v3.26.1
Loans and Leases Held for Investment - Narrative (Details)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
loan
Jun. 30, 2025
USD ($)
Mar. 31, 2026
USD ($)
Dec. 31, 2025
USD ($)
Mar. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total $ 24,210,846 $ 24,245,893 $ 24,210,846 $ 24,245,893   $ 25,032,679    
HFI loans and leases experiencing financial difficulty 140,732 155,999 218,528 234,592        
ALLL increase 1,700              
Allowance for loan and lease losses 243,319 229,344 243,319 229,344 $ 241,600 245,612 $ 234,986 $ 239,360
Net charge-offs 160,281 44,222 174,093 58,296        
Provision for credit losses 162,000 38,580 171,800 48,280        
Term extension, interest rate reduction, and principal forgiveness                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
HFI loans and leases experiencing financial difficulty 14,398   58,558          
Term extension, payment delay, and interest rate reduction                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
HFI loans and leases experiencing financial difficulty       146        
Commercial                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total 9,112,431 7,753,257 9,112,431 7,753,257   8,977,206    
Allowance for loan and lease losses 74,268 73,330 74,268 73,330 86,815 86,087 75,988 67,833
Net charge-offs 14,183 6,305 14,613 13,784        
Provision for credit losses 1,636 3,647 2,794 19,281        
Commercial | Venture capital                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total 2,440,075   2,440,075     2,222,097    
HFI loans and leases experiencing financial difficulty $ 28,995   $ 28,995 7,395        
Commercial | Venture capital | Term extension, interest rate reduction, and principal forgiveness                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Term Extension 68 months   68 months          
Interest Rate Reduction 1.00%   1.00%          
Principal forgiveness $ 5,000   $ 5,000          
HFI loans and leases experiencing financial difficulty 14,398   14,398          
Commercial | Venture capital | Term extension, payment delay, and interest rate reduction                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
HFI loans and leases experiencing financial difficulty       0        
Commercial | Other commercial                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total 3,353,534   3,353,534     3,804,099    
HFI loans and leases experiencing financial difficulty 2,360 4,121 2,525 $ 4,930        
Commercial | Other commercial | Term extension, interest rate reduction, and principal forgiveness                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
HFI loans and leases experiencing financial difficulty 0   0          
Commercial | Other commercial | Term extension, payment delay, and interest rate reduction                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Term Extension       61 months        
Interest Rate Reduction       5.75%        
HFI loans and leases experiencing financial difficulty       $ 146        
Payment Delay       3 months        
Real estate mortgage                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total 13,276,580 13,807,808 13,276,580 $ 13,807,808   13,750,787    
Allowance for loan and lease losses 147,021 134,945 147,021 134,945 $ 131,514 137,401 $ 130,116 $ 145,754
Net charge-offs 77,743 15,782 82,315 21,259        
Provision for credit losses 93,250 20,611 91,935 10,450        
Real estate mortgage | Commercial                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total 4,037,229   4,037,229     4,314,637    
HFI loans and leases experiencing financial difficulty 5,727 14,360 $ 81,738 53,850        
Real estate mortgage | Commercial | Term extension, interest rate reduction, and principal forgiveness                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Term Extension     64 months          
Interest Rate Reduction     1.65%          
Principal forgiveness     $ 8,100          
HFI loans and leases experiencing financial difficulty 0   44,160          
Real estate mortgage | Commercial | Term extension, payment delay, and interest rate reduction                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
HFI loans and leases experiencing financial difficulty       0        
Real estate mortgage | Other residential                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total 3,793,876   $ 3,793,876     3,346,733    
HFI loans and leases experiencing financial difficulty       3,471        
Term extension and payment delays   $ 2,500            
Real estate mortgage | Other residential | Term extension, payment delay, and interest rate reduction                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
HFI loans and leases experiencing financial difficulty       $ 0        
Three largest loan relationships | Credit concentration | Nonaccrual loans                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Percentage of nonaccrual loans and leases     34.00%          
Current                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total 24,037,193   $ 24,037,193     24,831,721    
Current | Commercial                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total 9,090,622   9,090,622     8,974,976    
Current | Commercial | Venture capital                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total 2,440,075   2,440,075     2,222,097    
Current | Commercial | Other commercial                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total 3,337,616   3,337,616     3,803,011    
Current | Real estate mortgage                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total 13,129,465   13,129,465     13,581,261    
Current | Real estate mortgage | Commercial                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total 4,009,159   4,009,159     4,257,633    
Current | Real estate mortgage | Other residential                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total 3,686,470   3,686,470     3,269,634    
30 TO 89 Days Past Due                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total 91,196   91,196     108,303    
30 TO 89 Days Past Due | Commercial                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total 10,154   10,154     2,126    
30 TO 89 Days Past Due | Commercial | Venture capital                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total 0   0     0    
30 TO 89 Days Past Due | Commercial | Other commercial                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total 4,263   4,263     984    
30 TO 89 Days Past Due | Real estate mortgage                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total 79,492   79,492     77,704    
30 TO 89 Days Past Due | Real estate mortgage | Commercial                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total 10,249   10,249     10,498    
30 TO 89 Days Past Due | Real estate mortgage | Other residential                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total 69,243   69,243     34,319    
Nonaccrual                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total 203,712   $ 203,712     159,168    
Number of largest loan relationships | loan     3          
Nonaccrual | Commercial                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total 27,436   $ 27,436     3,135    
Nonaccrual | Commercial | Venture capital                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total 14,398   14,398     625    
Nonaccrual | Commercial | Other commercial                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total 13,038   13,038     2,510    
Nonaccrual | Real estate mortgage                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total 172,706   172,706     154,676    
Nonaccrual | Real estate mortgage | Commercial                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total 107,116   107,116     93,334    
Nonaccrual | Real estate mortgage | Other residential                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total 53,951   53,951     57,984    
Nonaccrual | Three largest loan relationships                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total 69,800   69,800          
Nonaccrual | 90 or More Days Past Due                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total 82,500   82,500     92,700    
Nonaccrual | Current                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total 102,800   102,800     51,200    
Nonaccrual | 30 TO 89 Days Past Due                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total $ 18,400   $ 18,400     $ 15,300