Equity-Based Compensation - Summary of Company's Restricted Stock Unit Activity (Details)	12 Months Ended
	Sep. 30, 2023 $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted Average Exercise Price, Outstanding at September 30, 2022	$ 19.07
Forfeited, weighted average exercise price	19.08
Weighted Average Exercise Price, Outstanding at September 30, 2023	$ 19.06
Restricted Stock Units (RSU) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Beginning balance, Outstanding | shares | shares	2,285,000
Granted | Shares | shares	2,485,000
Vested | Shares | shares	780,000
Forfeited | shares | shares	969,000
Ending balance, Outstanding | shares | shares	3,021,000
Weighted Average Exercise Price, Outstanding at September 30, 2022	$ 12.73
Granted, weighted average exercise price	7.33
Vested, weighted average exercise price	12.07
Forfeited, weighted average exercise price	10.05
Weighted Average Exercise Price, Outstanding at September 30, 2023	$ 9.32