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Earnings Per Common Share (Narrative) (Details) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Anti-dilutive options 0 0 0 0
Minimum [Member]        
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Options expiration date     Feb. 22, 2022  
Maximum [Member]        
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Options expiration date     Sep. 19, 2022