Investments in Real Estate - Acquisitions Narrative (Details) - Real Estate Investment - USD ($)	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019
Investments in real estate properties
Contingent consideration associated with acquisitions	$ 0	$ 0
Revenue generated from acquired properties during the period	13,600,000	19,700,000
Net income generated from acquired properties during the period	$ 4,600,000	$ 10,000,000.0

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_RealEstatePropertiesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration