Segment Reporting - Other Segment Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Segment Reporting Information [Line Items]
Compensation	$ 831,871	$ 612,642
Utilities	103,902	79,691
Food	71,805	55,625
Repairs & maintenance	64,555	49,265
Property taxes	86,144	77,470
Other segment expenses	304,113	222,220
Total property operating expenses	1,462,390	1,096,913
Operating Segments | Seniors Housing Operating
Segment Reporting Information [Line Items]
Compensation	818,164	598,618
Utilities	89,927	67,640
Food	71,805	55,625
Repairs & maintenance	52,983	38,810
Property taxes	61,933	50,507
Other segment expenses	289,872	208,147
Total property operating expenses	1,384,684	1,019,347
Operating Segments | Triple-net
Segment Reporting Information [Line Items]
Compensation	12	20
Utilities	94	89
Food	0	0
Repairs & maintenance	29	30
Property taxes	5,967	8,150
Other segment expenses	2,716	2,528
Total property operating expenses	8,818	10,817
Operating Segments | Outpatient Medical
Segment Reporting Information [Line Items]
Compensation	13,695	14,004
Utilities	13,881	11,962
Food	0	0
Repairs & maintenance	11,543	10,425
Property taxes	18,244	18,813
Other segment expenses	7,243	7,259
Total property operating expenses	64,606	62,463
Non-segment/Corporate
Segment Reporting Information [Line Items]
Compensation	0	0
Utilities	0	0
Food	0	0
Repairs & maintenance	0	0
Property taxes	0	0
Other segment expenses	4,282	4,286
Total property operating expenses	$ 4,282	$ 4,286