Consolidated Statements of Income - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Interest income:
Interest and fees on loans	$ 12,945,000	$ 11,135,000	$ 12,592,000
Interest and dividends on securities:
U. S. Treasuries	6,560,000	3,173,000	663,000
U.S. Government agencies			95,000
Mortgage-backed securities	3,621,000	2,586,000	2,076,000
Collateralized mortgage obligations	3,495,000	1,919,000	860,000
States and political subdivisions	4,278,000	4,460,000	3,903,000
Other investments	122,000	27,000	8,000
Interest on balances due from depository institutions	1,608,000	408,000	95,000
Total interest income	32,629,000	23,708,000	20,292,000
Interest expense:
Deposits	5,746,000	1,985,000	806,000
Borrowings from Federal Home Loan Bank	409,000	173,000	24,000
Total interest expense	6,155,000	2,158,000	830,000
Net interest income	26,474,000	21,550,000	19,462,000
Provision for (reduction of) allowance for credit losses	(272,000)	80,000	(5,663,000)
Net interest income after provision for (reduction of) allowance for credit losses	26,746,000	21,470,000	25,125,000
Non-interest income:
(Loss) gain on liquidation, sales and calls of securities			(45,000)
Increase in cash surrender value of life insurance	485,000	445,000	435,000
Gain on sale of buildings	30,000	(0)	(0)
Other income	597,000	771,000	586,000
Total non-interest income	6,894,000	6,895,000	6,470,000
Non-interest expense:
Salaries and employee benefits	11,144,000	11,341,000	10,614,000
Net occupancy	2,087,000	1,755,000	1,918,000
Equipment rentals, depreciation and maintenance	2,774,000	2,905,000	2,914,000
Other expense	6,348,000	5,854,000	7,176,000
Total non-interest expense	22,353,000	21,855,000	22,622,000
Income before income taxes	11,287,000	6,510,000	8,973,000
Income tax (benefit) expense	2,121,000	(2,431,000)	62,000
Net income	$ 9,166,000	$ 8,941,000	$ 8,911,000
Basic and diluted earnings per share (in dollars per share)	$ 1.96	$ 1.91	$ 1.84
Dividends declared per share (in dollars per share)	$ 0.53	$ 0.19	$ 0.16
Trust Department Income and Fees [Member]
Non-interest income:
Revenue from contract with customer	$ 2,352,000	$ 2,001,000	$ 1,849,000
Service Charges on Deposit Accounts [Member]
Non-interest income:
Revenue from contract with customer	$ 3,430,000	$ 3,678,000	$ 3,645,000