CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Sep. 30, 2023	Sep. 30, 2022
Statement of Financial Position [Abstract]
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value per share (in dollars per share)	$ 1.00	$ 1.00
Common stock, shares authorized (in shares)	15,000,000	15,000,000
Common stock, shares issued (in shares)	8,416,145	8,416,145
Common stock, shares outstanding (in shares)	7,610,551	7,586,995
Treasury stock, shares (in shares)	806,341	829,150