Investments in Unconsolidated Entities - Outstanding Borrowings of Unconsolidated Entities and Equity in Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Sep. 30, 2018
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments	$ 3,650		$ 4,035
Total equity of unconsolidated entities	8,578		10,113
Total outstanding borrowings of unconsolidated entities	11,867		$ 12,266
Equity in loss of unconsolidated entities	$ (64)	$ (101)