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Business Segments (Schedule Of Segment Reporting Information, By Segment) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Segment Reporting Information [Line Items]      
Net interest income $ 4,838 $ 4,687  
Provision for loan losses 100 200 $ 1,612
Net interest income after provision for loan losses 4,738 4,487  
Noninterest income 881 1,008  
Noninterest expenses 4,517 4,190  
Income before income taxes 1,102 1,305  
Income tax expense 342 418  
Net income (loss) 760 887  
Total assets 578,433 524,611 $ 574,195
Community Banking [Member] | Operating Segments [Member]      
Segment Reporting Information [Line Items]      
Net interest income 4,838 4,687  
Provision for loan losses 100 200  
Net interest income after provision for loan losses 4,738 4,487  
Noninterest income 510 508  
Noninterest expenses 4,148 3,733  
Income before income taxes 1,100 1,262  
Income tax expense 341 403  
Net income (loss) 759 859  
Total assets 576,675 520,801  
Mortgage [Member] | Operating Segments [Member]      
Segment Reporting Information [Line Items]      
Noninterest income 371 500  
Noninterest expenses 369 457  
Income before income taxes 2 43  
Income tax expense 1 15  
Net income (loss) 1 28  
Total assets $ 1,758 $ 3,810