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Fair Value Measurements - Additional Information (Details)
 12 Months Ended 24 Months Ended
Dec. 31, 2024
USD ($)
loan
Dec. 31, 2023
USD ($)
loan
Dec. 31, 2022
USD ($)
Dec. 31, 2024
USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Residential mortgage loans held for sale period 45 days      
Interest Rate Lock Commitments, Average Percentage Of Estimated Pull Through Rate To Calculate Fair Value 85      
Loans $ 7,751,143,000 $ 7,698,758,000   $ 7,751,143,000
Impairment on other real estate owned   249,000    
Impairment on fixed assets related to banking center consolidations 1,000,000 200,000 $ 0  
Net Book Balance Of Fixed Assets Sold   13,400,000    
Banking centers classified as held-for-sale 3 5   3
Fair value, non-recurring basis        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Nonrecurring Loans Reserves $ 6,400,000 $ 8,600,000   6,400,000
Number of Loans measured | loan 13 10    
Loans $ 27,000,000 $ 32,700,000   27,000,000
Mortgage servicing rights        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Impairment (recoveries) on mortgage servicing rights 0     $ 0
Other real estate owned        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Impairment on other real estate owned 0 200,000    
SBA servicing asset        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Impairment (recoveries) on mortgage servicing rights 0 $ 75,000    
Premise and equipment        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Impairment on fixed assets related to banking center consolidations $ 1,000,000      
Discount rate | Impaired loans | Minimum        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Measurement input (as a percent) 0.04     0.04
Discount rate | Impaired loans | Maximum        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Measurement input (as a percent) 0.32     0.32
Discount rate | Impaired loans | Weighted average        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Measurement input (as a percent) 0.118     0.118
Discount rate | Mortgage servicing rights | Minimum        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Servicing assets measurement input (as a percent) 0.10 0.10   0.10
Discount rate | Mortgage servicing rights | Maximum        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Servicing assets measurement input (as a percent) 0.105 0.105   0.105
Discount rate | Mortgage servicing rights | Weighted average        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Servicing assets measurement input (as a percent) 0.10 0.10   0.10
Discount rate | Other real estate owned | Minimum        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Measurement input (as a percent) 0.06     0.06
Discount rate | Other real estate owned | Maximum        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Measurement input (as a percent) 0.10     0.10
Discount rate | Other real estate owned | Weighted average        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Measurement input (as a percent) 0.086     0.086
Discount rate | SBA servicing asset        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Servicing assets measurement input (as a percent) 0.104 12.3   0.104
Constant prepayment speed | Mortgage servicing rights | Minimum        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Servicing assets measurement input (as a percent) 0.06 0.065   0.06
Constant prepayment speed | Mortgage servicing rights | Maximum        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Servicing assets measurement input (as a percent) 0.103 0.158   0.103
Constant prepayment speed | Mortgage servicing rights | Weighted average        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Servicing assets measurement input (as a percent) 0.06 0.07   0.06
Constant prepayment speed | SBA servicing asset        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Servicing assets measurement input (as a percent) 0.157 14.7   0.157