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Loans and Allowance for Loan Losses - Purchased Credit Impaired Loans (Details) - Purchased Credit Impaired Loans [Member] - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]    
Total loans $ 40,785 $ 44,973
Less remaining purchase discount (11,637) (12,909)
Total loans, net of purchase discount 29,148 32,064
Less: Allowance for loan losses (376) (309)
Carrying amount, net of allowance 28,772 31,755
Commercial Real Estate [Member]    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]    
Total loans 21,221 23,787
Consumer Real Estate [Member]    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]    
Total loans 12,011 12,692
Construction and Land Development [Member]    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]    
Total loans 968 1,812
Commercial and Industrial [Member]    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]    
Total loans 6,463 6,521
Consumer and Other [Member]    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]    
Total loans $ 122 $ 161