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SECURITIES - Narrative (Details) - USD ($)	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Sep. 30, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	May 07, 2024	Apr. 08, 2024	Apr. 01, 2022
Information related to available for sale securities
Fair value of held-to-maturity securities transferred from available-for sale								$ 127,000,000
Unrealized loss of held-to-maturity securities transferred from available-for sale			$ 19,000,000.0					24,400,000
Unrealized loss of held-to-maturity securities transferred from available-for sale, net of tax			15,000,000.0					$ 19,300,000
Available-for-sale Securities pledged as collateral			560,200,000	$ 792,000,000.0
Debt securities, available-for-sale, allowance for credit loss			0	0
Accrued interest receivable on available-for-sale and held-to-maturity debt securities			$ 7,500,000	7,600,000
Securities backed by government or investment grade (as a percent)			99.00%
Equity investment							$ 0
Equity investment (in shares)						23,804
Realized gain on visa shares	$ 3,900,000	$ 5,100,000	$ 8,996,000	$ 0	$ 0

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