FAIR VALUE OF FINANCIAL INSTRUMENTS - Summary of Carrying Values and the Estimated Fair Values of the Debt Financial Instruments (Detail) - Fair Value, Inputs, Level 2 - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023
Principle Outstanding | 2024 Term Loan Facility due September 26, 2031
Schedule Of Carrying Values And The Estimated Fair Values Of The Debt Financial Instruments [Line Items]
Loans payable	$ 440,000	$ 0
Principle Outstanding | 2022 Term Loan Agreement due April 28, 2029
Schedule Of Carrying Values And The Estimated Fair Values Of The Debt Financial Instruments [Line Items]
Loans payable	0	594,000
Estimated Fair Value | 2024 Term Loan Facility due September 26, 2031
Schedule Of Carrying Values And The Estimated Fair Values Of The Debt Financial Instruments [Line Items]
Loans payable	443,300	0
Estimated Fair Value | 2022 Term Loan Agreement due April 28, 2029
Schedule Of Carrying Values And The Estimated Fair Values Of The Debt Financial Instruments [Line Items]
Loans payable	$ 0	$ 595,485