Real Estate Investments, Net (Summary of Amortization and Accretion Recognized) (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Finite-Lived Intangible Assets [Line Items]
(Accretion) and Amortization of above-and below-market leases, net (2)	$ 18	$ (50)
Depreciation and Amortization Expense \| In-place Leases and Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Amortization of market least intangibles	4,009	4,062
Rental Income \| Above and Below Market Leases
Finite-Lived Intangible Assets [Line Items]
(Accretion) and Amortization of above-and below-market leases, net (2)	(21)	(110)
Property Operating and Maintenance Expense \| Above market ground leases
Finite-Lived Intangible Assets [Line Items]
Amortization of market least intangibles	$ 39	$ 21

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 45
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-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274

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