Leases (Narrative) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($) branch_office	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)
Lessee, Lease, Description [Line Items]
Weighted average remaining lease term	18 years 2 months 12 days
Weighted average discount rate	3.01%
Total operating lease expense	$ 700	$ 700
Operating right-of-use lease assets	16,899		$ 17,514
Lease liabilities	$ 17,354		$ 17,900
Minimum
Lessee, Lease, Description [Line Items]
Option extension period	5 years
Maximum
Lessee, Lease, Description [Line Items]
Option extension period	10 years
Land and Building
Lessee, Lease, Description [Line Items]
Number of branch locations | branch_office	7
Land
Lessee, Lease, Description [Line Items]
Number of branch locations | branch_office	8