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Investment Securities - Narrative (Details)
 3 Months Ended 9 Months Ended
Sep. 30, 2024
USD ($)
security
Sep. 30, 2024
USD ($)
security
Sep. 30, 2023
USD ($)
Jun. 30, 2024
USD ($)
Dec. 31, 2023
USD ($)
Jun. 30, 2023
USD ($)
Dec. 31, 2022
USD ($)
Debt Securities, Available-for-sale [Line Items]              
Available-for-sale securities, accrued interest receivable $ 2,100,000 $ 2,100,000     $ 2,400,000    
Held-to-maturity securities, accrued interest receivable $ 1,900,000 $ 1,900,000     $ 1,900,000    
Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Other assets Other assets     Other assets    
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Other assets Other assets     Other assets    
Proceeds from sales of investment securities, available-for-sale $ 7,900,000 $ 25,579,000 $ 0        
Gross realized losses on securities $ 454,000 $ 1,434,000          
Number of available for sale securities that have unrealized losses | security 243 243          
Number of held to maturity securities that have unrealized losses | security 146 146          
Allowance for credit loss $ 19,663,000 $ 19,663,000 $ 17,368,000 $ 18,806,000 $ 18,371,000 $ 17,066,000 $ 16,128,000
Investment Securities              
Debt Securities, Available-for-sale [Line Items]              
Allowance for credit loss 0 0          
Asset Pledged as Collateral              
Debt Securities, Available-for-sale [Line Items]              
Investment securities pledged as collateral $ 363,400,000 $ 363,400,000     $ 429,900,000