Real Estate Investments and Related Intangibles - Schedule of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Acquisitions, 2020 [Member]
Real estate investments, at cost:
Land	$ 19,953
Buildings, fixtures and improvements	95,728
Total tangible assets	115,681
Acquired intangible assets:
Total purchase price of assets acquired	147,121
Acquisitions, 2020 [Member] \| In-place leases and other intangible assets [Member]
Acquired intangible assets:
Acquired intangible assets	$ 15,739
Weighted-average useful life	18 years 1 month 6 days
Acquisitions, 2020 [Member] \| Above-market leases [Member]
Acquired intangible assets:
Acquired intangible assets	$ 15,701
Weighted-average useful life	20 years 1 month 6 days
Acquisitions, 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
Acquisitions, 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
Acquisitions, 2019 [Member] \| Above-market leases [Member]
Acquired intangible assets:
Acquired intangible assets		$ 0

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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