v3.26.1
FAIR VALUE DISCLOSURES - Schedule of Fair Value Inputs, Assets and Liabilities, Quantitative Information (Details)
$ in Thousands
Mar. 31, 2026
USD ($)
Dec. 31, 2025
USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
AFS investment securities $ 13,971,122 $ 13,580,285
Other Assets 4,867 4,897
ABS    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
AFS investment securities 44,586  
AgVantage    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
AFS investment securities 6,828,759 6,730,917
Interest-Only Farmer Mac Guaranteed Securities    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
AFS investment securities 8,153 8,203
Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Other Assets $ 4,867 $ 4,897
Level 3 | Discount rate | Discounted cash flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Other asset, measurement input 0.074 0.078
Level 3 | CPR | Discounted cash flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Other asset, measurement input 0.03 0.03
Level 3 | ABS    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
AFS investment securities $ 44,586  
Level 3 | ABS | Minimum | Discount rate | Discounted cash flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investment securities, measurement input 0.076  
Level 3 | ABS | Maximum | Discount rate | Discounted cash flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investment securities, measurement input 0.076  
Level 3 | ABS | Weighted Average | Discount rate | Discounted cash flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investment securities, measurement input 0.076  
Level 3 | AgVantage    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
AFS investment securities $ 6,828,759 $ 6,730,917
Level 3 | AgVantage | Minimum | Discount rate | Discounted cash flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investment securities, measurement input 0.045 0.043
Level 3 | AgVantage | Maximum | Discount rate | Discounted cash flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investment securities, measurement input 0.078 0.049
Level 3 | AgVantage | Weighted Average | Discount rate | Discounted cash flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investment securities, measurement input 0.047 0.045
Level 3 | Interest-Only Farmer Mac Guaranteed Securities    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
AFS investment securities $ 8,153 $ 8,203
Level 3 | Interest-Only Farmer Mac Guaranteed Securities | Discount rate | Discounted cash flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investment securities, measurement input 0.074 0.078
Level 3 | Interest-Only Farmer Mac Guaranteed Securities | CPR | Discounted cash flow    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investment securities, measurement input 0.03 0.03