CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Sep. 30, 2023	Sep. 30, 2022
Common Stock Class A Non-Voting
Stockholders’ equity:
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	51,869,569	53,454,885
Common stock, shares outstanding (in shares)	51,869,569	53,454,885
Common Stock Class B Voting
Stockholders’ equity:
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	3,000,000	3,000,000
Common stock, shares issued (in shares)	2,970,171	2,970,171
Common stock, shares outstanding (in shares)	2,970,171	2,970,171