Equity (Details)	6 Months Ended
	Mar. 31, 2023 voting_right shares
Class A Common Stock
Schedule Of Stockholders Equity [Line Items]
Voting rights for each share | voting_right	1
Treasury stock, shares, acquired (in shares)	5,267
Class A Common Stock | Restricted Stock | Equity Incentive Plan
Schedule Of Stockholders Equity [Line Items]
Forfeitures (in shares)	1,864
Issuance of stock grant awards (in shares)	180,798
Class B Common Stock
Schedule Of Stockholders Equity [Line Items]
Voting rights for each share | voting_right	10