v3.25.2
Loans Held for Investment - Schedule of Modifications to Borrowers (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period $ 31.2 $ 69.6 $ 50.6 $ 97.9  
Financing Receivable, Modification to Total Financing Receivables, Excluding Accrued Interest, Percent 0.19% 0.38% 0.31% 0.54%  
Interest Receivable $ 105.7   $ 105.7   $ 116.8
Financing Receivable, Loan in Process 0.0   0.0   1.2
Financing Receivable, Modified in Period, Accrued Interest, Amount     0.3 $ 0.8  
Principal Forgiveness          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period 0.0 $ 0.0 0.0 0.0  
Extended Maturity [Member]          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period 31.1 46.5 48.1 68.9  
Extended Maturity and Interest Rate Reduction          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period 0.1 23.1 2.5 29.0  
Principal Forgiven          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period 0.0 0.0 0.0 0.0  
Agricultural          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period $ 5.1 $ 5.7 $ 5.2 $ 11.7  
Financing Receivable, Modification to Total Financing Receivables, Excluding Accrued Interest, Percent 0.80% 0.79% 0.82% 1.62%  
Financing Receivable, Loan in Process $ 6.4   $ 6.4   10.4
Financing Receivable, Modified, Weighted Average Term Increase from Modification 6 years 7 years 1 month 6 days 6 years 7 years  
Agricultural | Principal Forgiveness          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period $ 0.0 $ 0.0 $ 0.0 $ 0.0  
Agricultural | Extended Maturity [Member]          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period 5.1 5.7 5.2 11.7  
Agricultural | Extended Maturity and Interest Rate Reduction          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period 0.0 0.0 0.0 0.0  
Agricultural | Principal Forgiven          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period $ 0.0 $ 0.0 $ 0.0 $ 0.0  
Agricultural | Weighted-Average Months of Term Extension          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period, Term Extension, Weighted-Average Months 0 years 0 years 0 years 0 years  
Agricultural | Weighted-Average Interest Rate Reduction          
Financing Receivable, Modifications to Borrowers [Line Items]          
Combination Term Extension and Interest Rate Reduction Percent 0.00% 0.00% 0.00% 0.00%  
Agricultural          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period $ 8.9 $ 45.6 $ 12.1 $ 46.3  
Financing Receivable, Modification to Total Financing Receivables, Excluding Accrued Interest, Percent 1.64% 6.53% 2.23% 6.63%  
Financing Receivable, Loan in Process $ 10.4   $ 10.4   5.2
Financing Receivable, Modified, Weighted Average Term Increase from Modification 5 years 10 months 24 days 4 years 1 month 6 days 6 years 6 months 4 years 1 month 6 days  
Agricultural | Principal Forgiveness          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period $ 0.0 $ 0.0 $ 0.0 $ 0.0  
Agricultural | Extended Maturity [Member]          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period 8.9 22.8 10.7 23.5  
Agricultural | Extended Maturity and Interest Rate Reduction          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period 0.0 22.8 1.4 22.8  
Agricultural | Principal Forgiven          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period $ 0.0 $ 0.0 $ 0.0 $ 0.0  
Agricultural | Weighted-Average Months of Term Extension          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period, Term Extension, Weighted-Average Months 0 years 55 years 2 months 12 days 7 years 3 months 18 days 55 years 2 months 12 days  
Agricultural | Weighted-Average Interest Rate Reduction          
Financing Receivable, Modifications to Borrowers [Line Items]          
Combination Term Extension and Interest Rate Reduction Percent 0.00% 1.20% 1.00% 1.20%  
Other, including overdrafts          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Loan in Process $ 0.0   $ 0.0   0.0
Commercial          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period $ 13.2 $ 6.3 $ 15.0 $ 17.5  
Financing Receivable, Modification to Total Financing Receivables, Excluding Accrued Interest, Percent 0.15% 0.07% 0.17% 0.19%  
Financing Receivable, Loan in Process $ 5.4   $ 5.4   7.7
Financing Receivable, Modified, Weighted Average Term Increase from Modification 14 years 4 months 24 days 11 years 7 months 6 days 13 years 6 months 7 years 2 months 12 days  
Commercial | Principal Forgiveness          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period $ 0.0 $ 0.0 $ 0.0 $ 0.0  
