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Investment Securities (Details 3) - USD ($)
Mar. 31, 2021
Dec. 31, 2020
Fair value less than 12 months $ 98,095,000 $ 83,160,000
Unrealized losses less than 12 months 1,577,000 167,000
Fair value more than 12 months 0 0
Unrealized losses more than 12 months 0 0
Fair value total 98,095,000 83,160,000
Unrealized losses total 1,577,000 167,000
U. S. Government treasuries [Member]    
Fair value less than 12 months 29,421,000  
Unrealized losses less than 12 months 328,000  
Fair value more than 12 months 0  
Unrealized losses more than 12 months 0  
Fair value total 29,421,000  
Unrealized losses total 328,000  
Mortgage-backed obligations of federal agencies [Member]    
Fair value less than 12 months 45,108,000  
Unrealized losses less than 12 months 1,078,000  
Fair value more than 12 months 0  
Unrealized losses more than 12 months 0  
Fair value total 45,108,000  
Unrealized losses total 1,078,000  
Corporate debt security [Member]    
Fair value less than 12 months 1,473,000 9,389,000
Unrealized losses less than 12 months 27,000 14,000
Fair value more than 12 months 0 0
Unrealized losses more than 12 months 0 0
Fair value total 1,473,000 9,389,000
Unrealized losses total 27,000 14,000
Securities issued by States and political subdivisions in the U.S. [Member]    
Fair value less than 12 months 2,216,000  
Unrealized losses less than 12 months 328,000  
Fair value more than 12 months 0  
Unrealized losses more than 12 months 0  
Fair value total 2,216,000  
Unrealized losses total 29,000  
U. S. Government sponsored enterprises [Member]    
Fair value less than 12 months 19,877,000 73,771,000
Unrealized losses less than 12 months 115,000 153,000
Fair value more than 12 months 0 0
Unrealized losses more than 12 months 0 0
Fair value total 19,877,000 73,771,000
Unrealized losses total $ 115,000 $ 153,000