BORROWINGS - Narrative (Details) $ in Thousands		3 Months Ended		9 Months Ended
	Jan. 01, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) fund	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
BORROWINGS
Borrowings from FHLB		$ 256,065		$ 256,065		$ 141,498
Number of unsecured federal funds lines of credit | fund				2
Subordinated Notes
BORROWINGS
Interest expenses		$ 700	$ 300	$ 2,000	$ 1,000
PPPLF
BORROWINGS
Interest bearing rate (as a percent)		35.00%		35.00%
Advances from Federal Home Loan Banks		$ 3,900		$ 3,900		5,400
PPPLF | Minimum
BORROWINGS
Debt term (in years)				2 years
PPPLF | Maximum
BORROWINGS
Debt term (in years)				5 years
Federal Funds Lines of Credit One
BORROWINGS
Maximum borrowing capacity		10,000		$ 10,000
Amount outstanding		0		0		0
Federal Funds Lines of Credit Two
BORROWINGS
Maximum borrowing capacity		19,000		19,000
Subordinated Notes 2026
BORROWINGS
Carrying Value	$ 6,600
Redemption percentage	100.00%
Bank Technology Fund
BORROWINGS
Par value of collateral amount		45,600		45,600
FHLB
BORROWINGS
Amount of collateral pledged		1,280,000		1,280,000		$ 1,260,000
Available balance		624,800		624,800
March 27, 2024
BORROWINGS
Borrowings from FHLB		$ 31,000		$ 31,000
Interest bearing rate (as a percent)		0.10%		0.10%