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Segment Reporting Segment Reporting (Details 2) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Segment Reporting [Abstract] |  |  |
Rental income from real estate assets sold or held for sale | $ 88,865 | $ 133,956 | $ 179,226
Operating expenses from real estate assets sold or held for sale | (30,245) | (49,306) | (65,007)
Net operating income from real estate assets sold or held for sale | $ 58,620 | $ 84,650 | $ 114,219

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- Definition Disposal Group, Not Discontinued Operation, Net Operating Income From Assets Held for Sale, Not Classified as Discontinued Operations + References No definition available. + Details
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- Definition Operating Expenses From Assets Held for Sale, Not Classified as Discontinued Operations + References No definition available. + Details
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- Definition Revenue From Assets Held for Sale, Not Classified as Discontinued Operations + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- References No definition available. + Details
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