Commercial | Extended Maturity [Member]          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period 13.2 6.3 14.2 17.5  
Commercial | Extended Maturity and Interest Rate Reduction          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period 0.0 0.0 0.8 0.0  
Commercial | Principal Forgiven          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period $ 0.0 $ 0.0 $ 0.0 $ 0.0  
Commercial | Weighted-Average Months of Term Extension          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period, Term Extension, Weighted-Average Months 0 years 0 years 13 years 3 months 18 days 0 years  
Commercial | Weighted-Average Interest Rate Reduction          
Financing Receivable, Modifications to Borrowers [Line Items]          
Combination Term Extension and Interest Rate Reduction Percent 0.00% 0.00% 0.90% 0.00%  
Total construction loans          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period     $ 11.5    
Financing Receivable, Modification to Total Financing Receivables, Excluding Accrued Interest, Percent     1.14%    
Financing Receivable, Loan in Process $ 9.6   $ 9.6   3.7
Financing Receivable, Modified, Weighted Average Term Increase from Modification     6 years 4 months 24 days    
Total construction loans | Principal Forgiveness          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period     $ 0.0    
Total construction loans | Extended Maturity [Member]          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period     11.5    
Total construction loans | Extended Maturity and Interest Rate Reduction          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period     0.0    
Total construction loans | Principal Forgiven          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period     $ 0.0    
Total construction loans | Weighted-Average Months of Term Extension          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period, Term Extension, Weighted-Average Months     0 years    
Total construction loans | Weighted-Average Interest Rate Reduction          
Financing Receivable, Modifications to Borrowers [Line Items]          
Combination Term Extension and Interest Rate Reduction Percent     0.00%    
Residential          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period   $ 0.3 $ 0.5 $ 0.4  
Financing Receivable, Modification to Total Financing Receivables, Excluding Accrued Interest, Percent   0.01% 0.02% 0.02%  
Financing Receivable, Loan in Process 3.3   $ 3.3   9.7
Financing Receivable, Modified, Weighted Average Term Increase from Modification   0 years 22 years 3 months 18 days 11 years  
Residential | Principal Forgiveness          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period   $ 0.0 $ 0.0 $ 0.0  
Residential | Extended Maturity [Member]          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period   0.0 0.3 0.1  
Residential | Extended Maturity and Interest Rate Reduction          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period   0.3 0.2 0.3  
Residential | Principal Forgiven          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period   $ 0.0 $ 0.0 $ 0.0  
Residential | Weighted-Average Months of Term Extension          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period, Term Extension, Weighted-Average Months   31 years 2 months 12 days 84 years 9 months 18 days 31 years 2 months 12 days  
Residential | Weighted-Average Interest Rate Reduction          
Financing Receivable, Modifications to Borrowers [Line Items]          
Combination Term Extension and Interest Rate Reduction Percent   3.40% 2.20% 3.40%  
Total real estate          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period $ 18.3 $ 12.3 $ 32.2 $ 29.6  
Financing Receivable, Modification to Total Financing Receivables, Excluding Accrued Interest, Percent 0.15% 0.09% 0.26% 0.22%  
Financing Receivable, Loan in Process $ 24.7   $ 24.7   31.5
Total real estate | Principal Forgiveness          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period 0.0 $ 0.0 0.0 $ 0.0  
Total real estate | Extended Maturity [Member]          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period 18.3 12.0 31.2 29.3  
Total real estate | Extended Maturity and Interest Rate Reduction          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period 0.0 0.3 1.0 0.3  
Total real estate | Principal Forgiven          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period 0.0 0.0 0.0 0.0  
