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INVESTMENT SECURITIES - Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($) security	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($) security	Dec. 31, 2023 USD ($)
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale, unrealized loss position, allowance for credit loss	$ 0		$ 0		$ 0
Gains (losses) on investments	181,000
Investment securities	826,828,000		826,828,000		513,519,000
Investment securities gain (loss)	0	$ 0	0	$ 0
Collateral Pledged
Debt Securities, Available-for-sale [Line Items]
Investment securities pledged to secure public funds, fair value	735,500,000		735,500,000		439,700,000
Equity Securities
Debt Securities, Available-for-sale [Line Items]
Gains (losses) on investments	271,000	2,000	254,000	(8,000)
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Investment securities	18,373,000	$ 19,900,000	18,373,000	$ 19,900,000	$ 17,840,000
Number of investment securities sold | security		3		3
Debt Securities
Debt Securities, Available-for-sale [Line Items]
Investment securities	$ 162,700,000		$ 162,700,000

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