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Investments in and Advances to Unconsolidated Affiliates - Schedule of Investments In and Advances to Unconsolidated Affiliates (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2017 | Dec. 31, 2016
Schedule of Equity Method Investments [Line Items] |  |
Due to related parties | $ 2,273 | $ 2,193
Other | 957 | 957
Investments in and advances to unconsolidated affiliates | 260,497 | 272,028
Distributions in excess of income from, and investments in, unconsolidated affiliates | $ 15,221 | 13,691
Cumulative capital contribution, percentage | 15.00% |
Preferred return percentage | 9.00% |
Cumulative capital contribution | $ 14,900 |
Preferred return | 46,400 |
Core Portfolio [Member] |  |
Schedule of Equity Method Investments [Line Items] |  |
Equity method investments | $ 163,534 | 165,031
Core Portfolio [Member] | 840 N. Michigan [Member] |  |
Schedule of Equity Method Investments [Line Items] |  |
Equity method investment, ownership percentage | 88.43% |
Equity method investments | $ 73,355 | 74,131
Core Portfolio [Member] | Renaissance Portfolio [Member] |  |
Schedule of Equity Method Investments [Line Items] |  |
Equity method investment, ownership percentage | 20.00% |
Equity method investments | $ 36,097 | 36,437
Core Portfolio [Member] | Gotham Plaza [Member] |  |
Schedule of Equity Method Investments [Line Items] |  |
Equity method investment, ownership percentage | 49.00% |
Equity method investments | $ 29,396 | 29,421
Core Portfolio [Member] | Brandywine Portfolio [Member] |  |
Schedule of Equity Method Investments [Line Items] |  |
Equity method investment, ownership percentage | 22.22% |
Equity method investments | $ 20,449 | 20,755
Core Portfolio [Member] | Georgetown Portfolio [Member] |  |
Schedule of Equity Method Investments [Line Items] |  |
Equity method investment, ownership percentage | 50.00% |
Equity method investments | $ 4,237 | 4,287
Core Portfolio [Member] | Crossroads [Member] |  |
Schedule of Equity Method Investments [Line Items] |  |
Equity method investment, ownership percentage | 49.00% |
Distributions in excess of income from, and investments in, unconsolidated affiliates | $ 15,221 | 13,691
Mervyns I and Mervyns II [Member] | KLA Mervyns LLC [Member] |  |
Schedule of Equity Method Investments [Line Items] |  |
Equity method investment, ownership percentage | 10.50% |
Equity method investments | $ 0 | 0
Fund III [Member] |  |
Schedule of Equity Method Investments [Line Items] |  |
Equity method investments | $ 466 | 8,349
Fund III [Member] | Fund III Other Portfolio [Member] |  |
Schedule of Equity Method Investments [Line Items] |  |
Equity method investment, ownership percentage | 90.00% |
Equity method investments | $ 225 | 8,108
Fund III [Member] | Self Storage Management [Member] |  |
Schedule of Equity Method Investments [Line Items] |  |
Equity method investment, ownership percentage | 95.00% |
Equity method investments | $ 241 | 241
Fund IV [Member] |  |
Schedule of Equity Method Investments [Line Items] |  |
Equity method investments | $ 93,267 | 95,498
Fund IV [Member] | Broughton Street Portfolio [Member] |  |
Schedule of Equity Method Investments [Line Items] |  |
Equity method investment, ownership percentage | 50.00% |
Equity method investments | $ 56,313 | 54,839
Fund IV [Member] | Fund IV Other Portfolio [Member] |  |
Schedule of Equity Method Investments [Line Items] |  |
Equity method investment, ownership percentage | 90.00% |
Equity method investments | $ 17,927 | 21,817
Fund IV [Member] | 650 Bald Hill Road [Member] |  |
Schedule of Equity Method Investments [Line Items] |  |
Equity method investment, ownership percentage | 90.00% |
Equity method investments | $ 19,027 | $ 18,842

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