Stock-Based Compensation - Summary of RSUs Activity (Details) - Restricted Stock Units (RSUs)	9 Months Ended
	Jun. 30, 2023 $ / shares shares
Number of RSUs
Beginning of period (in shares) | shares	4,069,431
Granted (in shares) | shares	1,144,594
Vested (in shares) | shares	(798,271)
Forfeited (in shares) | shares	(93,688)
End of period (in shares) | shares	4,322,066
Weighted- Average Grant Date Fair Value Per Share
Beginning balance (in dollars per share) | $ / shares	$ 62.96
Granted (in dollars per share) | $ / shares	34.27
Vested (in dollars per share) | $ / shares	53.72
Forfeited (in dollars per share) | $ / shares	54.58
Ending balance (in dollars per share) | $ / shares	$ 57.45