INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income tax benefit	$ (17,578)	$ (32,031)	$ (116,853)	$ (5,602)
Effective tax rate	27.60%	17.20%	21.10%	7.00%