STOCK-BASED COMPENSATION - Summary of Stock Awards Activity Other Than Options (Detail)	12 Months Ended
	Sep. 30, 2024 $ / shares shares
Service Based Restricted Stock Awards
Number of Shares
Outstanding and unvested, beginning balance (in shares) | shares	82,481
Granted (in shares) | shares	0
Vested (in shares) | shares	(82,481)
Forfeited (in shares) | shares	0
Outstanding and unvested, ending balance (in shares) | shares	0
Weighted Average Grant Date Fair Value
Outstanding and unvested, beginning balance (in dollars per share) | $ / shares	$ 23.00
Granted (in dollars per share) | $ / shares	0
Vested (in dollars per share) | $ / shares	23.00
Forfeited (in dollars per share) | $ / shares	0
Outstanding and unvested, ending balance (in dollars per share) | $ / shares	$ 0
Service Based Restricted Stock Units
Number of Shares
Outstanding and unvested, beginning balance (in shares) | shares	786,096
Granted (in shares) | shares	266,265
Vested (in shares) | shares	(333,087)
Forfeited (in shares) | shares	(42,250)
Outstanding and unvested, ending balance (in shares) | shares	677,024
Weighted Average Grant Date Fair Value
Outstanding and unvested, beginning balance (in dollars per share) | $ / shares	$ 25.42
Granted (in dollars per share) | $ / shares	39.52
Vested (in dollars per share) | $ / shares	27.43
Forfeited (in dollars per share) | $ / shares	26.33
Outstanding and unvested, ending balance (in dollars per share) | $ / shares	$ 29.90
Performance Based Restricted Stock
Number of Shares
Outstanding and unvested, beginning balance (in shares) | shares	508,622
Granted (in shares) | shares	173,020
Granted adjustment (in shares) | shares	42,442
Vested (in shares) | shares	(123,821)
Forfeited (in shares) | shares	(10,191)
Outstanding and unvested, ending balance (in shares) | shares	590,072
Weighted Average Grant Date Fair Value
Outstanding and unvested, beginning balance (in dollars per share) | $ / shares	$ 26.72
Granted (in dollars per share) | $ / shares	38.15
Granted adjustment (in dollars per share) | $ / shares	34.82
Vested (in dollars per share) | $ / shares	34.82
Forfeited (in dollars per share) | $ / shares	27.32
Outstanding and unvested, ending balance (in dollars per share) | $ / shares	$ 29.65