Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUES OF ASSETS AND LIABILITIES - Significant Unobservable Level 3 Inputs (Details)

v3.23.3
FAIR VALUES OF ASSETS AND LIABILITIES - Significant Unobservable Level 3 Inputs (Details) - Discounted cash flow - Level 3 - Fair Value, Measurements, Recurring
Sep. 30, 2023
Dec. 31, 2022
Residential MBS | Minimum | Constant prepayment rate    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Servicing asset, measurement input 0.04 0.05
Residential MBS | Minimum | Spread over forward interest rate swap rates    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Servicing asset, measurement input 0.05 0.05
Residential MBS | Maximum | Constant prepayment rate    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Servicing asset, measurement input 0.33 0.40
Residential MBS | Maximum | Spread over forward interest rate swap rates    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Servicing asset, measurement input 0.13 0.13
Residential MBS | Weighted Average | Constant prepayment rate    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Servicing asset, measurement input 0.07 0.07
Residential MBS | Weighted Average | Spread over forward interest rate swap rates    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Servicing asset, measurement input 0.06 0.06
Corporate debt | Minimum | Discount rate    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Debt securities, available-for-sale, measurement input 0.05 0.05
Corporate debt | Minimum | Cumulative default    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Debt securities, available-for-sale, measurement input 0 0
Corporate debt | Minimum | Loss given default    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Debt securities, available-for-sale, measurement input 0.20 0.20
Corporate debt | Maximum | Discount rate    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Debt securities, available-for-sale, measurement input 0.06 0.05
Corporate debt | Maximum | Cumulative default    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Debt securities, available-for-sale, measurement input 0.64 0.64
Corporate debt | Maximum | Loss given default    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Debt securities, available-for-sale, measurement input 0.20 0.20
Corporate debt | Weighted Average | Discount rate    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Debt securities, available-for-sale, measurement input 0.06 0.05
Corporate debt | Weighted Average | Cumulative default    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Debt securities, available-for-sale, measurement input 0.07 0.07
Corporate debt | Weighted Average | Loss given default    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Debt securities, available-for-sale, measurement input 0.20 0.20