Equity Incentive Plans - Schedule of Restricted Stock Unit Activity (Details) - Restricted Stock Units $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2022 USD ($) $ / shares shares
Shares
Balance of outstanding restricted stock units, beginning, Shares | shares	3,217
Granted, shares | shares	1,659
Vested, Shares | shares	(1,736)
Forfeited or not earned, Shares | shares	(386)
Balance of outstanding restricted stock units, ending, Shares | shares	2,754
Weighted- Average Grant Date Fair Value
Balance of outstanding restricted stock units, beginning (in USD per share) | $ / shares	$ 92.46
Granted (in USD per share) | $ / shares	114.31
Vested (in USD per share) | $ / shares	92.70
Forfeited or not earned (in USD per share) | $ / shares	100.05
Balance of outstanding restricted stock units, ending (in USD per share) | $ / shares	$ 105.07
Intrinsic value [Abstract]
Aggregate Intrinsic Value, Ending Balance of outstanding restricted stock | $	$ 288,068