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CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Rental and other property revenues | $ 47,970 | $ 120,956 | $ 126,221
Property operating expenses | 25,694 | 59,587 | 64,091
General and administrative | 13,336 | 12,708 | 7,691
Interest income | 25,955 | 21,645 | 18,941
Mortgage and loan interest | 39,860 | 66,063 | 66,171
Related Parties [Member] |  |  |
Rental and other property revenues | 841 | 144 | 839
Property operating expenses | 991 | 254 | 959
General and administrative | 4,429 | 1,267 | 3,225
Interest income | 23,760 | 5,406 | 16,298
Mortgage and loan interest | $ 9,282 | $ 2,240 | $ 6,695

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