Earnings Per Share - Schedule of Reconciliation of Basic Shares to Diluted Shares (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Numerator:
Net (loss) income - basic and diluted	$ (99,267)	$ 5,798	$ (80,699)	$ 37,902
Denominator:
Weighted average common shares outstanding - basic	39,313	37,825	39,113	37,664
Dilutive effect of restricted stock awards		1,471		1,471
Weighted average common shares outstanding - diluted	39,313	39,296	39,113	39,135
Net (loss) income per common share:
Basic	$ (2.53)	$ 0.15	$ (2.06)	$ 1.01
Diluted	$ (2.53)	$ 0.15	$ (2.06)	$ 0.97