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Earnings Per Share - Calculations of Net (Loss) Income Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share And Equity [Abstract]
Net (loss) income	$ (182,678)	$ 16,588	$ 27,464
Basic weighted average common shares outstanding	36,133	35,713	35,237
Add: Incremental shares for:
Dilutive effect of warrants		2,543
Dilutive effect of restricted stock		587	71
Diluted weighted average common shares outstanding	36,133	38,843	35,308
Net (loss) income per share
Basic	$ (5.06)	$ 0.46	$ 0.78
Diluted	$ (5.06)	$ 0.43	$ 0.78

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