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INVESTMENT SECURITIES - Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($) security	Sep. 30, 2022 USD ($) security	Sep. 30, 2023 USD ($) security	Sep. 30, 2022 USD ($) security	Dec. 31, 2022 USD ($)
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale, unrealized loss position, allowance for credit loss	$ 0		$ 0
Accumulated other than temporary impairment					$ 0
Investment securities sold | security	3	0	3
Investment securities	$ 495,162,000		$ 495,162,000		513,728,000
Number of investments securities, partially sold | security				1
Proceeds from sale of investment securities	19,900,000	$ 0	19,900,000	$ 3,075,000
Collateral Pledged
Debt Securities, Available-for-sale [Line Items]
Investment securities pledged to secure public funds, fair value	435,900,000		435,900,000		396,800,000
Equity Securities
Debt Securities, Available-for-sale [Line Items]
Gains (losses) on investments	2,000	(14,000)	(8,000)	8,000
Debt Securities
Debt Securities, Available-for-sale [Line Items]
Gains (losses) on investments				22,000
Investment securities		$ 3,100,000		3,100,000
Proceeds from sale of investment securities				3,100,000
Non-agency CMOs
Debt Securities, Available-for-sale [Line Items]
Gains (losses) on investments				$ 171,000
Investment securities	38,979,000		38,979,000		$ 39,758,000
US Treasury Securities
Debt Securities, Available-for-sale [Line Items]
Investment securities	$ 19,900,000		$ 19,900,000

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