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Stock-Based Compensation - Summary of Stock Option Activities (Detail) - $ / shares
9 Months Ended
Jun. 30, 2022
Performance Shares [Member]  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Number of Option, Outstanding 1,556,489
Number of Option, Granted
Number of Option, Exercised (123,008)
Number of Option, Cancelled/Forfeited (5,436)
Number of Option, Outstanding 1,428,045
Number of Option, Vested and exercisable 1,428,045
Weighted Average Exercise Price Per Share, Outstanding $ 23.00
Weighted Average Exercise Price Per Share, Granted 0
Weighted Average Exercise Price Per Share, Exercised 23.00
Weighted Average Exercise Price Per Share, Cancelled/Forfeited 23.00
Weighted Average Exercise Price Per Share, Outstanding 23.00
Weighted Average Exercise Price Per Share, Vested and exercisable $ 23.00
Weighted Average Remaining Contract Term, Outstanding 7 years 10 months 24 days
Weighted Average Remaining Contract Term, Vested and exercisable 7 years 10 months 24 days
Service Based Stock Option Activity [Member]  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Number of Option, Outstanding 3,434,221
Number of Option, Granted 333,234
Number of Option, Exercised (137,641)
Number of Option, Cancelled/Forfeited (48,150)
Number of Option, Outstanding 3,581,664
Number of Option, Vested and exercisable 2,050,502
Weighted Average Exercise Price Per Share, Outstanding $ 23.82
Weighted Average Exercise Price Per Share, Granted 42.23
Weighted Average Exercise Price Per Share, Exercised 23.00
Weighted Average Exercise Price Per Share, Cancelled/Forfeited 24.49
Weighted Average Exercise Price Per Share, Outstanding 25.55
Weighted Average Exercise Price Per Share, Vested and exercisable $ 23.20
Weighted Average Remaining Contract Term, Outstanding 8 years 1 month 6 days
Weighted Average Remaining Contract Term, Vested and exercisable 7 years 10 months 24 days