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Restructuring Charges (Narrative) (Details)
$ in Thousands
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Jul. 17, 2020
Branch
Oct. 31, 2020
Branch
Sep. 30, 2021
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2021
USD ($)
Sep. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
Restructuring Cost And Reserve [Line Items]              
Number of bank branch closure | Branch 6            
Percentage of branch network 10.00%            
Percentage of branch network impact 6.00%            
Number of additional branches planned to close | Branch   1          
Pre tax expense related branch closures             $ 1,700
Total costs result in future cash expenditures             800
Anticipates annual expense savings branch closures             2,700
Restructuring charges     $ 1,586 $ 1,586  
Other Assets [Member]              
Restructuring Cost And Reserve [Line Items]              
Reclassification of long-lived assets to held for sale     $ 4,700   $ 4,700   0
Employee Severance [Member]              
Restructuring Cost And Reserve [Line Items]              
Pre tax expense related branch closures             200
Lease Termination Costs [Member]              
Restructuring Cost And Reserve [Line Items]              
Pre tax expense related branch closures             500
Valuation Adjustments On Branch Facilities [Member]              
Restructuring Cost And Reserve [Line Items]              
Pre tax expense related branch closures             $ 1,000