Loans, Collateral Dependent Loans and Loans With/Without Specific Valuation Allowance (Details) - Commercial [Member] $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2021 USD ($) Loan	Mar. 31, 2020 USD ($) Loan	Dec. 31, 2020 USD ($) Loan
Collateral Pledged [Member]
Total loans [Abstract]
Number of Loans | Loan	22	31	22
Recorded balance	$ 63,551	$ 54,702	$ 63,574
Specific Allowance	$ 750	$ 2,019	$ 450
Hotel/Motel [Member] | Collateral Pledged [Member]
Total loans [Abstract]
Number of Loans | Loan	6	3	5
Recorded balance	$ 34,174	$ 14,712	$ 26,194
Specific Allowance	$ 550	$ 250	$ 250
Commercial Real Estate Residential [Member] | Collateral Pledged [Member]
Total loans [Abstract]
Number of Loans | Loan	5	7	4
Recorded balance	$ 8,679	$ 5,125	$ 7,833
Specific Allowance	$ 0	$ 92	$ 0
Commercial Real Estate Nonresidential [Member] | Collateral Pledged [Member]
Total loans [Abstract]
Number of Loans | Loan	10	16	12
Recorded balance	$ 19,431	$ 25,296	$ 24,497
Specific Allowance	$ 200	$ 720	$ 200
Commercial Other [Member] | Collateral Pledged [Member]
Total loans [Abstract]
Number of Loans | Loan	1	5	1
Recorded balance	$ 1,267	$ 9,569	$ 5,050
Specific Allowance	$ 0	957	0
Commercial Other [Member] | Collateral Pledged by Leasehold Mortgage [Member]
Total loans [Abstract]
Recorded balance		5,100	$ 5,100
Commercial Other [Member] | Collateral Pledged by Underground Coal Mining Equipment and Junior Real Estate Liens [Member]
Total loans [Abstract]
Recorded balance		4,100
Commercial Other [Member] | Collateralized by Commercial Real Estate and Liens on Furniture, Fixtures, and Equipment [Member]
Total loans [Abstract]
Recorded balance		$ 400