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Loans and the Allowance for Loan Losses, Acquired Loans (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2019
Dec. 31, 2018
Acquired Loans Included in Consolidated Balance Sheet [Abstract]    
Outstanding principal balance $ 25,188 $ 31,940
Carrying amount 24,854 31,497
Acquired Loans Accounted for Under FASB ASC 310-30 [Abstract]    
Outstanding principal balance 232 246
Carrying amount 83 $ 91
Acquired Loans Accounted for under FASB ASC 310-30 Changes in Accretable Yield [Roll Forward]    
Balance at beginning of period 12  
Accretion 5  
Balance at end of period $ 17