STOCK-BASED COMPENSATION (Tables)

12 Months Ended

Sep. 30, 2024

Share-Based Payment Arrangement [Abstract]

Summary of Share-Based Payment Award Valuation Assumptions

The following table sets forth the significant assumptions used for the service-based awards granted during the years ended September 30:

	2024			2023			2022
Weighted average grant date fair value	$	17.12		$	9.02		$	16.98
Risk-free interest rate	3.93		%	3.77		%	1.34		%
Expected volatility	40.00		%	40.00		%	40.00		%
Expected term (in years)	6.00			6.00			6.00
Expected dividend yield	0.00		%	0.00		%	0.00		%

Summary of Share-Based Compensation Stock Options Activity

The following table summarizes the performance-based stock option activity for the year ended September 30, 2024:

	Number of Shares	Weighted Average Exercise Price Per Share		Weighted Average Remaining Contract Term	Aggregate Intrinsic Value
				(in years)	(in thousands)
Outstanding at October 1, 2023	1,114,261	$	23.00
Granted	—	—
Exercised	(264,913)	23.00
Cancelled/Forfeited	—	—
Outstanding at September 30, 2024	849,348	23.00		5.6	20,214
Vested and exercisable at September 30, 2024	849,348	$	23.00	5.6	20,214

The following table summarizes the service-based stock option activity for the year ended September 30, 2024:

	Number of Shares	Weighted Average Exercise Price Per Share		Weighted Average Remaining Contract Term	Aggregate Intrinsic Value
				(in years)	(in thousands)
Outstanding at October 1, 2023	3,361,707	$	25.43
Granted	138,731	38.15
Exercised	(600,862)	24.56
Cancelled/Forfeited	(20,044)	42.36
Outstanding at September 30, 2024	2,879,532	26.11		6.3	59,590
Vested and exercisable at September 30, 2024	2,482,502	$	25.26	5.9	53,485

Summary of Non-Vested Restricted Stock Activity

A summary of the service-based restricted stock awards activity for the year ended September 30, 2024 was as follows:

	Number of Shares	Weighted Average Grant Date Fair Value
Outstanding and unvested at October 1, 2023	82,481	$	23.00
Granted	—	—
Vested	(82,481)	23.00
Forfeited	—	—
Outstanding and unvested at September 30, 2024	—	—

A summary of the performance-based restricted stock unit awards activity for the year ended September 30, 2024 was presented at target (unless otherwise noted) was as follows:

	Number of Shares	Weighted Average Grant Date Fair Value
Outstanding and unvested at October 1, 2023	508,622	$	26.72
Granted	173,020	38.15
Granted adjustment(1)	42,442	34.82
Vested	(123,821)	34.82
Forfeited	(10,191)	27.32
Outstanding and unvested at September 30, 2024	590,072	$	29.65

(1)The fiscal year 2021 grant vested in December 2023 and 42,442 shares were granted in connection therewith.

Schedule of Unvested Restricted Stock Units

A summary of the service-based restricted stock unit awards activity for the year ended September 30, 2024 was as follows:

	Number of Shares	Weighted Average Grant Date Fair Value
Outstanding and unvested at October 1, 2023	786,096	$	25.42
Granted	266,265	39.52
Vested	(333,087)	27.43
Forfeited	(42,250)	26.33
Outstanding and unvested at September 30, 2024	677,024	$	29.90