Equity-Based Compensation - Summary of Company's Performance Stock Unit Activity (Details)	6 Months Ended
	Mar. 31, 2024 $ / shares shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Weighted Average Exercise Price, Outstanding at September 30, 2023	$ 19.06
Forfeited, weighted average exercise price	19.29
Weighted Average Exercise Price, Outstanding at March 31, 2024	$ 19.03
Performance Shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Beginning balance, Outstanding | shares | shares	512,000
Granted | shares | shares	918,000
Forfeited | shares | shares	186,000
Ending balance, Outstanding | shares | shares	1,244,000
Weighted Average Exercise Price, Outstanding at September 30, 2023	$ 7.48
Granted, weighted average exercise price	7.35
Forfeited, weighted average exercise price	7.41
Weighted Average Exercise Price, Outstanding at March 31, 2024	$ 7.39