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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) |

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