Stock-Based Employee Benefit Plans - Summary of Restricted Stock Unit Activity (Details) shares in Thousands	3 Months Ended
	Dec. 31, 2022 $ / shares shares
Shares
Granted (in shares) | shares	149
Released (in shares) | shares	(146)
Forfeited (in shares) | shares	(18)
Outstanding at December 31, 2022 (in shares) | shares	400
Weighted-average Grant-date Fair Value
Outstanding at September 30, 2022 (in dollars per share) | $ / shares	$ 398.07
Granted (in dollars per share) | $ / shares	610.04
Released (in dollars per share) | $ / shares	349.76
Forfeited (in dollars per share) | $ / shares	420.56
Outstanding at December 31, 2022 (in dollars per share) | $ / shares	$ 493.36
Restricted Stock Units
Shares
Outstanding at September 30, 2022 (in shares) | shares	415