FAIR VALUE DISCLOSURES OF FINANCIAL ASSETS AND LIABILITIES - Schedule of Fair Value Measurement Inputs and Valuation Techniques (Details) - Significant Unobservable Inputs (Level 3) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2025 USD ($) $ / shares	Dec. 31, 2024 USD ($) $ / shares
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other investments | $	$ 15,489	$ 15,516
Other real estate owned | $	439	5,204
Other assets | $	73	25
Risk participation agreements sold
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other liabilities, fair value | $	187	90
Financial derivatives related to sales of certain Visa Class B shares
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other liabilities, fair value | $	$ 5,155	$ 5,180
Measurement Input, Loss Given Default
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other assets, measurement input		0.30
Other liabilities, measurement input	0.30	0.30
Minimum | Measurement Input, CDS Spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other assets, measurement input	0.0110	0.0110
Other liabilities, measurement input	0.0160	0.0001
Minimum | Measurement Input, Loss Given Default
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other assets, measurement input		0
Maximum | Costs to sell
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other real estate owned, measurement input	0.100
Maximum | Measurement Input, CDS Spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other assets, measurement input	0.0360	0.0360
Other liabilities, measurement input	0.0350	0.0250
Maximum | Measurement Input, Loss Given Default
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other assets, measurement input	0.02
Weighted Average | Costs to sell
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other real estate owned, measurement input	0.100	0.100
Weighted Average | Measurement Input, CDS Spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other assets, measurement input	0.0288	0.0192
Other liabilities, measurement input	0.0198	0.0207
Weighted Average | Measurement Input, Loss Given Default
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other assets, measurement input		0.30
Weighted Average | Timing of Visa litigation resolution
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other liabilities, measurement input, term	1 year 9 months	2 years 6 months