Acquisitions and Divestitures - Additional Information (Detail) $ in Millions	1 Months Ended		3 Months Ended
	Mar. 31, 2022 USD ($) ft²	Jan. 31, 2022 USD ($) ft² Time Tenant	Mar. 31, 2022 ft² Disposition	Mar. 31, 2021 Disposition Acquisition
Business Acquisitions And Dispositions [Line Items]
Number of dispositions | Disposition			0	0
Number of acquisitions | Acquisition				0
Beaumont Heart And Vascular Center | Dearborn Michigan
Business Acquisitions And Dispositions [Line Items]
Total purchase price | $	$ 5.4
Percentage of building area leased	100.00%
Rentable square feet | ft²	17,621		17,621
Lease expiration date	Nov. 30, 2026
Lease commencing date	Dec. 01, 2022
Percentage of lease escalations	2.5
140 Thomas Johnson Drive Medical Office Building | Frederick, Maryland
Business Acquisitions And Dispositions [Line Items]
Rentable square feet | ft²		20,146
Payment to acquire business | $		$ 8.0
Percentage of lease		100.00%
Number of tenants | Tenant		3
Percentage of rentable square feet		72.00%
Term of lease		15 years
Remaining lease term		14 years
Number of term renewal options | Time		3
Renewal Term (years)		5 years