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Real Estate Investments, Net - Schedule of Business Acquisitions, by Acquisition (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($) property	Sep. 30, 2018 USD ($) property
Real estate investments, at cost:
Land	$ 22,441	$ 24,269
Buildings, fixtures and improvements	243,545	205,990
Total tangible assets	265,986	230,259
Acquired intangible lease assets:
Cash paid for acquired real estate investments	$ 309,003	$ 267,379
Number of properties purchased (property) | property	20	17
In-place leases
Acquired intangible lease assets:
Acquired intangibles	$ 44,256	$ 42,031
Above market lease assets
Acquired intangible lease assets:
Acquired intangibles	406	48
Below market lease liabilities
Acquired intangible lease assets:
Below-market lease liabilities	$ (1,645)	$ (4,959)

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