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Investment Securities - Narrative (Details)
6 Months Ended
Jun. 30, 2021
USD ($)
security
Jun. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
Investments, Debt and Equity Securities [Abstract]      
Proceeds from sales of investment securities available for sale $ 17,559,000 $ 15,314,000  
Gross realized gain on sale 209,000 355,000  
Gross realized loss on sale 72,000 $ 62,000  
Investment securities pledged as collateral $ 113,500,000   $ 126,500,000
Number of securities that have unrealized losses | security 94    
Securities deemed to be other than temporary $ 0