OTHER COMPREHENSIVE INCOME (LOSS) - Amounts Reclassified from AOCI (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2022	Jun. 30, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Income before taxes from continuing operations	$ 76,050			$ 26,893			$ 182,765	$ 92,546
Tax benefit (expense)	(23,268)			(12,078)			(55,119)	(34,868)
Net income	140,287	$ 65,689	$ 19,298	16,707	$ 17,112	$ 29,500	225,274	63,319
Accumulated other comprehensive income (loss), attributable to parent | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Income before taxes from continuing operations	(128)			(1,986)			1,099	(7,531)
Tax benefit (expense)	27			417			(230)	1,582
Net income	(101)			(1,569)			869	(5,949)
Pension and other defined benefit plans | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Income before taxes from continuing operations	(844)			(1,573)			(2,534)	(4,719)
Cash flow hedges | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Income before taxes from continuing operations	$ 716			$ (413)			$ 3,633	$ (2,812)