Consolidated Condensed Statements of Shareholders' Equity (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Tax effect on employee benefit funded status adjustment	$ 5	$ 5	$ 26	$ 5
Cash dividends (in dollars per share)	$ 0.27	$ 0.23	$ 0.72	$ 0.63
Issuance of treasury stock (in shares)		2	24	28
Common stock, par value (in dollars per share)	$ 1	$ 1	$ 1	$ 1
Maximum
Issuance of treasury stock (in shares)	1