Premises and Equipment - Right-of-use Asset and Lease Liability (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Operating lease asset	$ 822	$ 511
Net lease liability	$ 822	$ 511
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Premises and equipment, net	Premises and equipment, net
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other liabilities	Other liabilities