v3.25.3
Loans and Allowance for Credit Losses on Loans - Age Analysis (Details) - USD ($)
 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total $ 24,293,675,000   $ 22,542,823,000
Non-accrual 96,084,000    
Non-accrual With No Allowance 7,641,000    
Non-accrual loans earning interest income on cash basis 556,000   360,000
Interest income on non-accrual loans 630,000 $ 272,000  
Interest Income Reversed 1,500,000 $ 917,000  
Commercial      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 11,999,025,000   11,145,591,000
Non-accrual 71,966,000    
Non-accrual With No Allowance 3,073,000    
Mortgage finance      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 6,057,804,000   5,215,574,000
Non-accrual 0    
Non-accrual With No Allowance 0    
Commercial real estate      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 5,696,720,000   5,616,282,000
Non-accrual 24,118,000    
Non-accrual With No Allowance 4,568,000    
Consumer      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 540,126,000   $ 565,376,000
Non-accrual 0    
Non-accrual With No Allowance 0    
30-59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 5,498,000    
30-59 Days Past Due | Commercial      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 5,202,000    
30-59 Days Past Due | Mortgage finance      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 0    
30-59 Days Past Due | Commercial real estate      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 296,000    
30-59 Days Past Due | Consumer      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 0    
60-89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 3,436,000    
60-89 Days Past Due | Commercial      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 1,340,000    
60-89 Days Past Due | Mortgage finance      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 0    
60-89 Days Past Due | Commercial real estate      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 2,096,000    
60-89 Days Past Due | Consumer      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 0    
90 Days or More Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 126,000    
90 Days or More Past Due | Commercial      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 126,000    
90 Days or More Past Due | Mortgage finance      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 0    
90 Days or More Past Due | Commercial real estate      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 0    
90 Days or More Past Due | Consumer      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 0    
Total Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 9,060,000    
Total Past Due | Commercial      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 6,668,000    
Total Past Due | Mortgage finance      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 0    
Total Past Due | Commercial real estate      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 2,392,000    
Total Past Due | Consumer      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 0    
Current      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 24,188,531,000    
Current | Commercial      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 11,920,391,000    
Current | Mortgage finance      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 6,057,804,000    
Current | Commercial real estate      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 5,670,210,000    
Current | Consumer      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total $ 540,126,000