Real Estate Investments and Related Intangibles - Schedule of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Acquisitions, 2021 [Member]
Real estate investments, at cost:
Land	$ 77,303
Buildings, fixtures and improvements	249,850
Total tangible assets	327,153
Assumed intangible liabilities:
Total purchase price of assets acquired	419,181
Acquisitions, 2021 [Member] | In-place leases and other intangible assets [Member]
Acquired intangible assets:
Acquired intangible assets	$ 40,056
Assumed intangible liabilities:
Weighted-average useful life	15 years 7 months 6 days
Acquisitions, 2021 [Member] | Above-market leases [Member]
Acquired intangible assets:
Acquired intangible assets	$ 54,698
Assumed intangible liabilities:
Weighted-average useful life	18 years 2 months 12 days
Acquisitions, 2021 [Member] | Below-market Lease [Member]
Assumed intangible liabilities:
Below-market leases	$ (2,726)
Weighted-average useful life	19 years 10 months 24 days
Acquisitions, 2020 [Member]
Real estate investments, at cost:
Land		$ 19,953
Buildings, fixtures and improvements		95,728
Total tangible assets		115,681
Assumed intangible liabilities:
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
Assumed intangible liabilities:
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
Assumed intangible liabilities:
Weighted-average useful life	20 years 1 month 6 days
Acquisitions, 2020 [Member] | Below-market Lease [Member]
Assumed intangible liabilities:
Below-market leases		$ 0