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Related Party Transactions and Investments in Non-Consolidated Entities - Summarized financial information for Sponsored REITs (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 USD ($) entity | Dec. 31, 2017 USD ($) entity | Dec. 31, 2019 entity
Related Party Transactions and Investments in Non-Consolidated Entities |  |  |
Number of REITs in which the entity holds non-controlling common stock interest | entity | 3 | 6 | 2
Number of REITs in which are included in the operations data | entity | 6 | 7 |
Number of Sponsored REITs the Company held an interest in at period end | entity | 3 |  | 2
Balance Sheet Data (unaudited): |  |  |
Real estate, net | $ 97,034 |  |
Other assets | 18,532 |  |
Total liabilities | (75,382) |  |
Shareholders' equity | 40,184 |  |
Operating Data (unaudited): |  |  |
Rental revenues | 40,382 | $ 53,249 |
Other revenues | 1 | 7 |
Operating and maintenance expenses | (20,584) | (27,495) |
Depreciation and amortization | (13,077) | (18,395) |
Interest expense | (6,869) | (8,281) |
Gain (loss) on sale | 17,095 | (702) |
Net income (loss) | $ 16,948 | $ (1,617) |

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