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Deposits - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Deposits [Abstract]      
Interest on time accounts $ 554 $ 595 $ 542
Held-to-maturity securities pledged as collateral 131,100    
Deposit overdrafts reclassified as loan balances 219 155  
Related party deposit liabilities $ 28,100 $ 39,600