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Property Dispositions and Real Estate Impairment - Schedule of Properties Held for Sale (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Discontinued Operations and Disposal Groups [Abstract] |  |
Real estate, at cost | $ 2,827 | $ 25,957
Real estate, intangible assets | 0 | 7,789
Accumulated depreciation and amortization | 0 | (13,346)
Rent receivable - deferred | 0 | 1,715
Other | 0 | 1,693
Assets held for sale | 2,827 | 23,808
Other | 0 | 191
Liabilities held for sale | $ 0 | $ 191

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