STOCK INCENTIVE PLAN - Stock Options Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of common stock, net of taxes withheld	$ (6,214)	$ (17,824)	$ (14,428)
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	$ 11
Weighted-average period (years)	10 years 9 months 18 days
Fair value of shares vested	$ 1,399	2,524	1,924
Issuance of common stock, net of taxes withheld	141	4,670	973
Tax benefit for tax deductions from stock options exercised	$ 2,261	$ 10,503	$ 2,300