Real Property Acquisitions and Development - Estimated Fair Value of Allocated Purchase Price of Asset and Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Business Acquisition [Line Items]
Land and land improvements	$ 44,137	$ 27,667
Buildings and improvements	533,925	184,423
Acquired lease intangibles	48,344	1,778
Right of use assets, net	3,852	0
Total net real estate assets	630,258	213,868
Receivables and other assets	1,630	34
Total assets acquired	631,888	213,902
Lease liabilities	(3,852)	0
Accrued expenses and other liabilities	(4,154)	(8,739)
Total liabilities acquired	(8,006)	(8,739)
Noncontrolling interests	(20,352)	(2,056)
Non-cash acquisition related activity	2,120	0
Cash disbursed for acquisitions	601,410	203,107
Construction in progress additions	143,805	77,783
Less: Capitalized interest	(5,479)	(4,496)
Accruals	(185)	318
Cash disbursed for construction in progress	138,141	73,605
Capital improvements to existing properties	90,229	28,780
Total cash invested in real property, net of cash acquired	829,780	305,492
Seniors Housing Operating
Business Acquisition [Line Items]
Land and land improvements	43,897	1,240
Buildings and improvements	402,342	3,491
Acquired lease intangibles	31,366	339
Right of use assets, net	0	0
Total net real estate assets	477,605	5,070
Receivables and other assets	1,630	34
Total assets acquired	479,235	5,104
Lease liabilities	0	0
Accrued expenses and other liabilities	(4,154)	0
Total liabilities acquired	(4,154)	0
Noncontrolling interests	(20,348)	0
Non-cash acquisition related activity	2,120	0
Cash disbursed for acquisitions	452,613	5,104
Construction in progress additions	113,407	38,373
Less: Capitalized interest	(4,179)	(2,980)
Accruals	(1,963)	7
Cash disbursed for construction in progress	107,265	35,400
Capital improvements to existing properties	68,612	(3,159)
Total cash invested in real property, net of cash acquired	628,490	37,345
Triple-net
Business Acquisition [Line Items]
Land and land improvements	0	24,154
Buildings and improvements	171	170,362
Acquired lease intangibles	0	0
Right of use assets, net	0	0
Total net real estate assets	171	194,516
Receivables and other assets	0	0
Total assets acquired	171	194,516
Lease liabilities	0	0
Accrued expenses and other liabilities	0	(8,703)
Total liabilities acquired	0	(8,703)
Noncontrolling interests	(4)	(2,056)
Non-cash acquisition related activity	0	0
Cash disbursed for acquisitions	167	183,757
Construction in progress additions	20,756	31,809
Less: Capitalized interest	(1,089)	(524)
Accruals	0	0
Cash disbursed for construction in progress	19,667	31,285
Capital improvements to existing properties	8,294	25,295
Total cash invested in real property, net of cash acquired	28,128	240,337
Outpatient Medical
Business Acquisition [Line Items]
Land and land improvements	240	2,273
Buildings and improvements	131,412	10,570
Acquired lease intangibles	16,978	1,439
Right of use assets, net	3,852	0
Total net real estate assets	152,482	14,282
Receivables and other assets	0	0
Total assets acquired	152,482	14,282
Lease liabilities	(3,852)	0
Accrued expenses and other liabilities	0	(36)
Total liabilities acquired	(3,852)	(36)
Noncontrolling interests	0	0
Non-cash acquisition related activity	0	0
Cash disbursed for acquisitions	148,630	14,246
Construction in progress additions	9,642	7,601
Less: Capitalized interest	(211)	(992)
Accruals	1,778	311
Cash disbursed for construction in progress	11,209	6,920
Capital improvements to existing properties	13,323	6,644
Total cash invested in real property, net of cash acquired	$ 173,162	$ 27,810