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Related Party Transactions and Investments in Non-Consolidated Entities - Equity in losses of investment in non-consolidated REITs (Details) - USD ($) $ in Thousands |  |  |  |  |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 27, 2018 | Sep. 24, 2018 | Aug. 17, 2018 | Jul. 19, 2018 | May 29, 2009 | Dec. 27, 2007 | May 31, 2009 | Dec. 31, 2007 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Sponsored REITs |  |  |  |  |  |  |  |  |  |  |
Equity in income (loss) of non-consolidated REITs |  |  |  |  |  |  |  |  | $ 6,793 | $ (3,604) | $ (831)
Impairment charge |  |  |  |  |  |  |  |  | (309) | (2,519) |
Amount received |  |  |  |  |  |  |  |  | 74,931 |  |
Distributions received from non-consolidated REITs |  |  |  |  |  |  |  |  |  |  |
Distributions from non-consolidated REITs |  |  |  |  |  |  |  |  | 710 | 1,396 | 1,023
Equity Method Investment Distribution in Excess of Earnings |  |  |  |  |  |  |  |  | 710 | 1,396 | 1,023
East Wacker |  |  |  |  |  |  |  |  |  |  |
Sponsored REITs |  |  |  |  |  |  |  |  |  |  |
Equity in income (loss) of non-consolidated REITs |  |  |  |  |  |  |  |  | 7,209 | (428) | (563)
Preferred shares purchased |  |  |  |  |  | 965.75 |  | 965.75 |  |  |
Percentage of outstanding preferred shares purchased |  |  |  |  |  | 43.70% |  | 43.70% |  |  |
Liquidating distribution receivable |  | $ 70,000 |  |  |  |  |  |  |  |  |
Gain (loss) on liquidation |  | $ 7,100 |  |  |  |  |  |  |  |  |
Amount received | $ 69,000 |  |  |  |  |  |  |  |  |  |
Beneficial interest |  |  |  |  |  |  |  |  | 1,000 |  |
Distributions received from non-consolidated REITs |  |  |  |  |  |  |  |  |  |  |
Distributions from non-consolidated REITs |  |  |  |  |  |  |  |  | 657 | 1,289 | 916
Grand Boulevard |  |  |  |  |  |  |  |  |  |  |
Sponsored REITs |  |  |  |  |  |  |  |  |  |  |
Equity in income (loss) of non-consolidated REITs |  |  |  |  |  |  |  |  | (107) | (657) | (268)
Preferred shares purchased |  |  |  |  | 175.5 |  | 175.5 |  |  |  |
Percentage of outstanding preferred shares purchased |  |  |  |  | 27.00% |  | 27.00% |  |  |  |
Liquidating distribution receivable |  |  |  | $ 6,200 |  |  |  |  |  |  |
Gain (loss) on liquidation |  |  |  | $ (100) |  |  |  |  |  |  |
Amount received |  |  | $ 5,900 |  |  |  |  |  |  |  |
Beneficial interest |  |  |  |  |  |  |  |  | 300 |  |
Distributions received from non-consolidated REITs |  |  |  |  |  |  |  |  |  |  |
Distributions from non-consolidated REITs |  |  |  |  |  |  |  |  | $ 53 | $ 107 | $ 107

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