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Investment Securities - Narrative (Details)
 3 Months Ended 12 Months Ended
Jun. 30, 2020
USD ($)
municipal_security
Dec. 31, 2022
USD ($)
security
state
Dec. 31, 2021
USD ($)
security
Sep. 30, 2014
USD ($)
Debt Securities, Available-for-sale [Line Items]        
Number of securities temporarily impaired (security) | security   869 163  
Number of securities temporarily impaired for 12 months or more (security) | security   300 27  
Period of temporary impairment   12 months 12 months  
Amortized cost of securities transferred       $ 89,780,000
Fair value of securities transferred       89,757,000
Net unrealized gains (losses) on securities transferred       $ (15,000)
Unamortized balance of net unrealized losses transferred   $ 64,000 $ 87,000  
Number of states | state   6    
Federal home loan bank stock   $ 2,846,000 4,328,000  
Federal reserve bank stock   1,037,000 1,037,000  
Impairment losses   0    
State and political subdivisions        
Debt Securities, Available-for-sale [Line Items]        
Number of securities temporarily impaired (security) | municipal_security 28      
Proceeds from sale of held-to-maturity securities $ 8,600,000      
Cumulative book value 8,332,000      
Net realized gain from sale of municipal securities $ 268,000      
Other equity securities        
Debt Securities, Available-for-sale [Line Items]        
Securities pledged as collateral   $ 350,411,000 $ 347,456,000