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Other Real Estate Owned and Repossessions (Details)
 12 Months Ended
Dec. 31, 2020
USD ($)
property
Dec. 31, 2019
USD ($)
property
Dec. 31, 2018
USD ($)
Gain On Sale Of Branch Location   $ 115,000  
Number of real estate properties | property 7 6  
Foreclosure assets held for sale $ 1,223,000 $ 4,654,000  
Valuation write-downs on foreclosed assets 1,320,000 926,000 $ 3,897,000
Operating leases right of use asset 8,536,000 8,668,000  
Lease liability $ 8,661,000 $ 8,747,000  
Operating Lease, Liability, Statement of Financial Position [Extensible List] Lease liability Lease liability  
Former branch      
Foreclosure assets held for sale $ 80,000    
Valuation write-downs on foreclosed assets 286,000    
Residential Mortgage [Member]      
Mortgage Loans in Process of Foreclosure, Amount 602,000 $ 1,600,000  
Acquired Loans | Residential Mortgage [Member]      
Mortgage Loans in Process of Foreclosure, Amount $ 518,000 $ 1,400,000