Earnings Per Common Share (Weighted Average Number Of Shares Used In Computing Earnings Per Share) (Details) - shares |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2020 |
|
Earnings Per Share [Abstract] | ||||
Potentially dilutive securities outstanding | 0 | 0 | ||
Average number of common shares outstanding used to calculate basic and diluted earnings per share | 3,448,352 | 3,413,304 | 3,436,271 | 3,420,002 |