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Real Estate Investments, Net - Schedule of Business Acquisitions, by Acquisition (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($) property	Mar. 31, 2018 USD ($) property
Real estate investments, at cost:
Land	$ 2,442	$ 10,729
Buildings, fixtures and improvements	17,349	44,772
Total tangible assets	19,791	55,501
Acquired intangible lease assets:
Cash paid for acquired real estate investments	$ 23,454	$ 63,596
Number of properties purchased (property) | property	2	6
In-place leases
Acquired intangible lease assets:
Acquired intangibles	$ 3,846	$ 8,893
Above market lease assets
Acquired intangible lease assets:
Acquired intangibles	64	0
Below market lease liabilities
Acquired intangible lease assets:
Below-market lease liabilities	$ (247)	$ (798)

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