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Noncash Investing and Financing Activities - Summary (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Real Estate Investments, Net [Abstract]
Accrued dividends and distributions payable	$ 17,191	$ 41,759
Additions to real estate assets accrued but not yet paid	19,757	2,071
Conversion of Operating Partnership units for common stock	0	3,059
Lease liabilities arising from obtaining right-of-use assets	4,024	0	$ 4,074
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 operating assets and liabilities	9,333	0
Decrease in intangible lease and other assets	$ (1,663)	$ 0

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- Definition

Future cash outflow to pay for real estate additions accrued but not yet paid.

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The value of the stock converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding.

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Amount of decrease in investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate, from foreclosure.

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Amount of increase (decrease) before accumulated depreciation of real estate investments for entities with a substantial portion of business acquiring and holding investment real estate.

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