FAIR VALUE - Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($) security	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) security	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($) security
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value option, aggregate fair value was greater than (below) principal amount	$ 162,000		$ 162,000		$ 131,000
Increase (decrease) in fair value			40,043,000	$ 29,372,000
Increase (decrease) loans evaluated for credit loss	(929,000)	$ 5,100,000	(1,500,000)	4,700,000
Mortgage servicing rights	5,600,000		5,600,000		6,000,000.0
Mortgage servicing rights	3,400,000		3,400,000		3,500,000
Impairment reserve for mortgage servicing rights	0		0		$ 0
Impairment (reversal of) charges	0	50,000	0	50,000
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Sale of other real estate owned	$ 138,000	$ 0	138,000	$ 0
Interest rate lock commitments on residential mortgages
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Increase (decrease) in fair value			$ 5,000
Level 3 | Municipal bonds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Number of investment securities | security	1		1		1
Level 3 | Collateralized Mortgage Obligations
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Number of investment securities | security	2		2		2
Level 3 | Interest rate lock commitments on residential mortgages | Measurement Input, Pull Through
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Asset, measurement input (as a percent)	0.92		0.92
Level 3 | Interest rate lock commitments on residential mortgages | Measurement Input, Pull Through Increase (Decrease)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Asset, measurement input (as a percent)	0.05		0.05