Net Income (Loss) Per Share/Unit - Computation of Basic and Diluted Net Loss Per Unit (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Net income (loss) (in thousands) - Diluted	$ (33,272)	$ 75,053	$ (41,213)	$ 68,212
Plus: Dividends on preferred units	(574)	(877)	(1,491)	(1,741)
Net Income (Loss) Attributable to Common Shareholders/Unitholders	$ (33,846)	$ 74,176	$ (42,704)	$ 66,471
Basic weighted-average common units outstanding (in Share/Unit)	14,542,273	12,457,273	13,574,767	12,446,010
Effecting of dilutive securities:
Series A preferred units (in units)	0	3,969,276	0	3,940,084
Restricted units (in units)	0	59,726	0	49,151
Diluted weighted-average common units outstanding (in units)	14,542,273	16,486,275	13,574,767	16,435,245
Continuing Operations, Basic net income (loss) per common unit (USD per share)	$ (2.33)	$ 5.95	$ (3.15)	$ 5.34
Continuing Operations, Diluted net income (loss) per common unit (USD per share)	$ (2.33)	$ 4.55	$ (3.15)	$ 4.15