XML 79 R66.htm IDEA: XBRL DOCUMENT v3.21.2
Earnings Per Common Share - Additional Information (Details) - shares
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Earnings Per Share Basic [Abstract]      
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 97,724 0 10,500