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Leases (Narrative) (Details)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2023
USD ($)
branchOffice
Sep. 30, 2022
USD ($)
Sep. 30, 2023
USD ($)
branchOffice
Dec. 31, 2022
USD ($)
Lessee, Lease, Description [Line Items]        
Weighted average remaining lease term 19 years 7 months 6 days   19 years 7 months 6 days  
Weighted average discount rate 3.16%   3.16%  
Total operating lease expense $ 800 $ 700 $ 2,300  
Operating right-of-use lease assets 17,604   17,604 $ 18,733
Operating lease liabilities $ 18,348   $ 18,348 $ 19,391
Minimum        
Lessee, Lease, Description [Line Items]        
Option extension period 5 years   5 years  
Maximum        
Lessee, Lease, Description [Line Items]        
Option extension period 10 years   10 years  
Land and Building        
Lessee, Lease, Description [Line Items]        
Number of branch locations | branchOffice 17   17  
Land        
Lessee, Lease, Description [Line Items]        
Number of branch locations | branchOffice 10   10