Commercial          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period $ 4.0 $ 11.7 $ 6.3 $ 21.9  
Financing Receivable, Modification to Total Financing Receivables, Excluding Accrued Interest, Percent 0.16% 0.38% 0.25% 0.72%  
Financing Receivable, Loan in Process $ 7.6   $ 7.6   14.8
Financing Receivable, Modified, Weighted Average Term Increase from Modification 8 years 1 month 6 days 7 years 9 months 18 days 9 years 8 months 12 days 7 years 9 months 18 days  
Commercial | Principal Forgiveness          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period $ 0.0 $ 0.0 $ 0.0 $ 0.0  
Commercial | Extended Maturity [Member]          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period 3.9 11.7 6.2 16.0  
Commercial | Extended Maturity and Interest Rate Reduction          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period 0.1 0.0 0.1 5.9  
Commercial | Principal Forgiven          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period $ 0.0 $ 0.0 $ 0.0 $ 0.0  
Commercial | Weighted-Average Months of Term Extension          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period, Term Extension, Weighted-Average Months 23 years 7 months 6 days 0 years 22 years 4 months 24 days 5 years  
Commercial | Weighted-Average Interest Rate Reduction          
Financing Receivable, Modifications to Borrowers [Line Items]          
Combination Term Extension and Interest Rate Reduction Percent 0.20% 0.00% 0.50% 1.00%  
Indirect consumer          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Loan in Process $ 9.7   $ 9.7   11.7
Financing Receivable, Modified, Weighted Average Term Increase from Modification   4 years 6 months   4 years 10 months 24 days  
Indirect consumer | Principal Forgiven          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period   $ 0.0   $ 0.0  
Indirect consumer | Weighted-Average Months of Term Extension          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period, Term Extension, Weighted-Average Months   0 years   0 years  
Indirect consumer | Weighted-Average Interest Rate Reduction          
Financing Receivable, Modifications to Borrowers [Line Items]          
Combination Term Extension and Interest Rate Reduction Percent   0.00%   0.00%  
Credit Card Receivable [Member]          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Loan in Process 0.0   0.0   2.2
Total consumer loans          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period       $ 0.1  
Financing Receivable, Modification to Total Financing Receivables, Excluding Accrued Interest, Percent       0.01%  
Financing Receivable, Loan in Process 10.9   10.9   15.0
Total consumer loans | Principal Forgiveness          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period       $ 0.0  
Total consumer loans | Extended Maturity [Member]          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period       0.1  
Total consumer loans | Extended Maturity and Interest Rate Reduction          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period       0.0  
Total consumer loans | Principal Forgiven          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period   $ 0.0   0.0  
Consumer Loan          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period       $ 0.1  
Financing Receivable, Modification to Total Financing Receivables, Excluding Accrued Interest, Percent       0.07%  
Financing Receivable, Loan in Process $ 1.2   $ 1.2   $ 1.1
Financing Receivable, Modified, Weighted Average Term Increase from Modification   5 years   10 years 1 month 6 days  
Consumer Loan | Principal Forgiveness          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period       $ 0.0  
Consumer Loan | Extended Maturity [Member]          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period       0.1  
Consumer Loan | Extended Maturity and Interest Rate Reduction          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period       0.0  
Consumer Loan | Principal Forgiven          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period   $ 0.0   $ 0.0  
Consumer Loan | Weighted-Average Months of Term Extension          
Financing Receivable, Modifications to Borrowers [Line Items]          
Financing Receivable, Excluding Accrued Interest, Modified Period, Term Extension, Weighted-Average Months   0 years   0 years  
Consumer Loan | Weighted-Average Interest Rate Reduction          
Financing Receivable, Modifications to Borrowers [Line Items]          
Combination Term Extension and Interest Rate Reduction Percent   0.00%   0.00%