Investments in Real Estate - Acquisitions Narrative (Details) - Real Estate Investment - USD ($)	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Investments in real estate properties
Revenue generated from acquired properties during the period	$ 54,600,000	$ 92,000,000.0
Net income generated from acquired properties during the period	19,400,000	36,900,000
Contingent consideration associated with acquisitions	$ 0	$ 0

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