BORROWINGS - Narrative (Details)		3 Months Ended		9 Months Ended
	Jul. 01, 2024 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) fund	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
BORROWINGS
Number of unsecured federal funds lines of credit | fund				2
Interest expenses		$ 600,000	$ 700,000	$ 2,000,000	$ 2,000,000
Line of Credit
BORROWINGS
Repayments of debt	$ 128,700,000
PPPLF
BORROWINGS
Interest bearing rate (as a percent)		35.00%		35.00%
Advances from Federal Home Loan Banks		$ 2,400,000		$ 2,400,000		$ 3,500,000
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		10,000,000		$ 10,000,000
Amount outstanding		0		0		0
Federal Funds Lines of Credit Two
BORROWINGS
Maximum borrowing capacity		19,000,000		19,000,000
Bank Technology Fund
BORROWINGS
Par value of collateral amount		10,300,000		10,300,000
FHLB
BORROWINGS
Amount of collateral pledged		1,300,000,000		1,300,000,000		$ 1,310,000,000
Borrowings from FHLB		612,100,000		612,100,000
March 27, 2024
BORROWINGS
Borrowings from FHLB		31,000,000		31,000,000
January 10, 2025
BORROWINGS
Borrowings from FHLB		$ 10,000,000.0		$ 10,000,000.0
Interest bearing rate (as a percent)		0.10%		0.10%
April 1, 2024
BORROWINGS
Borrowings from FHLB		$ 50,000,000		$ 50,000,000
April 1, 2024 | Secured Overnight Financing Rate (SOFR)
BORROWINGS
Interest bearing rate (as a percent)		0.15%		0.15%