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Business Segments (Schedule Of Segment Reporting Information, By Segment) (Details) - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Segment Reporting Information [Line Items]      
Net interest income $ 6,136,000 $ 6,130,000  
Provision for loan losses 888,000 210,000 $ 523,000
Net interest income after provision for loan losses 5,248,000 5,920,000  
Noninterest income 2,186,000 1,219,000  
Noninterest expenses 6,197,000 5,599,000  
Income before income taxes 1,237,000 1,540,000  
Income tax expense 242,000 306,000  
Net income 995,000 1,234,000  
Total assets 746,055,000 684,388,000 $ 725,394,000
Community Banking [Member] | Operating Segments [Member]      
Segment Reporting Information [Line Items]      
Net interest income 6,136,000 6,130,000  
Provision for loan losses 888,000 210,000  
Net interest income after provision for loan losses 5,248,000 5,920,000  
Noninterest income 1,009,000 528,000  
Noninterest expenses 5,340,000 5,025,000  
Income before income taxes 917,000 1,423,000  
Income tax expense 175,000 281,000  
Net income 742,000 1,142,000  
Total assets 739,651,000 681,531,000  
Mortgage [Member] | Operating Segments [Member]      
Segment Reporting Information [Line Items]      
Noninterest income 1,177,000 691,000  
Noninterest expenses 857,000 574,000  
Income before income taxes 320,000 117,000  
Income tax expense 67,000 25,000  
Net income 253,000 92,000  
Total assets $ 6,404,000 $ 2,857,000