Real Estate Investments and Related Intangibles - Schedule of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Acquired intangible assets:
Below market lease, weighted average useful life	18 years 10 months 24 days
Acquisition, 2019 [Member]
Real estate investments, at cost:
Land	$ 17,716
Buildings, fixtures and improvements	53,923
Total tangible assets	71,639
Acquired intangible assets:
Total purchase price of assets acquired	81,084
Acquisition, 2019 [Member] | In-place leases and other intangible assets [Member]
Acquired intangible assets:
Acquired intangible assets	$ 9,445
Weighted-Average Useful Life	12 years 6 months
Acquisition, 2019 [Member] | Above-market leases [Member]
Acquired intangible assets:
Acquired intangible assets	$ 0
Acquisitions 2018 [Member]
Real estate investments, at cost:
Land		$ 27,049
Buildings, fixtures and improvements		96,044
Total tangible assets		123,093
Acquired intangible assets:
Total purchase price of assets acquired		139,882
Acquisitions 2018 [Member] | In-place leases and other intangible assets [Member]
Acquired intangible assets:
Acquired intangible assets		$ 14,037
Weighted-Average Useful Life		14 years 10 months 24 days
Acquisitions 2018 [Member] | Above-market leases [Member]
Acquired intangible assets:
Acquired intangible assets		$ 2,752
Weighted-Average Useful Life		10 years 9 months 18 days