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Real Estate - Schedule of Real Estate Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Real Estate Properties [Line Items]
Land, at cost	$ 294,604	$ 305,897
Buildings and improvements, at cost	1,442,437	1,455,182
Less: accumulated depreciation	(235,952)	(233,860)
Real estate, net	1,501,089	1,527,219
Real estate available and held for sale	34,391	8,650
Total real estate	1,535,480	1,535,869
Net Lease
Real Estate Properties [Line Items]
Land, at cost	188,418	199,710
Buildings and improvements, at cost	1,333,766	1,347,321
Less: accumulated depreciation	(221,008)	(219,949)
Real estate, net	1,301,176	1,327,082
Real estate available and held for sale	25,730	0
Total real estate	1,326,906	1,327,082
Net Lease | Net Lease Venture
Real Estate Properties [Line Items]
Real estate, net	765,300	768,600
Operating Properties
Real Estate Properties [Line Items]
Land, at cost	106,186	106,187
Buildings and improvements, at cost	108,671	107,861
Less: accumulated depreciation	(14,944)	(13,911)
Real estate, net	199,913	200,137
Real estate available and held for sale	8,661	8,650
Total real estate	208,574	208,787
Residential Condominiums
Real Estate Properties [Line Items]
Real estate available and held for sale	$ 8,700	$ 8,600

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Carrying amount as of the balance sheet date of investments in land and buildings held for sale, including real estate considered to be inventory of the entity.

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Real Estate Investment Property, Held for Use, Net

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Aggregate of the carrying amounts as of the balance sheet date of investments in building and building improvements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.1(d))
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Amount before accumulated depletion of real estate held for productive use, excluding land held for sale.

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-Topic 210
-SubTopic 10
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The cumulative amount of depreciation for real estate property held for investment purposes.

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Amount of real estate investment property, net of accumulated depreciation, which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.

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