Investments in Unconsolidated Entities - Narrative (Details) - USD ($) |
3 Months Ended | 6 Months Ended | |||
---|---|---|---|---|---|
Mar. 31, 2020 |
Mar. 31, 2019 |
Mar. 31, 2020 |
Mar. 31, 2019 |
Sep. 30, 2019 |
|
Equity Method Investments and Joint Ventures [Abstract] | |||||
Impairment of unconsolidated entity investments | $ 0 | $ 0 | $ 0 | $ 0 | |
Financial Guarantee | |||||
Schedule of Equity Method Investments [Line Items] | |||||
Outstanding guarantees | $ 0 | $ 0 | $ 0 |