FAIR VALUE - Fair Value Inputs and Valuation Techniques (Details)	Jun. 30, 2022 $ / loan	Dec. 31, 2021 $ / loan
IRLCs | Minimum | Pull-through rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative, measurement input	0.010	0.003
IRLCs | Maximum | Pull-through rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative, measurement input	0.999	0.993
IRLCs | Weighted Average | Pull-through rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative, measurement input	0.802	0.742
Servicing rights | Minimum | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing right, measurement input	0.046	0.045
Servicing rights | Minimum | Prepayment rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing right, measurement input	0.054	0.084
Servicing rights | Minimum | Cost to service (per loan)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing right, measurement input	63	70
Servicing rights | Maximum | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing right, measurement input	0.105	0.090
Servicing rights | Maximum | Prepayment rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing right, measurement input	0.149	0.187
Servicing rights | Maximum | Cost to service (per loan)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing right, measurement input	136	114
Servicing rights | Weighted Average | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing right, measurement input	0.062	0.058
Servicing rights | Weighted Average | Prepayment rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing right, measurement input	0.072	0.102
Servicing rights | Weighted Average | Cost to service (per loan)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Servicing right, measurement input	85	82