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Real Estate Investments, Net - Schedule of Business Acquisitions, by Acquisition (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($) property	Jun. 30, 2018 USD ($) property
Real estate investments, at cost:
Land	$ 10,978	$ 18,816
Buildings, fixtures and improvements	165,261	122,796
Total tangible assets	176,239	141,612
Acquired intangible lease assets:
Cash paid for acquired real estate investments	$ 210,991	$ 161,786
Number of properties purchased (property) | property	11	13
In-place leases
Acquired intangible lease assets:
Acquired intangibles	$ 35,698	$ 24,669
Above market lease assets
Acquired intangible lease assets:
Acquired intangibles	352	0
Below market lease liabilities
Acquired intangible lease assets:
Below-market lease liabilities	$ (1,298)	$ (4,495)

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