INVESTMENT SECURITIES - Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale, unrealized loss position, allowance for credit loss	$ 0		$ 0
Investment securities (losses) gains	(2,000)	$ 13,000
Proceeds from sale of investment securities	0	0
Collateral Pledged
Debt Securities, Available-for-sale [Line Items]
Investment securities pledged to secure public funds, fair value	665,600,000		$ 556,500,000
Debt Securities
Debt Securities, Available-for-sale [Line Items]
Investment securities (losses) gains	$ (2,000)
Equity Securities
Debt Securities, Available-for-sale [Line Items]
Investment securities (losses) gains		$ 13,000