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Financial Instruments with Off-Balance Sheet Risk (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Financial instruments, off-balance sheet credit risk [Abstract]    
Financial instruments, off-balance sheet credit risk $ 200,019 $ 136,093
Commitments to Extend Credit [Member]    
Financial instruments, off-balance sheet credit risk [Abstract]    
Financial instruments, off-balance sheet credit risk 197,460 135,015
Financial and Performance Standby Letters of Credit [Member]    
Financial instruments, off-balance sheet credit risk [Abstract]    
Financial instruments, off-balance sheet credit risk $ 2,559 $ 1,078