FAIR VALUE MEASUREMENTS - Unobservable Inputs Used and Valuation Techniques (Details) - Level 3	Dec. 31, 2023	Dec. 31, 2022
Minimum | Discounted Cash Flow | Constant prepayment rate | Residential mortgages
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage servicing rights, measurement input	0.0670	0.0619
Minimum | Discounted Cash Flow | Option adjusted spread | Residential mortgages
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage servicing rights, measurement input	3.98
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
Minimum | Internal Model | Pull through rate | Other contracts
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other derivative contracts, measurement input	0.2490	0.2862
Minimum | Internal Model | MSR value | Other contracts
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other derivative contracts, measurement input	(0.0890)	(0.0160)
Maximum | Discounted Cash Flow | Constant prepayment rate | Residential mortgages
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage servicing rights, measurement input	0.1455	0.1780
Maximum | Discounted Cash Flow | Option adjusted spread | Residential mortgages
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage servicing rights, measurement input	10.58
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
Maximum | Internal Model | Pull through rate | Other contracts
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other derivative contracts, measurement input	0.9970	0.9990
Maximum | Internal Model | MSR value | Other contracts
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other derivative contracts, measurement input	1.4124	1.4484
Weighted Average | Discounted Cash Flow | Constant prepayment rate | Residential mortgages
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage servicing rights, measurement input	0.0723	0.0680
Weighted Average | Discounted Cash Flow | Option adjusted spread | Residential mortgages
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage servicing rights, measurement input	6.30
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		6.29
Weighted Average | Internal Model | Pull through rate | Other contracts
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other derivative contracts, measurement input	0.8034	0.8371
Weighted Average | Internal Model | MSR value | Other contracts
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other derivative contracts, measurement input	0.8804	0.9580