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Securities - Narrative (Details)
 12 Months Ended
Dec. 31, 2023
USD ($)
security
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Jan. 01, 2023
USD ($)
Investments, Debt and Equity Securities [Abstract]        
Securities $ 714,300,000      
Securities available-for-sale, at fair value 570,092,000 $ 614,407,000    
Debt securities, unrealized loss 12,000,000      
Accumulated unrealized loss on AFS securities 62,200,000      
Securities held-to-maturity, at amortized cost 141,236,000 151,683,000    
Maturities, principal repayments, and calls 163,100,000      
Securities purchased 96,439,000 313,514,000 $ 389,493,000  
Securities sold 0 31,762,000 113,524,000  
Debt securities, held-to-maturity, sale 0      
Debt securities, held-to-maturity, purchase 0      
Available-for-sale, allowance for credit loss 0     $ 0
Held-to-maturity, allowance for credit loss 0     $ 0
Accrued interest receivables, available for sale and held to maturity securities $ 3,000,000 3,000,000    
Debt securities, available-for-sale, number of securities in unrealized loss positions | security 545      
Debt securities, held-to-maturity, number of securities in unrealized loss positions | security 545      
Securities in a loss position as a percent of total AFS securities (as a percent) 10.96%      
Securities in a loss position as a proportion of total HTM securities (as a percent) 10.96%      
Equity securities, at fair value $ 2,965,000 9,979,000    
Loss on equity securities 14,000 468,000 175,000  
Sale of equity securities 7,000,000 7,399,000 $ 0  
Securities pledged as collateral $ 230,900,000 $ 168,200,000