STOCK INCENTIVE PLAN - Performance Share Assumptions (Details) - Performance Shares - $ / shares	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield	0.00%	0.00%	0.00%
Expected volatility	46.00%	47.00%	68.00%
Risk free interest rates	4.21%	4.77%	4.15%
Expected life	3 years	3 years	3 years
Fair value (in dollars per share)	$ 114.57	$ 162.15	$ 121.52