v3.26.1
Fair Value Measurements - Additional Information (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2026
USD ($)
Mar. 31, 2026
item
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
loan
Jun. 30, 2025
USD ($)
loan
Dec. 31, 2025
USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis            
Residential mortgage loans held for sale period       45 days    
Interest Rate Lock Commitments, Average Percentage Of Estimated Pull Through Rate To Calculate Fair Value       0.866    
Loans $ 9,774,052,000     $ 9,774,052,000   $ 7,433,356,000
Number of banking centers approved for consolidation | item   9        
Impairment on fixed assets related to banking center consolidations       800,000    
Premises and equipment held for sale 3,100,000     3,100,000    
Fair value, non-recurring basis            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis            
Nonrecurring Loans Reserves 14,200,000   $ 6,300,000 $ 14,200,000 $ 6,300,000  
Number of Loans measured | loan       23 15  
Loans 114,000,000   26,000,000 $ 114,000,000 $ 26,000,000  
Total liabilities at fair value 0   0 0 0  
Mortgage servicing rights            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis            
Impairment on mortgage servicing rights       0 0  
SBA servicing asset            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis            
Impairment on mortgage servicing rights       17,600 68,000  
Vista Bancshares, Inc | Fair value, non-recurring basis            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis            
Nonrecurring Loans Reserves 7,800,000     7,800,000    
MSRs            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis            
Impairment on mortgage servicing rights $ 0   $ 0 $ 0 $ 0  
Discount rate | Mortgage servicing rights | Minimum            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis            
Servicing assets measurement input (as a percent) 0.095     0.095    
Discount rate | Mortgage servicing rights | Maximum            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis            
Servicing assets measurement input (as a percent) 0.10     0.10    
Discount rate | SBA servicing asset | Weighted average            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis            
Servicing assets measurement input (as a percent) 0.10     0.10    
Discount rate | Impaired loans | Minimum            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis            
Measurement input (as a percent) 0.03     0.03    
Discount rate | Impaired loans | Maximum            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis            
Measurement input (as a percent) 0.31     0.31    
Discount rate | Impaired loans | Weighted average            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis            
Measurement input (as a percent) 0.076     0.076    
Discount rate | MSRs | Minimum            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis            
Servicing assets measurement input (as a percent) 0.095   0.10 0.095 0.10  
Discount rate | MSRs | Maximum            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis            
Servicing assets measurement input (as a percent) 0.10   0.105 0.10 0.105  
Constant prepayment speed | Mortgage servicing rights | Minimum            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis            
Servicing assets measurement input (as a percent) 0.062     0.062    
Constant prepayment speed | Mortgage servicing rights | Maximum            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis            
Servicing assets measurement input (as a percent) 0.097     0.097    
Constant prepayment speed | Mortgage servicing rights | Weighted average            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis            
Servicing assets measurement input (as a percent) 0.064     0.064    
Constant prepayment speed | SBA servicing asset | Weighted average            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis            
Servicing assets measurement input (as a percent) 0.162     0.162    
Constant prepayment speed | MSRs | Minimum            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis            
Servicing assets measurement input (as a percent) 0.062   0.06 0.062 0.06  
Constant prepayment speed | MSRs | Maximum            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis            
Servicing assets measurement input (as a percent) 0.097   0.128 0.097 0.128