(Loss) Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Dec. 31, 2022	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Basic (loss) earnings per common share:
Net (loss) income - basic		$ (6,790)	$ 14,887	$ 9,988	$ 30,608
Weighted shares outstanding - basic (in shares)		55,648	56,561	55,981	56,370
Basic (loss) earnings per common share (in dollars per share)		$ (0.12)	$ 0.26	$ 0.18	$ 0.54
Diluted (loss) earnings per common share:
Net (loss) income - basic		$ (6,790)	$ 14,887	$ 9,988	$ 30,608
Add: Convertible Notes interest expense, net of tax		0	1,846	(2,733)	3,730
Net (loss) income - diluted		$ (6,790)	$ 16,733	$ 7,255	$ 34,338
Weighted shares outstanding - basic (in shares)		55,648	56,561	55,981	56,370
Equity-based compensation awards - Effect of dilution (in shares)		0	622	1,067	676
Convertible Notes - Effect of dilution (in shares)		0	25,224	8,221	25,224
Weighted shares outstanding - diluted (in shares)		55,648	82,407	65,269	82,270
Diluted (loss) earnings per common share (in dollars per share)		$ (0.12)	$ 0.20	$ 0.11	$ 0.42
Potential common shares excluded from the calculation of diluted (loss) earnings per common share above (in shares)		32,935	1,756	21,669	1,847
Gain (loss) on extinguishment of debt	$ (3,500)			$ (3,545)	$ 0
2025 Convertible Notes
Diluted (loss) earnings per common share:
Gain (loss) on extinguishment of debt				$ 5,400
Share-Based Payment Arrangement
Diluted (loss) earnings per common share:
Potential common shares excluded from the calculation of diluted (loss) earnings per common share above (in shares)		1,014	0	0	0
Convertible Debt Securities
Diluted (loss) earnings per common share:
Potential common shares excluded from the calculation of diluted (loss) earnings per common share above (in shares)		30,417	0	20,141	0
Restricted stock
Diluted (loss) earnings per common share:
Potential common shares excluded from the calculation of diluted (loss) earnings per common share above (in shares)		1,504	1,756	1,528	1,847