Commitments and Contingencies - Construction Activity (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) ft² property	Dec. 10, 2021 property	Feb. 01, 2021 ft²	Dec. 31, 2020 ft²	Nov. 18, 2020 ft²	Nov. 09, 2020 ft²	Jul. 23, 2020 ft²
Other Commitments [Line Items]
NUMBER OF PROPERTIES | property	242	3
TOTAL FUNDED during the year	$ 33,400
Purchase price allocation square footage | ft²				1,202,438
Medical Office Building
Other Commitments [Line Items]
CONSTRUCTION IN PROGRESS BALANCE	3,974
TOTAL FUNDED during the year	23,081
TOTAL AMOUNT FUNDED	$ 45,155
Purchase price allocation square footage | ft²	1,540,141			1,202,438
Memphis, TN | Medical Office Building
Other Commitments [Line Items]
NUMBER OF PROPERTIES | property	1
CONSTRUCTION IN PROGRESS BALANCE	$ 0
TOTAL FUNDED during the year	10,052
TOTAL AMOUNT FUNDED	$ 31,702
Purchase price allocation square footage | ft²					40,192	135,270
Dallas, TX | Medical Office Building
Other Commitments [Line Items]
NUMBER OF PROPERTIES | property	1
CONSTRUCTION IN PROGRESS BALANCE	$ 0
TOTAL FUNDED during the year	7,036
TOTAL AMOUNT FUNDED	$ 7,460
Purchase price allocation square footage | ft²			121,709
Tacoma, WA | Medical Office Building
Other Commitments [Line Items]
NUMBER OF PROPERTIES | property	1
CONSTRUCTION IN PROGRESS BALANCE	$ 3,974
TOTAL FUNDED during the year	4,147
TOTAL AMOUNT FUNDED	$ 4,147
Purchase price allocation square footage | ft²							21,309
Nashville, TN | Medical Office Building
Other Commitments [Line Items]
NUMBER OF PROPERTIES | property	1
CONSTRUCTION IN PROGRESS BALANCE	$ 0
TOTAL FUNDED during the year	1,846
TOTAL AMOUNT FUNDED	$ 1,846