INVESTMENT SECURITIES - Narrative (Details)	3 Months Ended		6 Months Ended	12 Months Ended
	Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)	Jun. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2022 fund	Dec. 31, 2023 USD ($)
Debt Securities, Available-for-sale [Line Items]
Debt securities pledged as collateral	$ 29,800,000			$ 31,100,000
Shareholder equity held by one issuer (as a percent)	10.00%		10.00%
Accrued interest receivable	$ 10,623,000			10,364,000
Proceeds from sale of debt securities	0	$ 0
Number of bank technology funds | fund					2
Bank Technology Fund
Debt Securities, Available-for-sale [Line Items]
Contractual obligation						$ 6,000,000
Return of capital, received	0
Balance with SBIC included in other assets	3,100,000			2,500,000
Committed investments to be made in the future	2,900,000
Bank Technology Fund | Other Assets
Debt Securities, Available-for-sale [Line Items]
Contribution to committed investments	600,000		$ 500,000
Return of capital, received			$ 300,000
Small Business Investment Company ("SBIC")
Debt Securities, Available-for-sale [Line Items]
Contractual obligation	600,000
Small Business Investment Company ("SBIC") | Other Assets
Debt Securities, Available-for-sale [Line Items]
Contribution to committed investments	0			200,000
Balance with SBIC included in other assets	2,400,000
Held-to-Maturity Securities
Debt Securities, Available-for-sale [Line Items]
Accrued interest receivable	$ 500,000			$ 300,000