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Assets and Liabilities of Disposal Group Held for Sale - Carrying Values of Assets and Liabilities of Disposal Group Held for Sale (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
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Discontinued Operations and Disposal Groups [Abstract] |  |
Cash and cash equivalents | $ 14,859 | $ 13,944
Equity investments | 5,073 | 9,010
Real estate, net | 852,277 | 1,079,942
Other assets | 37,522 | 48,888
Total assets of disposal group held for sale | 909,731 | 1,151,784
Mortgages payable on real estate | 740,187 | 865,414
Other liabilities | 27,142 | 18,398
Total liabilities of disposal group held for sale | $ 767,329 | $ 883,812

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