FAIR VALUE MEASUREMENTS - Unobservable Inputs Used and Valuation Techniques (Details) - Level 3	Dec. 31, 2025	Dec. 31, 2024
Minimum | Discounted Cash Flow | Constant prepayment rate | Mortgage Servicing Rights
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage servicing rights, measurement input	0.0551	0.0508
Minimum | Discounted Cash Flow | Option adjusted spread | Mortgage Servicing Rights
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage servicing rights, measurement input	3.98	3.98
Minimum | Internal Model | Pull through rate | Other contracts
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other derivative contracts, measurement input	0.0810	0.0509
Minimum | Internal Model | MSR value | Other contracts
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other derivative contracts, measurement input	0.2453	0.2391
Maximum | Discounted Cash Flow | Constant prepayment rate | Mortgage Servicing Rights
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage servicing rights, measurement input	0.1462	0.1632
Maximum | Discounted Cash Flow | Option adjusted spread | Mortgage Servicing Rights
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage servicing rights, measurement input	10.38	10.58
Maximum | Internal Model | Pull through rate | Other contracts
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other derivative contracts, measurement input	0.9988	0.9990
Maximum | Internal Model | MSR value | Other contracts
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other derivative contracts, measurement input	1.7700	1.7164
Weighted Average | Discounted Cash Flow | Constant prepayment rate | Mortgage Servicing Rights
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage servicing rights, measurement input	0.0700	0.0670
Weighted Average | Discounted Cash Flow | Option adjusted spread | Mortgage Servicing Rights
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage servicing rights, measurement input	5.88	6.32
Weighted Average | Internal Model | Pull through rate | Other contracts
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other derivative contracts, measurement input	0.8471	0.8306
Weighted Average | Internal Model | MSR value | Other contracts
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other derivative contracts, measurement input	1.3425	1.2123