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Investment Securities - Non-Marketable Securities Included in Other Assets (Details) - USD ($)
 6 Months Ended
Jul. 13, 2023
Jun. 30, 2023
Jun. 30, 2022
Jul. 27, 2023
Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]          
Federal home loan bank stock, par value (in usd per share)   $ 100      
Investments in low income housing tax credit funds   $ 2,300,000     $ 2,500,000
Low income housing tax credits and other tax benefits   300,000      
Low income housing amortization expense   252,000      
Unfunded commitments for low income housing tax credit funds   346,000      
Subsequent event          
Schedule of Equity Method Investments [Line Items]          
Federal home loan bank, dividend rate percentage       7.75%  
Visa Inc. Class B common stock | Subsequent event          
Schedule of Equity Method Investments [Line Items]          
Equity securities, FV-NI gain $ 2,800,000        
Low-income housing tax credit investment          
Schedule of Equity Method Investments [Line Items]          
Impairment losses   $ 0 $ 0    
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     10,439
Carrying value of securities carried at cost   $ 0     $ 0
Visa Inc. Class B common stock | Subsequent event          
Schedule of Equity Method Investments [Line Items]          
Carrying value of securities carried at cost 0        
Equity securities, FV-NI gain $ 2,800,000        
Asset Derivatives          
Schedule of Equity Method Investments [Line Items]          
Federal home loan bank stock   $ 16,700,000     $ 16,700,000