CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - shares	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Statement of Stockholders' Equity [Abstract]
Purchase of treasury stock (in shares)	1,363,785	380,109	173,576
Issuance of treasury stock (in shares)	223,033	53,377	12,125
Cancellation of treasury stock (in shares)	31,309	34,727	23,461
Contribution of treasury stock (in shares)			668,000