Amount of real estate investment property which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.1(d))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Name:	us-gaap_RealEstateInvestmentPropertyAtCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Real Estate Transactions - Development Activities (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 property	Jun. 30, 2019 USD ($)
Medical office
Real Estate [Line Items]
Number of properties to be developed (in properties)	3
On-campus
Real Estate [Line Items]
Number of properties to be developed (in properties)	2
Forecast \| Medical office
Real Estate [Line Items]
Estimated aggregate cost \| $		$ 70