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Employee Benefit Plans (Narrative) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]      
Common stock, shares issued 4,740,657 4,339,436  
401(K) Defined Contribution Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Maximum contribution percentage of pretax annual compensation 19.00%    
Defined contribution benefit plan, company contribution $ 411,000 $ 373,000  
Supplemental Executive Retirement Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
SERP expense 477,000 471,000  
Cash surrender values of life insurance policies 18,785,000 $ 16,355,000  
Employee Stock Purchase Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined contribution benefit plan, company contribution $ 0    
Common stock, shares issued 0 0 0