v3.26.1
Loans and Leases Held for Investment - Allowance for Loan and Lease Losses and Reserve for Unfunded Loan Commitments (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Receivables [Abstract]        
Reserve for Unfunded Loan Commitments, Balance, beginning of period $ 34,921 $ 29,071    
Allowance for Credit Losses, Balance, beginning of period 280,533 268,431    
Reserve for Unfunded Loan Commitments, Charge-offs 0 0    
Allowance for Credit Losses, Charge-offs (16,097) (16,551)    
Reserve for Unfunded Loan Commitments, Recoveries 0 0    
Allowance for Credit Losses, Recoveries 2,285 2,477    
Reserve for Unfunded Loan Commitments, Net charge-offs 0 0    
Allowance For Credit Losses, Net charge-offs (13,812) (14,074)    
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) 9,800 9,700    
Provision for Loan, Leases and Unfunded Loan Commitments 9,800 10,200    
Reserve for Unfunded Commitments, Provision (negative provision) 0 500    
Reserve for Unfunded Loan Commitments, Balance, end of period 34,921 29,571    
Allowance for Credit Losses, Balance, end of period 276,521 264,557    
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 241,600 234,986 $ 245,612 $ 239,360
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (13,812) (14,074)    
Financing Receivable, Allowance for Receivable Charge-offs and Recoveries [Line Items]        
Allowance for Credit Losses, Recoveries 2,285 2,477    
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery 13,812 14,074    
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 241,600 234,986 245,612 239,360
Allowance for Credit Losses, Charge-offs 16,097 16,551    
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) 9,800 9,700    
Real Estate Mortgage        
Receivables [Abstract]        
Allowance for Credit Losses, Charge-offs (5,374) (5,789)    
Allowance for Credit Losses, Recoveries 802 311    
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) 1,315 (10,160)    
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 131,514 130,116 137,401 145,754
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (4,572) (5,478)    
Financing Receivable, Allowance for Receivable Charge-offs and Recoveries [Line Items]        
Allowance for Credit Losses, Recoveries 802 311    
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery 4,572 5,478    
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 131,514 130,116 137,401 145,754
Allowance for Credit Losses, Charge-offs 5,374 5,789    
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) 1,315 (10,160)    
Real Estate Construction and Land        
Receivables [Abstract]        
Allowance for Credit Losses, Charge-offs (8,077) 0    
Allowance for Credit Losses, Recoveries 0 0    
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) 9,623 3,184    
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 10,395 14,124 8,849 10,940
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (8,077) 0    
Financing Receivable, Allowance for Receivable Charge-offs and Recoveries [Line Items]        
Allowance for Credit Losses, Recoveries 0 0    
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery 8,077 0    
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 10,395 14,124 8,849 10,940
Allowance for Credit Losses, Charge-offs 8,077 0    
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) 9,623 3,184    
Commercial        
Receivables [Abstract]        
Allowance for Credit Losses, Charge-offs (1,737) (9,582)    
Allowance for Credit Losses, Recoveries 1,307 2,104    
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) 1,158 15,634    
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 86,815 75,989 86,087 67,833
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (430) (7,478)    
Financing Receivable, Allowance for Receivable Charge-offs and Recoveries [Line Items]        
Allowance for Credit Losses, Recoveries 1,307 2,104    
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery 430 7,478    
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 86,815 75,989 86,087 67,833
Allowance for Credit Losses, Charge-offs 1,737 9,582    
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) 1,158 15,634    
Consumer        
Receivables [Abstract]        
Allowance for Credit Losses, Charge-offs (909) (1,180)    
Allowance for Credit Losses, Recoveries 176 62    
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) 334 1,042    
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 12,876 14,757 13,275 14,833
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (733) (1,118)    
Financing Receivable, Allowance for Receivable Charge-offs and Recoveries [Line Items]        
Allowance for Credit Losses, Recoveries 176 62    
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery 733 1,118    
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 12,876 14,757 $ 13,275 $ 14,833
Allowance for Credit Losses, Charge-offs 909 1,180    
Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) $ 334 $ 1,042