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Deferred Compensation (Schedule of Deferred Compensation Arrangement) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Deferred Compensation [Abstract]    
Deferred compensation contribution $ 0 $ 0
Elected Deferrals 319 133
Deferred compensation liability $ 614 $ 363