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Securities - Narrative (Details)
 3 Months Ended 12 Months Ended
Mar. 31, 2025
USD ($)
security
Mar. 31, 2024
USD ($)
Dec. 31, 2024
USD ($)
Investments, Debt and Equity Securities [Abstract]      
Securities $ 699,500,000    
Securities available-for-sale, at fair value (amortized cost of $625,524 and $613,393, respectively) 566,874,000   $ 550,148,000
Unrealized loss for debt securities 4,600,000    
Accumulated unrealized loss on AFS securities (58,700,000)    
Securities held-to-maturity, at amortized cost (fair value of $107,927 and $108,990, respectively) 129,686,000   131,796,000
Payments to acquire investments 36,800,000    
Maturities, principal repayments, and calls 26,800,000    
Securities sold 0    
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
Available-for-sale, number of securities in unrealized loss positions | security 479    
Securities in a loss position as a proportion of AFS securities (as a percent) 9.54%    
Proceeds from sale of debt securities $ 0 $ 0  
Equity securities, at fair value 2,981,000   2,937,000
Gain (Loss) on equity securities 44,000 $ (31,000) (28,000)
Securities pledged as collateral $ 237,000,000   $ 226,500,000