Real Property Acquisitions and Development - Estimated Fair Value of Allocated Purchase Price of Asset and Liabilities (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Business Acquisition [Line Items]
Land and land improvements	$ 156,996	$ 86,220
Buildings and improvements	1,455,314	588,738
Acquired lease intangibles	104,541	16,953
Construction in progress	108,141	0
Right of use assets, net	4,021	0
Total net real estate assets	1,829,013	691,911
Receivables and other assets	6,351	642
Total assets acquired	1,835,364	692,553
Secured debt	(219,067)	0
Lease liabilities	(3,852)	0
Accrued expenses and other liabilities	(12,330)	(11,892)
Total liabilities acquired	(235,249)	(11,892)
Noncontrolling interests	(102,553)	(19,376)
Non-cash acquisition related activity	(25,795)	0
Cash disbursed for acquisitions	1,471,767	661,285
Construction in progress additions	299,319	153,383
Less: Capitalized interest	(11,866)	(9,358)
Accruals	(1,026)	319
Cash disbursed for construction in progress	286,427	144,344
Capital improvements to existing properties	200,069	94,483
Total cash invested in real property, net of cash acquired	1,958,263	900,112
Cash acquired from acquisition	$ 5,491	301
New issues (in shares)	1,145,000
Seniors Housing Operating
Business Acquisition [Line Items]
Land and land improvements	$ 130,282	25,636
Buildings and improvements	1,249,982	167,791
Acquired lease intangibles	77,705	10,679
Construction in progress	108,141	0
Right of use assets, net	169	0
Total net real estate assets	1,566,279	204,106
Receivables and other assets	6,091	634
Total assets acquired	1,572,370	204,740
Secured debt	(219,067)	0
Lease liabilities	0	0
Accrued expenses and other liabilities	(11,937)	(2,923)
Total liabilities acquired	(231,004)	(2,923)
Noncontrolling interests	(101,885)	(2,597)
Non-cash acquisition related activity	(25,795)	0
Cash disbursed for acquisitions	1,213,686	199,220
Construction in progress additions	229,044	93,108
Less: Capitalized interest	(9,305)	(6,014)
Accruals	(3,479)	8
Cash disbursed for construction in progress	216,260	87,102
Capital improvements to existing properties	146,052	64,438
Total cash invested in real property, net of cash acquired	1,575,998	350,760
Triple-net
Business Acquisition [Line Items]
Land and land improvements	0	30,849
Buildings and improvements	171	268,210
Acquired lease intangibles	0	0
Construction in progress	0	0
Right of use assets, net	0	0
Total net real estate assets	171	299,059
Receivables and other assets	0	0
Total assets acquired	171	299,059
Secured debt	0	0
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	288,300
Construction in progress additions	45,939	46,904
Less: Capitalized interest	(2,031)	(1,238)
Accruals	0	0
Cash disbursed for construction in progress	43,908	45,666
Capital improvements to existing properties	25,016	15,568
Total cash invested in real property, net of cash acquired	69,091	349,534
Outpatient Medical
Business Acquisition [Line Items]
Land and land improvements	26,714	29,735
Buildings and improvements	205,161	152,737
Acquired lease intangibles	26,836	6,274
Construction in progress	0	0
Right of use assets, net	3,852	0
Total net real estate assets	262,563	188,746
Receivables and other assets	260	8
Total assets acquired	262,823	188,754
Secured debt	0	0
Lease liabilities	(3,852)	0
Accrued expenses and other liabilities	(393)	(266)
Total liabilities acquired	(4,245)	(266)
Noncontrolling interests	(664)	(14,723)
Non-cash acquisition related activity	0	0
Cash disbursed for acquisitions	257,914	173,765
Construction in progress additions	24,336	13,371
Less: Capitalized interest	(530)	(2,106)
Accruals	2,453	311
Cash disbursed for construction in progress	26,259	11,576
Capital improvements to existing properties	29,001	14,477
Total cash invested in real property, net of cash acquired	$ 313,174	$ 199,818