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Investment in Unconsolidated Entities - Operating Statements (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Unconsolidated Entities Operating Statements: |  |  |
Rental revenues | $ 37,196 | $ 26,397 | $ 2,121
Real estate sales | 92,900 | 0 | 0
Cost of real estate sales | (55,544) | 0 | 0
Other income | 2,906 | 3,131 | 3,732
Operating expenses | (21,375) | (19,227) | (9,267)
Income (loss) before debt service, acquisition costs, and depreciation and amortization | 56,083 | 10,301 | (3,414)
Interest expense | (16,704) | (6,149) | (356)
Acquisition costs | (432) | (1,448) | (1,660)
Depreciation and amortization | (13,659) | (15,879) | (1,711)
Net (loss) income | $ 25,288 | $ (13,175) | $ (7,141)

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