REPORTING SEGMENT AND OTHER OPERATIONS DATA - NET FINANCIAL EARNINGS (LOSS) RECONCILIATION (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting [Abstract]
Net financial earnings	$ 72,444	$ 110,284
Less:
Unrealized gain on derivative instruments and related transactions	(5,400)	(31,503)
Tax effect	1,282	7,487
Effects of economic hedging related to natural gas inventory	(16,228)	23,972
Tax effect	3,857	(5,697)
NFE tax adjustment	(478)	104
NET INCOME	$ 89,411	$ 115,921