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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Additional Information (Details) - USD ($)		3 Months Ended			9 Months Ended		12 Months Ended
	Jan. 01, 2021	Sep. 30, 2023	Jun. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
LOANS AND ALLOWANCE FOR CREDIT LOSSES
TDR loans evaluated on individual	$ 100,000
Interest income		$ 0		$ 0	$ 0	$ 0
Non-accrual loans for no related allowance for credit losses					1,700,000
Minimum loan balance required for collateral-dependent loans		100,000			100,000
Provision expense on its portfolio of outstanding loans		$ 0		2,000,000.0	1,500,000	2,000,000.0
Provision for loan losses				2,000,000	$ 1,500,000	2,000,000
Maximum percentage of concessions granted of their respective classes of loan portfolios		2.00%			2.00%
Loan modifications							$ 2,949,000
Troubled debt restructurings internal grading system substandard							1,700,000
Troubled debt restructurings returned to accrual status				66,000		578,000
Consumer
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loan modifications							252,000
Consumer | Principal forgiveness
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loan modification		$ 13,000			$ 52,000
Commercial real estate
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loan paid during period			$ 21,600,000
Loan modifications							$ 1,571,000
Family residential loan
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loan paid during period		143,000
Commercial business loan
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loan paid during period		16,000
Allowance for unfunded commitment
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Provision for loan losses		$ (1,200,000)		$ 1,300,000	$ (3,600,000)	$ 3,300,000

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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