Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Basic earnings (loss) per common share:
Net Income (loss) - Basic	$ 50,160	$ 8,612	$ (68,463)
Weighted shares outstanding - Basic	56,498	55,744	55,313
Earnings (loss) per common share (in dollars per share)	$ 0.89	$ 0.15	$ (1.24)
Diluted earnings (loss) per common share:
Net Income (loss) - Basic	$ 50,160	$ 8,612	$ (68,463)
Add: Convertible Notes interest expense, net of tax	7,489	0	0
Net Income (loss) - Diluted	$ 57,649	$ 8,612	$ (68,463)
Weighted shares outstanding - basic (in shares)	56,498	55,744	55,313
Effect of dilution from equity-based compensation awards (in shares)	678	205	0
Effect of dilution from if-converted Convertible Notes (in shares)	25,224	0	0
Weighted Shares Outstanding - Diluted (in shares)	82,400	55,949	55,313
Diluted earnings (loss) per common share (in dollars per share)	$ 0.70	$ 0.15	$ (1.24)
Potential common shares excluded from the calculation of diluted earnings per share above, restricted stock (in shares)	1,975	1,233	2,786