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Shareholders' Equity (Restricted Stock) (Narrative) (Details) - $ / shares
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Stockholders' Equity Note [Abstract]    
Restricted stock grants, number of shares 2,137,317 1,917,514
Restricted stock grants, weighted average grant date fair value $ 3.42 $ 3.81