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Investment Securities - Non-Marketable Securities Included in Other Assets Narrative (Details) - USD ($)
 12 Months Ended
Jul. 13, 2023
Dec. 31, 2024
Dec. 31, 2023
Feb. 20, 2025
Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]          
Federal home loan bank stock, par value (in dollars per share)   $ 100      
Investments in low income housing tax credit funds   $ 1,600,000 $ 2,000,000.0    
Low income housing tax credits and other tax benefits   525,000      
Low income housing amortization expense   438,000      
Unfunded commitments for low income housing tax credit funds   338,000      
Impairment losses   $ 0 $ 0    
Investment, Proportional Amortization Method, Elected, Statement of Financial Position [Extensible Enumeration]     Payment for Acquisition, Real Estate, Held-for-Investment    
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Income or Comprehensive Income [Extensible Enumeration]   Payment for Acquisition, Real Estate, Held-for-Investment      
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Cash Flows [Extensible Enumeration]   Payment for Acquisition, Real Estate, Held-for-Investment      
Subsequent event          
Schedule of Equity Method Investments [Line Items]          
Federal home loan bank, dividend rate percentage       8.75%  
Visa Inc. Class B common stock          
Schedule of Equity Method Investments [Line Items]          
Equity securities, FV-NI gain $ 2,800,000        
Visa Inc. Class B common stock          
Schedule of Equity Method Investments [Line Items]          
Number of shares of securities carried at cost (in shares)         10,439
Carrying value of securities carried at cost   $ 0      
Other assets          
Schedule of Equity Method Investments [Line Items]          
Federal home loan bank stock   $ 16,700,000 $ 16,700,000