v3.26.3
Loans and Allowance for Credit Losses on Loans - Age Analysis (Details) - USD ($)
 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total $ 24,082,990,000   $ 24,040,202,000
Non-accrual 122,337,000    
Non-accrual With No Allowance 31,824,000    
Non-accrual loans earning interest income on cash basis 676,000   470,000
Interest income on non-accrual loans 175,000 $ 630,000  
Interest Income Reversed 6,200,000 $ 1,500,000  
Commercial      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 13,428,328,000   12,163,545,000
Non-accrual 82,845,000    
Non-accrual With No Allowance 13,324,000    
Mortgage finance      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 5,441,689,000   6,064,019,000
Non-accrual 0    
Non-accrual With No Allowance 0    
Commercial real estate      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 4,786,513,000   5,378,712,000
Non-accrual 39,423,000    
Non-accrual With No Allowance 18,500,000    
Consumer      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 426,460,000   $ 433,926,000
Non-accrual 69,000    
Non-accrual With No Allowance 0    
30-59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 5,386,000    
30-59 Days Past Due | Commercial      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 1,576,000    
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 1,584,000    
30-59 Days Past Due | Consumer      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 2,226,000    
60-89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 23,003,000    
60-89 Days Past Due | Commercial      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 21,888,000    
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 1,115,000    
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 53,207,000    
90 Days or More Past Due | Commercial      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 52,807,000    
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 400,000    
Total Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 81,596,000    
Total Past Due | Commercial      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 76,271,000    
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 2,699,000    
Total Past Due | Consumer      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 2,626,000    
Current      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 23,879,057,000    
Current | Commercial      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 13,269,212,000    
Current | Mortgage finance      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 5,441,689,000    
Current | Commercial real estate      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 4,744,391,000    
Current | Consumer      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total $ 423,765,000