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Real Estate Investments, Net - Schedule of Business Acquisitions, by Acquisition (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($) property	Sep. 30, 2017 USD ($) property
Real estate investments, at cost:
Land	$ 24,269	$ 6,359
Buildings, fixtures and improvements	205,990	27,220
Total tangible assets	230,259	33,579
Acquired intangible lease assets:
Cash paid for acquired real estate investments	$ 267,379	$ 37,113
Number of properties purchased (property) | property	17	4
In-place leases
Acquired intangible lease assets:
Acquired intangibles	$ 42,031	$ 4,859
Above market lease assets
Acquired intangible lease assets:
Acquired intangibles	48	47
Below market lease liabilities
Acquired intangible lease assets:
Below-market lease liabilities	$ (4,959)	$ (1,372)

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