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Earnings (Loss) Per Share (Schedule of Anti-dilutive Securities Excluded From Computation of Earnings Per Share) (Details) - shares
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Earnings Per Share [Abstract]      
Anti-dilutive shares (in shares) 197,610 4,000 41,650