CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) - Common Stock [Member] - $ / shares	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 09, 2015
Common Shares Class A Non-Voting [Member]
Common stock, par value (in dollars per share)	$ 1
Common stock, shares authorized (in shares)	15,000,000	15,000,000	15,000,000
Common Stock Shares Issued (in shares)	8,650,392	8,561,772	8,504,429
Shares available for purchase through retirement plans (in shares)	200,000
Shares authorized for issuance of grants under equity compensation plan (in shares)				331,500
Common Shares Class B Voting [Member]
Common stock, par value (in dollars per share)	$ 1
Common stock, shares authorized (in shares)	1,040,000	1,040,000	1,040,000
Common Stock Shares Issued (in shares)	882,000	882,000	882,000