Net (Loss) Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Numerator:
Net (loss) income from continuing operations	$ (57,559)	$ 6,954
Net income from discontinued operations	0	7,941
Net (loss) income	$ (57,559)	$ 14,895
Denominator:
Weighted average common shares outstanding — basic (in shares)	317,359	283,818
Dilutive effect of convertible instruments (in shares)	0	21,636
Dilutive effect of employee stock compensation plans (in shares)	0	8,756
Weighted average common shares outstanding — diluted (in shares)	317,359	314,210
Net (loss) income per common share - basic:
Continuing operations (in dollars per share)	$ (0.18)	$ 0.02
Discontinued operations (in dollars per share)	0	0.03
Total net (loss) income per basic common share (in dollars per share)	(0.18)	0.05
Net (loss) income per common share - diluted:
Continuing operations (in dollars per share)	(0.18)	0.02
Discontinued operations (in dollars per share)	0	0.03
Total net (loss) income per diluted common share (in dollars per share)	$ (0.18)	$ 0.05
Anti-dilutive equity instruments excluded from the calculation (in shares)	0	580
Contingently issuable awards excluded from the calculation (in shares)	112	0