CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - shares	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Statement of Stockholders' Equity [Abstract]
Purchase of treasury stock (in shares)	99,829	1,363,785	380,109
Issuance of treasury stock (in shares)	305,318	223,033	53,377
Cancellation of treasury stock (in shares)	34,327	31,309	34,727