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Noncash Investing and Financing Activities - Summary (Details) - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2020 | Sep. 30, 2019
Other Significant Noncash Transactions [Line Items] |  |
Additions to real estate assets accrued but not yet paid | $ 6,183 | $ 23,148
Accrued dividends and distributions payable |  | 2,420
Increase (decrease) in lease liabilities arising from obtaining right-of-use assets | (120) | 3,975
Decrease in real estate assets | (11,834) | (60,059)
Decrease in mortgage and other indebtedness | 25,956 | 124,111
Decrease in operating assets and liabilities | 1,371 | 9,333
Decrease in intangible lease and other assets | (86) | (1,663)
Conversion of Operating Partnership common units into shares of common stock | $ 21,065 |
Deconsolidation upon contribution/assignment of interest in joint venture |  |
Other Significant Noncash Transactions [Line Items] |  |
Decrease in real estate assets |  | (93,360)
Increase in investment in unconsolidated affiliates |  | 17,903
Decrease in mortgage and other indebtedness |  | 73,283
Decrease in operating assets and liabilities |  | 2,443
Decrease in intangible lease and other assets |  | (908)
Decrease in noncontrolling interest and joint venture interest |  | $ 4,271

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