Real Property Acquisitions and Development - Construction Activity (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information [Line Items]
Total construction in progress conversions	$ 182,421	$ 198,446
Seniors Housing Operating
Segment Reporting Information [Line Items]
Total development projects	182,421	58,844
Triple-net
Segment Reporting Information [Line Items]
Total development projects	0	22,990
Outpatient Medical
Segment Reporting Information [Line Items]
Total development projects	$ 0	$ 116,612