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Loans and Allowance for Loan Losses, Modified Loans Payment Status (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Loans and Allowance for Loan Losses [Abstract]    
Deferral period of chapter 13 bankruptcies 60 months  
Number of days past due when loans are considered to be in payment default 90 days  
Contractual past due period for loans to be in payment default 30 days  
Troubled debt restructuring, default $ 0 $ 0