Segment Reporting - Other Segment Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Segment Reporting Information [Line Items]
Compensation	$ 1,251,534	$ 831,871
Utilities	125,002	103,902
Food	102,531	71,805
Repairs and maintenance	82,601	64,555
Property taxes	83,731	86,144
Other segment expenses	410,021	304,113
Total property operating expenses	2,055,420	1,462,390
Operating Segments | Seniors Housing Operating
Segment Reporting Information [Line Items]
Compensation	1,248,229	818,164
Utilities	121,594	89,927
Food	102,531	71,805
Repairs and maintenance	79,672	52,983
Property taxes	72,697	61,933
Other segment expenses	390,638	289,872
Total property operating expenses	2,015,361	1,384,684
Operating Segments | Triple-net
Segment Reporting Information [Line Items]
Compensation	28	12
Utilities	83	94
Food	0	0
Repairs and maintenance	129	29
Property taxes	5,803	5,967
Other segment expenses	1,763	2,716
Total property operating expenses	7,806	8,818
Operating Segments | Outpatient Medical
Segment Reporting Information [Line Items]
Compensation	3,277	13,695
Utilities	3,325	13,881
Food	0	0
Repairs and maintenance	2,800	11,543
Property taxes	5,231	18,244
Other segment expenses	3,200	7,243
Total property operating expenses	17,833	64,606
Non-segment/Corporate
Segment Reporting Information [Line Items]
Compensation	0	0
Utilities	0	0
Food	0	0
Repairs and maintenance	0	0
Property taxes	0	0
Other segment expenses	14,420	4,282
Total property operating expenses	$ 14,420	$ 4,282