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Related Party Transactions and Investments in Non-Consolidated Entities - Summarized financial information for Sponsored REITs (Details) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2019 USD ($) entity | Jun. 30, 2018 USD ($) entity | Dec. 31, 2018 USD ($) entity
Sponsored REITs |  |  |
Number of REITs in which the entity holds non-controlling common stock interest | entity | 2 |  | 3
Number of REITs in which are included in the operations data | entity | 3 | 6 |
Number of Sponsored REITs the Company held an interest in at period end | entity | 2 |  |
Balance Sheet Data (unaudited): |  |  |
Real estate, net | $ 44,781 |  | $ 97,034
Other assets | 9,850 |  | 18,532
Total liabilities | (22,775) |  | (75,382)
Shareholders' equity | 31,856 |  | $ 40,184
Operating Data (unaudited): |  |  |
Rental revenues | 7,152 | $ 25,755 |
Other revenues |  | 1 |
Operating and maintenance expenses | (3,561) | (13,175) |
Depreciation and amortization | (2,664) | (8,606) |
Interest expense | (2,538) | (4,030) |
Gain (loss) on sale |  | 9,393 |
Net income (loss) | $ (1,611) | $ 9,338 |

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