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Investments in and Advances to Unconsolidated Affiliates - Schedule of Investments (Parenthetical) (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
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KLA Mervyns LLC |  |
Schedule of Equity Method Investments [Line Items] |  |
Equity method investments | $ 0 | $ 0
Broughton St. Portfolio Savannah, GA |  |
Schedule of Equity Method Investments [Line Items] |  |
Equity method investments | $ 12,579 | 3,236
Cumulative capital contribution, percentage | 15.00% |
Cumulative capital contribution | $ 5,900 | 3,000
Preferred return percentage | 9.00% |
Preferred return | $ 9,400 | $ 2,800

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