FAIR VALUE MEASUREMENTS - Unobservable Inputs Used and Valuation Techniques (Details) - Level 3	Mar. 31, 2026	Dec. 31, 2025
Minimum | Discounted Cash Flow | Constant prepayment rate | Mortgage servicing rights
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage servicing rights, measurement input	0.05	0.06
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 derivative contracts
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other derivative contracts, measurement input	0.18	0.08
Minimum | Internal Model | MSR value | Other derivative contracts
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other derivative contracts, measurement input	0.34	0.25
Maximum | Discounted Cash Flow | Constant prepayment rate | Mortgage servicing rights
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage servicing rights, measurement input	0.15	0.15
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	10.38
Maximum | Internal Model | Pull through rate | Other derivative contracts
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other derivative contracts, measurement input	1	1
Maximum | Internal Model | MSR value | Other derivative contracts
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other derivative contracts, measurement input	1.81	1.77
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	0.07	0.07
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	5.74	5.88
Weighted Average | Internal Model | Pull through rate | Other derivative contracts
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other derivative contracts, measurement input	0.85	0.85
Weighted Average | Internal Model | MSR value | Other derivative contracts
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other derivative contracts, measurement input	1.36	1.34