Commitments and Contingencies - Narrative (Details)	12 Months Ended
	Dec. 31, 2021 USD ($) ft² property	Jul. 27, 2021 a	Dec. 31, 2020 USD ($) ft² property
Property, Plant and Equipment [Line Items]
Total funded during the year	$ 33,400,000
Square footage of real estate properties		3.0	17,000,000
Number of land parcels held for development | property	7		8
Investment in land held for development	$ 24,800,000		$ 27,200,000
Capital and Tenant Improvements
Property, Plant and Equipment [Line Items]
Total funded during the year	2,100,000
Tenant Improvement Allowances
Property, Plant and Equipment [Line Items]
Total funded during the year	8,200,000
First and Second Generation Leases | Tenant Improvement Allowances
Property, Plant and Equipment [Line Items]
Anticipated amount of investment	$ 76,100,000
Medical Office Building Demolition | Nashville, TN
Property, Plant and Equipment [Line Items]
Square footage of real estate properties | ft²	81,000
Medical Office Building
Property, Plant and Equipment [Line Items]
Total funded during the year	$ 23,081,000
Medical Office Building | Memphis, TN
Property, Plant and Equipment [Line Items]
Total funded during the year	$ 10,052,000
Square footage of real estate properties | ft²	110,883
Medical Office Building | Dallas, TX
Property, Plant and Equipment [Line Items]
Total funded during the year	$ 7,036,000
Square footage of real estate properties | ft²	217,114
Total funding during the year, excluding purchase of land and building	$ 7,000,000
Medical Office Building | Seattle, WA
Property, Plant and Equipment [Line Items]
Total funded during the year	$ 4,147,000
Square footage of real estate properties | ft²	23,000
Medical Office Building | Nashville, TN
Property, Plant and Equipment [Line Items]
Total funded during the year	$ 1,900,000
Square footage of real estate properties | ft²	106,194
Impairment charge	$ 5,000,000