XML 101 R76.htm IDEA: XBRL DOCUMENT v3.21.2
Earnings Per Common Share - Additional Information (Details) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Earnings Per Share [Abstract]        
Antidilutive securities excluded from computation of earnings per share, amount 0 0 0 0