Earnings Per Share - Additional Information (Details)	3 Months Ended
Dec. 31, 2021 USD ($) shares	Dec. 31, 2020 shares
Earnings Per Share [Line Items]
Antidilutive shares \| shares	0	0
3.00% Convertible Senior Notes Due 2025
Earnings Per Share [Line Items]
Debt instrument conversion ratio	26.7271
Conversion of notes to common stock per principal amount \| $	$ 1,000

Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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