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INVESTMENT IN UNCONSOLIDATED REAL ESTATE VENTURES - Aggregate Principal Payments of Recourse and Non-recourse Debt Payable to Third-parties (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Schedule of Equity Method Investments [Line Items] |  |
2020 | $ 87,226 |
2021 | 15,143 |
2022 | 256,332 |
2023 | 556,736 |
2024 | 350,000 |
Thereafter | 878,610 |
Total principal payments | 596,007 | $ 370,319
Net deferred financing costs | (10,336) |
Outstanding indebtedness | 585,068 | $ 365,707
Unconsolidated Real Estate Ventures |  |
Schedule of Equity Method Investments [Line Items] |  |
2020 | 0 |
2021 | 114,845 |
2022 | 0 |
2023 | 273,860 |
2024 | 207,302 |
Thereafter | 0 |
Total principal payments | 596,007 |
Net deferred financing costs | (10,939) |
Outstanding indebtedness | $ 585,068 |

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