Preferred Units (Tables)

12 Months Ended

Sep. 30, 2021

Temporary Equity Disclosure [Abstract]

Summary of Changes in Preferred Units

The tables below summarize the preferred unit activity during the years ended September 30, 2021 and 2020:

	Units	Amount
		(In thousands)
Balance, September 30, 2019	475,152	$	56,810
Dividends paid in kind	29,016	3,482
Balance, September 30, 2020	504,168	60,292
Dividends paid in kind	7,527	904
Units converted to common units	(511,695)	(61,196)
Balance, September 30, 2021	—	$	—