EARNINGS (LOSSES) PER COMMON SHARE - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ 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
Numerator:
Income (loss) from continuing operations	$ 17,475			$ (56,705)			$ (38,480)	$ (257,925)
Income (loss) from discontinued operations	277			1,150			(106)	10,936
NET INCOME (LOSS)	17,752	$ (4,976)	$ (51,362)	(55,555)	$ (121,003)	$ (70,431)	(38,586)	(246,989)
Adjustment for basic earnings (loss) per share
Earnings allocated to unvested shareholders	(368)			(348)			(1,138)	(1,002)
Numerator for basic earnings (loss) per share:
From continuing operations	17,107			(57,053)			(39,618)	(258,927)
From discontinued operations	277			1,150			(106)	10,936
Net income (loss) attributable to parent, basic	17,384			(55,903)			(39,724)	(247,991)
Numerator for diluted earnings (loss) per share:
From continuing operations	17,107			(57,053)			(39,618)	(258,927)
From discontinued operations	277			1,150			(106)	10,936
Net income (loss) attributable to parent, diluted	$ 17,384			$ (55,903)			$ (39,724)	$ (247,991)
Denominator:
Denominator for basic earnings (loss) per share – weighted-average shares (in shares)	105,289			107,896			106,092	107,790
Effect of dilutive shares from stock options, restricted stock and performance units (in shares)	732			0			0	0
Denominator for diluted earnings (loss) per share – adjusted weighted-average shares (in shares)	106,021			107,896			106,092	107,790
Basic earnings (loss) per common share:
Income (loss) from continuing operations (in dollars per share)	$ 0.16			$ (0.53)			$ (0.37)	$ (2.40)
Income from discontinued operations (in dollars per share)	0			0.01			0	0.10
Net income (loss) (in dollars per share)	0.16			(0.52)			(0.37)	(2.30)
Diluted earnings (loss) per common share:
Income (loss) from continuing operations (in dollars per share)	0.16			(0.53)			(0.37)	(2.40)
Income from discontinued operations (in dollars per share)	0			0.01			0	0.10
Net Income (loss) (in dollars per share)	$ 0.16			$ (0.52)			$ (0.37)	$ (2.30)