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FAIR VALUE MEASUREMENTS - Unobservable Inputs Used and Valuation Techniques (Details) - Level 3 | Sep. 30, 2025 | Dec. 31, 2024
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Minimum | Discounted Cash Flow | Constant prepayment rate | Mortgage servicing rights |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Mortgage servicing rights, measurement input | 0.0586 | 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 derivative contracts |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Other derivative contracts, measurement input | 0.0815 | 0.0509
Minimum | Internal Model | MSR value | Other derivative contracts |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Other derivative contracts, measurement input | 0.4230 | 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 | 0.1480 | 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 | 10.58 | 10.58
Maximum | Internal Model | Pull through rate | Other derivative contracts |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Other derivative contracts, measurement input | 0.9989 | 0.9990
Maximum | Internal Model | MSR value | Other derivative contracts |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Other derivative contracts, measurement input | 1.7100 | 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 | 0.0710 | 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 | 6.08 | 6.32
Weighted Average | Internal Model | Pull through rate | Other derivative contracts |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Other derivative contracts, measurement input | 0.8307 | 0.8306
Weighted Average | Internal Model | MSR value | Other derivative contracts |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Other derivative contracts, measurement input | 1.2476 | 1.2123

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