Loans Impaired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Recorded Investment:
With No Related Allowance	$ 2,410	$ 807
With a Related Allowance	290	294
Unpaid Principal Balance:
With No Related Allowance	2,413	806
With a Related Allowance	291	295
Average Recorded Balance:
With No Related Allowance	1,609	1,869	$ 2,537
With a Related Allowance	292	294	920
Interest Income Recognized:
With No Related Allowance	11	9	19
With a Related Allowance	0	0	0
Cash Basis Income:
With No Related Allowance	0	0	0
With a Related Allowance	0	0	0
Commercial
Recorded Investment:
With No Related Allowance	0	0
With a Related Allowance	46	34
Unpaid Principal Balance:
With No Related Allowance	0	0
With a Related Allowance	47	35
Average Recorded Balance:
With No Related Allowance	0	215	215
With a Related Allowance	40	17	243
Interest Income Recognized:
With No Related Allowance	0	0	0
With a Related Allowance	0	0	0
Cash Basis Income:
With No Related Allowance	0	0	0
With a Related Allowance	0	0	0
Commercial Real Estate
Recorded Investment:
With No Related Allowance	1,124	0
With a Related Allowance	0	0
Unpaid Principal Balance:
With No Related Allowance	1,128	0
With a Related Allowance	0	0
Average Recorded Balance:
With No Related Allowance	562	397	787
With a Related Allowance	0	0	363
Interest Income Recognized:
With No Related Allowance	0	0	0
With a Related Allowance	0	0	0
Cash Basis Income:
With No Related Allowance	0	0	0
With a Related Allowance	0	0	0
Other Consumer
Recorded Investment:
With No Related Allowance	112	108
With a Related Allowance	0	0
Unpaid Principal Balance:
With No Related Allowance	111	107
With a Related Allowance	0	0
Average Recorded Balance:
With No Related Allowance	110	105	98
With a Related Allowance	0	0	0
Interest Income Recognized:
With No Related Allowance	1	1	1
With a Related Allowance	0	0	0
Cash Basis Income:
With No Related Allowance	0	0	0
With a Related Allowance	0	0	0
Residential Portfolio Segment
Recorded Investment:
With No Related Allowance	1,174	699
With a Related Allowance	244	260
Unpaid Principal Balance:
With No Related Allowance	1,174	699
With a Related Allowance	244	260
Average Recorded Balance:
With No Related Allowance	937	1,152	1,437
With a Related Allowance	252	277	314
Interest Income Recognized:
With No Related Allowance	10	8	18
With a Related Allowance	0	0	0
Cash Basis Income:
With No Related Allowance	0	0	0
With a Related Allowance	$ 0	$ 0	$ 0

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