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Segment Reporting (Details 2) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Segment Reporting [Abstract] |  |  |  |
Rental income from real estate assets sold or held for sale | $ 3,044 | $ 16,388 | $ 15,582 | $ 53,582
Operating expenses from real estate assets sold or held for sale | (1,170) | (6,349) | (5,949) | (20,407)
Net operating income from real estate assets sold or held for sale | $ 1,874 | $ 10,039 | $ 9,633 | $ 33,175

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