Investments in Unconsolidated Entities - Outstanding Borrowings of Unconsolidated Entities and Equity in Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Sep. 30, 2019
Equity Method Investments and Joint Ventures [Abstract]
Investment in unconsolidated entities	$ 3,930		$ 3,962
Total equity of unconsolidated entities	8,501		9,969
Total outstanding borrowings of unconsolidated entities	12,618		$ 12,658
Equity in loss of unconsolidated entities	$ (13)	$ (64)