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Commitments and Contingencies - Agreements and Investments (Details) | Dec. 31, 2019 | Dec. 31, 2018 | Aug. 31, 2018
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Co-venture and Management [Member] |  |  |
Other Commitments [Line Items] |  |  |
Annual Investment Management Fee |  |  | 1.50%
TP Fund |  |  |
Other Commitments [Line Items] |  |  |
Annual Investment Management Fee | 1.25% | 1.50% |

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- Details
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