DEBT - CLEAN ENERGY VENTURES (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Debt Instrument [Line Items]
Proceeds from sale leaseback transactions - solar	$ 251,171	$ 64,694	$ 167,790
CEV
Debt Instrument [Line Items]
Proceeds from sale leaseback transactions - solar	$ 251,200	$ 64,700
Minimum | CEV
Debt Instrument [Line Items]
Sale leaseback transaction lease term	5 years
Maximum | CEV
Debt Instrument [Line Items]
Sale leaseback transaction lease term	7 years