Loans, Collateral Dependent Loans and Loans With/Without Specific Valuation Allowance (Details) - Commercial [Member] $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2022 USD ($) Loan	Mar. 31, 2021 USD ($) Loan	Dec. 31, 2021 USD ($) Loan
Collateral Pledged [Member]
Collateral Dependent Loans by Segment [Abstract]
Number of Loans | Loan	20	22	18
Recorded balance	$ 46,928	$ 63,551	$ 37,773
Specific Allowance	$ 500	$ 750	$ 1,150
Hotel/Motel [Member] | Collateral Pledged [Member]
Collateral Dependent Loans by Segment [Abstract]
Number of Loans | Loan	1	6	2
Recorded balance	$ 8,348	$ 34,174	$ 9,462
Specific Allowance	$ 0	$ 550	$ 600
Commercial Real Estate Residential [Member] | Collateral Pledged [Member]
Collateral Dependent Loans by Segment [Abstract]
Number of Loans | Loan	4	5	4
Recorded balance	$ 7,119	$ 8,679	$ 7,255
Specific Allowance	$ 0	$ 0	$ 0
Commercial Real Estate Nonresidential [Member] | Collateral Pledged [Member]
Collateral Dependent Loans by Segment [Abstract]
Number of Loans | Loan	11	10	11
Recorded balance	$ 19,827	$ 19,431	$ 19,943
Specific Allowance	$ 200	$ 200	$ 200
Commercial Other [Member] | Collateral Pledged [Member]
Collateral Dependent Loans by Segment [Abstract]
Number of Loans | Loan	4	1	1
Recorded balance	$ 11,634	$ 1,267	$ 1,113
Specific Allowance	$ 300	$ 0	$ 350
Commercial Other [Member] | Various Chattel, Including Surface Mining Equipment, Preparation Plant Equipment, and First Mortgage on a Preparation Plant, Real Estate, and Improvements [Member]
Collateral Dependent Loans by Segment [Abstract]
Number of financing receivables collateralized | Loan	1
Commercial Other [Member] | Accounts Receivable, Equipment, and Inventory [Member]
Collateral Dependent Loans by Segment [Abstract]
Number of financing receivables collateralized | Loan	3