XML 65 R54.htm IDEA: XBRL DOCUMENT v3.21.1
Earnings Per Common Share (Narrative) (Details) - shares
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Earnings Per Common Share (Textual)    
Antidilutive securities excluded from computation of earnings per share, amount 210,899 288,053