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Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Changes in the Allowance for Unfunded Commitments and Letters of Credit) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Allowance For Loan And Lease Losses And Unfunded Loan Commitments And Letters Of Credit        
Beginning balance $ 3,780 $ 4,330 $ 4,330 $ 3,130
Allowance for Loan and Lease Losses, Net Changes In Unfunded Commitments and Letters Of Credit Allowance 200 (650) (350) 550
Ending balance $ 3,980 $ 3,680 $ 3,980 $ 3,680