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Loans Loans (Troubled Debt Restructurings Type of Modification) (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
USD ($)
loan
Sep. 30, 2018
USD ($)
loan
Sep. 30, 2019
USD ($)
loan
Sep. 30, 2018
USD ($)
loan
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Number of loans modified as a troubled debt restructuring | loan 0 0 0 1
Troubled debt restructuring, pre-modification recorded investment $ 0 $ 0 $ 0 $ 608
Troubled debt restructuring, post-modification recorded investment $ 0 $ 0 $ 0 $ 608