XML 112 R80.htm IDEA: XBRL DOCUMENT v3.20.4
Premises and Equipment, Net - Additional Information (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Property Plant And Equipment [Abstract]      
Depreciation Expense $ 3.8 $ 3.6 $ 3.0