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Deposits - Summary of Aggregate Amount of Time Deposits more than 100,000 (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Deposits [Abstract]      
Time deposit balances in denominations of more than $250,000 $ 98,277 $ 107,285 $ 87,517