
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 securities | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	501,431	194,688
Carrying Amount | Commercial mortgage securities | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	18,256	33,492
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	2,289	2,313
Carrying Amount | Derivative assets - interest rate cap | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	2,086	770
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	4,733
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	67,231	37,916
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	11,517
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	2,289	2,313
Fair Value, Inputs, Level 2 | Residential mortgage securities | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	501,431	194,688
Fair Value, Inputs, Level 2 | Commercial mortgage securities | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	18,256	33,492
Fair Value, Inputs, Level 2 | Derivative assets - interest rate cap | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	2,086	770
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	4,733
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	67,231	$ 37,916
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	$ 11,517