Premises and Equipment - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Abstract]
Finance lease, operating cash flows	$ 159	$ 34
Finance lease, financing cash flows	93	98
Operating lease, operating cash flows	$ 2,742	$ 2,136