Real Property Acquisitions and Development - Construction Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Development projects:
Total development projects	$ 795,556	$ 272,573	$ 265,555
Expansion projects	71,250	18,280	5,292
Total construction in progress conversions	866,806	290,853	270,847
Seniors Housing Operating
Development projects:
Total development projects	463,644	227,796	117,386
Triple-net
Development projects:
Total development projects	141,142	0	22,990
Outpatient Medical
Development projects:
Total development projects	$ 190,770	$ 44,777	$ 125,179