Real Property Acquisitions and Development - Construction Activity (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Segment Reporting Information [Line Items]
Total development projects	$ 36,063	$ 73,458
Expansion projects	17,245	0
Total construction in progress conversions	53,308	73,458
Seniors Housing Operating
Segment Reporting Information [Line Items]
Total development projects	26,712	73,458
Outpatient Medical
Segment Reporting Information [Line Items]
Total development projects	$ 9,351	$ 0