Real Estate Investments (Allocation of Assets) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) property	Dec. 31, 2018 USD ($) property
Real estate investments, at cost:
Land	$ 55,548	$ 4,730
Building and improvements	24,324	9,245
Total tangible assets	79,872	13,975
Acquired intangibles:
Total intangible assets, net	9,393	2,039
Total assets acquired, net	89,265	16,014
Mortgage notes payable used to acquire real estate investments	(51,000)	(10,000)
Other liabilities assumed	0	(66)
Cash paid for acquired real estate investment	$ 38,265	$ 5,948
Number of properties purchased | property	1	1
Weighted-average remaining amortization period	13 years 4 months 24 days
In-place leases
Acquired intangibles:
In-place leases	$ 7,852	$ 2,166
Weighted-average remaining amortization period	13 years 4 months 24 days
Above-market lease assets
Acquired intangibles:
In-place leases	$ 1,541	165
Below-market lease liabilities
Acquired intangibles:
Below-market lease liabilities	$ 0	$ (292)