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Benefit Plans (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Benefit Plans [Abstract]    
Term of service completed before eligible for coverage   4 months
Employer Matching Contribution, Percent of Match 100.00%  
Maximum Annual Contributions Per Employee, Percent 4.00%  
Additional Employer Matching Contribution Percent Of Deferral Match From Eligible Compensation 50.00%  
Maximum Additional Annual Contributions Per Employee Deferral Percent 2.00%  
Employer Discretionary Contribution Percent 100.00%  
Maximum Discretionary Profit Sharing Percent Of Eligible Compensation 2.00%  
Related plan expense $ 869 $ 825
Defined Benefit Plan, Gain (Loss), Net Periodic Benefit Cost (Credit) $ 1,100