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Deposits - Additional Information (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Deposits [Abstract]    
Brokered deposits $ 800,000 $ 500,000
Overdrafts in demand deposit accounts reclassified to loans 3,000 4,000
Deposit    
Deposits 56,866,340 $ 43,758,606
Public sector    
Deposit    
Deposits $ 15,100,000