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Loans and Allowance - Subsequent Default (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2019
USD ($)
loan
Mar. 31, 2018
USD ($)
loan
Financing Receivable, Modifications [Line Items]    
Number of Loans | loan 1 4
Recorded Balance | $ $ 63 $ 432
Commercial and farmland    
Financing Receivable, Modifications [Line Items]    
Number of Loans | loan   1
Recorded Balance | $   $ 324
Residential    
Financing Receivable, Modifications [Line Items]    
Number of Loans | loan 1 3
Recorded Balance | $ $ 63 $ 108