Real Estate Investments - Acquisitions (Details) - Total real estate acquisitions $ in Thousands													3 Months Ended	6 Months Ended
	Aug. 04, 2021 USD ($) ft²	Jul. 27, 2021 USD ($) ft²	Jul. 19, 2021 USD ($) ft²	Jul. 16, 2021 USD ($) ft² property	Jun. 29, 2021 USD ($) ft²	Jun. 28, 2021 USD ($) ft²	May 28, 2021 USD ($) ft²	May 14, 2021 USD ($) ft²	Mar. 03, 2021 USD ($) ft²	Feb. 17, 2021 USD ($) ft²	Feb. 01, 2021 USD ($) ft²	Jan. 17, 2021 USD ($) ft²	Jun. 30, 2021 USD ($) ft² property	Jun. 30, 2021 USD ($) ft²
Business Acquisition [Line Items]
Purchase price														$ 202,355
Cash consideration														203,019
Real estate													$ 205,046	205,046
Other													$ (2,027)	$ (2,027)
Square footage | ft²													479,504	479,504
Medical office building
Business Acquisition [Line Items]
Number of properties acquired | property													2
Medical office building | Subsequent event
Business Acquisition [Line Items]
Square footage | ft²	347,200
Medical office building | San Diego, CA
Business Acquisition [Line Items]
Purchase price							$ 102,650					$ 17,150
Cash consideration							103,984					17,182
Real estate							104,629					17,182
Other							$ (645)					$ 0
Square footage | ft²							160,394					22,461
Medical office building | Dallas, TX
Business Acquisition [Line Items]
Purchase price											$ 22,515
Cash consideration											22,299
Real estate											22,641
Other											$ (342)
Square footage | ft²											121,709
Medical office building | Atlanta, GA
Business Acquisition [Line Items]
Purchase price										$ 9,800
Cash consideration										10,027
Real estate										10,073
Other										$ (46)
Square footage | ft²										44,567
Medical office building | Washington, D.C.
Business Acquisition [Line Items]
Purchase price									$ 12,750
Cash consideration									12,709
Real estate									12,658
Other									$ 51
Square footage | ft²									26,496
Medical office building | Houston, TX
Business Acquisition [Line Items]
Purchase price								$ 13,500
Cash consideration								12,986
Real estate								13,379
Other								$ (393)
Square footage | ft²								45,393
Medical office building | Greensboro, NC
Business Acquisition [Line Items]
Purchase price						$ 9,390
Cash consideration						9,475
Real estate						10,047
Other						$ (572)
Square footage | ft²						25,168
Medical office building | Greensboro, NC | Subsequent event
Business Acquisition [Line Items]
Purchase price			$ 6,400
Square footage | ft²			18,119
Medical office building | Baltimore, MD
Business Acquisition [Line Items]
Purchase price					$ 14,600
Cash consideration					14,357
Real estate					14,437
Other					$ (80)
Square footage | ft²					33,316
Medical office building | Denver, CO | Subsequent event
Business Acquisition [Line Items]
Purchase price				$ 70,426
Square footage | ft²				259,555
Number of properties acquired | property				3
Medical office building | Colorado Springs, CO | Subsequent event
Business Acquisition [Line Items]
Purchase price	$ 110,226	$ 33,400
Square footage | ft²		69,526