Premises and Equipment And Lease Commitments - Operating Lease (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Operating lease right of use asset, net	$ 7,831	$ 8,382
Operating lease liability	$ 8,088	$ 8,495
Weighted average remaining lease term	18 years 2 months 15 days	18 years 9 months 18 days
Weighted average discount rate	3.52%	3.50%
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term	8 months 12 days	0 years
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	24 years	25 years