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Noncash Investing and Financing Activities - Summary (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2019 | Sep. 30, 2018
Real Estate Investments, Net [Abstract] |  |  |
Accrued dividends and distributions payable | $ 2,420 | $ 2,420 | $ 41,657
Additions to real estate assets accrued but not yet paid |  | 23,148 | 22,428
Conversion of Operating Partnership units for common stock |  | 0 | 3,059
Lease liabilities arising from obtaining right-of-use assets |  | 3,975 | 0
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Abstract] |  |  |
Decrease in real estate assets |  | (60,059) | 0
Decrease in mortgage and other indebtedness |  | 124,111 | 0
Decrease in noncontrolling interest and joint venture interest | $ 4,270 |  |
Decrease in operating assets and liabilities |  | 9,333 | 0
Decrease in intangible lease and other assets |  | (1,663) | 0
Corporate Joint Venture |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Abstract] |  |  |
Decrease in real estate assets |  | (93,360) | (587)
Increase in investment in unconsolidated affiliates |  | 17,903 | 974
Decrease in mortgage and other indebtedness |  | 73,283 | 0
Decrease in operating assets and liabilities |  | 2,443 | 0
Decrease in intangible lease and other assets |  | (908) | 0
Decrease in noncontrolling interest and joint venture interest |  | $ 4,271 | $ 0

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