Loans, Financing Receivables by Credit Quality Indicator (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Risk Rating by Loan Class [Abstract]
Loans	$ 893,214	$ 780,645	$ 775,494
Pass [Member]
Risk Rating by Loan Class [Abstract]
Loans	846,139	744,249
Special Mention [Member]
Risk Rating by Loan Class [Abstract]
Loans	19,986	26,490
Substandard [Member]
Risk Rating by Loan Class [Abstract]
Loans	27,089	9,906
Doubtful [Member]
Risk Rating by Loan Class [Abstract]
Loans	0	0
Loss [Member]
Risk Rating by Loan Class [Abstract]
Loans	0	0
Commercial [Member]
Risk Rating by Loan Class [Abstract]
Loans	255,926	106,140	125,177
Commercial [Member] | Pass [Member]
Risk Rating by Loan Class [Abstract]
Loans	244,327	104,944
Commercial [Member] | Special Mention [Member]
Risk Rating by Loan Class [Abstract]
Loans	10,731	428
Commercial [Member] | Substandard [Member]
Risk Rating by Loan Class [Abstract]
Loans	868	768
Commercial [Member] | Doubtful [Member]
Risk Rating by Loan Class [Abstract]
Loans	0	0
Commercial [Member] | Loss [Member]
Risk Rating by Loan Class [Abstract]
Loans	0	0
Commercial Real Estate [Member]
Risk Rating by Loan Class [Abstract]
Loans	454,053	451,774	420,106
Commercial Real Estate [Member] | Pass [Member]
Risk Rating by Loan Class [Abstract]
Loans	431,381	427,991
Commercial Real Estate [Member] | Special Mention [Member]
Risk Rating by Loan Class [Abstract]
Loans	9,255	17,739
Commercial Real Estate [Member] | Substandard [Member]
Risk Rating by Loan Class [Abstract]
Loans	13,417	6,044
Commercial Real Estate [Member] | Doubtful [Member]
Risk Rating by Loan Class [Abstract]
Loans	0	0
Commercial Real Estate [Member] | Loss [Member]
Risk Rating by Loan Class [Abstract]
Loans	0	0
Agriculture [Member]
Risk Rating by Loan Class [Abstract]
Loans	95,048	115,751	123,626
Agriculture [Member] | Pass [Member]
Risk Rating by Loan Class [Abstract]
Loans	83,493	105,573
Agriculture [Member] | Special Mention [Member]
Risk Rating by Loan Class [Abstract]
Loans	0	7,823
Agriculture [Member] | Substandard [Member]
Risk Rating by Loan Class [Abstract]
Loans	11,555	2,355
Agriculture [Member] | Doubtful [Member]
Risk Rating by Loan Class [Abstract]
Loans	0	0
Agriculture [Member] | Loss [Member]
Risk Rating by Loan Class [Abstract]
Loans	0	0
Residential Mortgage [Member]
Risk Rating by Loan Class [Abstract]
Loans	64,497	64,943	51,064
Residential Mortgage [Member] | Pass [Member]
Risk Rating by Loan Class [Abstract]
Loans	64,018	64,596
Residential Mortgage [Member] | Special Mention [Member]
Risk Rating by Loan Class [Abstract]
Loans	0	0
Residential Mortgage [Member] | Substandard [Member]
Risk Rating by Loan Class [Abstract]
Loans	479	347
Residential Mortgage [Member] | Doubtful [Member]
Risk Rating by Loan Class [Abstract]
Loans	0	0
Residential Mortgage [Member] | Loss [Member]
Risk Rating by Loan Class [Abstract]
Loans	0	0
Residential Construction [Member]
Risk Rating by Loan Class [Abstract]
Loans	4,223	15,212	20,124
Residential Construction [Member] | Pass [Member]
Risk Rating by Loan Class [Abstract]
Loans	4,223	15,212
Residential Construction [Member] | Special Mention [Member]
Risk Rating by Loan Class [Abstract]
Loans	0	0
Residential Construction [Member] | Substandard [Member]
Risk Rating by Loan Class [Abstract]
Loans	0	0
Residential Construction [Member] | Doubtful [Member]
Risk Rating by Loan Class [Abstract]
Loans	0	0
Residential Construction [Member] | Loss [Member]
Risk Rating by Loan Class [Abstract]
Loans	0	0
Consumer [Member]
Risk Rating by Loan Class [Abstract]
Loans	19,467	26,825	$ 35,397
Consumer [Member] | Pass [Member]
Risk Rating by Loan Class [Abstract]
Loans	18,697	25,933
Consumer [Member] | Special Mention [Member]
Risk Rating by Loan Class [Abstract]
Loans	0	500
Consumer [Member] | Substandard [Member]
Risk Rating by Loan Class [Abstract]
Loans	770	392
Consumer [Member] | Doubtful [Member]
Risk Rating by Loan Class [Abstract]
Loans	0	0
Consumer [Member] | Loss [Member]
Risk Rating by Loan Class [Abstract]
Loans	$ 0	$ 0