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Condensed Consolidated Statements Of Shareholders' Equity (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended
Dec. 31, 2023
Sep. 30, 2023
Dec. 31, 2022
Sep. 30, 2022
Statement of Stockholders' Equity [Abstract]        
Tax effect included in net pension and postretirement benefit gains $ 23 $ 23 $ 30 $ 29
Common stock, dividends per share (in dollars per share) $ 0.90 $ 0.85 $ 0.85 $ 0.80