Net Income (Loss) Per Share/Unit - Computation of Basic and Diluted Net Loss Per Unit (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share [Abstract]
Net income (loss)	$ 21,398	$ (7,941)
Less: Dividends on preferred units	0	(917)
Net Income (Loss) Attributable to Common Shareholders/Unitholders	$ 21,398	$ (8,858)
Basic weighted-average common shares/units outstanding (in Shares/Units)	19,470	12,469
Effecting of dilutive securities:
Restricted shares/units (in Shares/Units)	99	0
Diluted weighted-average common shares/units outstanding (in Shares/Units)	19,569	12,469
Basic net income (loss) per common share/unit (USD per Share/Unit)	$ 1.10	$ (0.71)
Diluted net income (loss) per common share/unit (USD per Share/Unit)	$ 1.09	$ (0.71)