Real Property Acquisitions and Development - Summary of Real Property Investment Activity by Segment (Details) - USD ($) shares in Thousands, $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Business Acquisition [Line Items]
Land and land improvements	$ 189,838	$ 265,580
Buildings and improvements	1,156,206	2,238,831
Acquired lease intangibles	71,553	143,027
Construction in progress	165,934	108,141
Right of use assets, net	17,466	4,021
Total net real estate assets	1,600,997	2,759,600
Receivables and other assets	17,334	10,870
Total assets acquired	1,618,331	2,770,470
Secured debt	(333,113)	(219,067)
Lease liabilities	(17,492)	(3,852)
Accrued expenses and other liabilities	(21,657)	(112,667)
Total liabilities acquired	(372,262)	(335,586)
Noncontrolling interests	(775)	(116,091)
Non-cash acquisition related activity	(171,667)	(25,795)
Cash disbursed for acquisitions	1,073,627	2,292,998
Construction in progress additions	773,713	482,551
Less: Capitalized interest	(36,152)	(20,729)
Accruals	(6,849)	1,643
Cash disbursed for construction in progress	730,712	463,465
Capital improvements to existing properties	334,090	315,835
Total cash invested in real property, net of cash acquired	2,138,429	3,072,298
Cash acquired from acquisition		$ 6,431
New issues (in shares)		1,227
Seniors Housing Operating
Business Acquisition [Line Items]
Land and land improvements	58,049	$ 199,892
Buildings and improvements	411,273	1,988,999
Acquired lease intangibles	25,617	109,049
Construction in progress	165,934	108,141
Right of use assets, net	16,539	169
Total net real estate assets	677,412	2,406,250
Receivables and other assets	16,789	10,410
Total assets acquired	694,201	2,416,660
Secured debt	(292,160)	(219,067)
Lease liabilities	(16,539)	0
Accrued expenses and other liabilities	(10,825)	(111,373)
Total liabilities acquired	(319,524)	(330,440)
Noncontrolling interests	0	(115,112)
Non-cash acquisition related activity	(171,667)	(25,795)
Cash disbursed for acquisitions	203,010	1,945,313
Construction in progress additions	450,205	343,000
Less: Capitalized interest	(28,289)	(16,464)
Accruals	3,447	(2,809)
Cash disbursed for construction in progress	425,363	323,727
Capital improvements to existing properties	261,935	232,618
Total cash invested in real property, net of cash acquired	890,308	2,501,658
Triple-net
Business Acquisition [Line Items]
Land and land improvements	58,797	0
Buildings and improvements	430,041	172
Acquired lease intangibles	0	0
Construction in progress	0	0
Right of use assets, net	0	0
Total net real estate assets	488,838	172
Receivables and other assets	0	0
Total assets acquired	488,838	172
Secured debt	0	0
Lease liabilities	0	0
Accrued expenses and other liabilities	0	0
Total liabilities acquired	0	0
Noncontrolling interests	0	(4)
Non-cash acquisition related activity	0	0
Cash disbursed for acquisitions	488,838	168
Construction in progress additions	25,646	64,091
Less: Capitalized interest	(2,416)	(3,088)
Accruals	(2,692)	0
Cash disbursed for construction in progress	20,538	61,003
Capital improvements to existing properties	17,933	39,526
Total cash invested in real property, net of cash acquired	527,309	100,697
Outpatient Medical
Business Acquisition [Line Items]
Land and land improvements	72,992	65,688
Buildings and improvements	314,892	249,660
Acquired lease intangibles	45,936	33,978
Construction in progress	0	0
Right of use assets, net	927	3,852
Total net real estate assets	434,747	353,178
Receivables and other assets	545	460
Total assets acquired	435,292	353,638
Secured debt	(40,953)	0
Lease liabilities	(953)	(3,852)
Accrued expenses and other liabilities	(10,832)	(1,294)
Total liabilities acquired	(52,738)	(5,146)
Noncontrolling interests	(775)	(975)
Non-cash acquisition related activity	0	0
Cash disbursed for acquisitions	381,779	347,517
Construction in progress additions	297,862	75,460
Less: Capitalized interest	(5,447)	(1,177)
Accruals	(7,604)	4,452
Cash disbursed for construction in progress	284,811	78,735
Capital improvements to existing properties	54,222	43,691
Total cash invested in real property, net of cash acquired	$ 720,812	$ 469,943