STOCK-BASED COMPENSATION - Summary of Stock Option Activities (Detail) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2024 USD ($) $ / shares shares
Performance Shares
Number of Shares
Outstanding, beginning balance (in shares) | shares	1,114,261
Granted (in shares) | shares	0
Exercised (in shares) | shares	(264,913)
Cancelled/Forfeited (in shares) | shares	0
Outstanding, ending balance (in shares) | shares	849,348
Weighted Average Exercise Price Per Share
Outstanding, beginning balance (in dollars per share) | $ / shares	$ 23.00
Granted (in dollars per share) | $ / shares	0
Exercised (in dollars per share) | $ / shares	23.00
Cancelled/Forfeited (in dollars per share) | $ / shares	0
Outstanding, ending balance (in dollars per share) | $ / shares	$ 23.00
Stock Options Additional Disclosures
Vested and exercisable (in shares) | shares	849,348
Vested and exercisable (in dollars per share) | $ / shares	$ 23.00
Weighted Average Remaining Contract Term, Outstanding	5 years 7 months 6 days
Weighted Average Remaining Contract Term, Vested and exercisable	5 years 7 months 6 days
Weighted Aggregate Intrinsic Value, Outstanding | $	$ 20,214
Weighted Aggregate Intrinsic Value, Vested and exercisable | $	$ 20,214
Service Based Stock Options
Number of Shares
Outstanding, beginning balance (in shares) | shares	3,361,707
Granted (in shares) | shares	138,731
Exercised (in shares) | shares	(600,862)
Cancelled/Forfeited (in shares) | shares	(20,044)
Outstanding, ending balance (in shares) | shares	2,879,532
Weighted Average Exercise Price Per Share
Outstanding, beginning balance (in dollars per share) | $ / shares	$ 25.43
Granted (in dollars per share) | $ / shares	38.15
Exercised (in dollars per share) | $ / shares	24.56
Cancelled/Forfeited (in dollars per share) | $ / shares	42.36
Outstanding, ending balance (in dollars per share) | $ / shares	$ 26.11
Stock Options Additional Disclosures
Vested and exercisable (in shares) | shares	2,482,502
Vested and exercisable (in dollars per share) | $ / shares	$ 25.26
Weighted Average Remaining Contract Term, Outstanding	6 years 3 months 18 days
Weighted Average Remaining Contract Term, Vested and exercisable	5 years 10 months 24 days
Weighted Aggregate Intrinsic Value, Outstanding | $	$ 59,590
Weighted Aggregate Intrinsic Value, Vested and exercisable | $	$ 53,485