Real Property Acquisitions and Development - Summary of Real Property Investment Activity by Segment (Details) - USD ($) shares in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Business Acquisition [Line Items]
Land and land improvements	$ 72,323	$ 156,996
Buildings and improvements	380,651	1,455,314
Acquired lease intangibles	40,060	104,541
Construction in progress	0	108,141
Right of use assets, net	927	4,021
Total net real estate assets	493,961	1,829,013
Receivables and other assets	2,447	6,351
Total assets acquired	496,408	1,835,364
Secured debt	(62,720)	(219,067)
Lease liabilities	(953)	(3,852)
Accrued expenses and other liabilities	(8,641)	(12,330)
Total liabilities acquired	(72,314)	(235,249)
Noncontrolling interests	0	(102,553)
Non-cash acquisition related activity	0	(25,795)
Cash disbursed for acquisitions	424,094	1,471,767
Construction in progress additions	510,930	299,319
Less: Capitalized interest	(22,205)	(11,866)
Accruals	(14,610)	(1,026)
Cash disbursed for construction in progress	474,115	286,427
Capital improvements to existing properties	204,978	200,069
Total cash invested in real property, net of cash acquired	1,103,187	1,958,263
Cash acquired from acquisition		$ 5,491
New issues (in shares)		1,145
Seniors Housing Operating
Business Acquisition [Line Items]
Land and land improvements	4,426	$ 130,282
Buildings and improvements	50,172	1,249,982
Acquired lease intangibles	970	77,705
Construction in progress	0	108,141
Right of use assets, net	0	169
Total net real estate assets	55,568	1,566,279
Receivables and other assets	2,089	6,091
Total assets acquired	57,657	1,572,370
Secured debt	(21,767)	(219,067)
Lease liabilities	0	0
Accrued expenses and other liabilities	(570)	(11,937)
Total liabilities acquired	(22,337)	(231,004)
Noncontrolling interests	0	(101,885)
Non-cash acquisition related activity	0	(25,795)
Cash disbursed for acquisitions	35,320	1,213,686
Construction in progress additions	295,120	229,044
Less: Capitalized interest	(16,761)	(9,305)
Accruals	746	(3,479)
Cash disbursed for construction in progress	279,105	216,260
Capital improvements to existing properties	165,187	146,052
Total cash invested in real property, net of cash acquired	479,612	1,575,998
Triple-net
Business Acquisition [Line Items]
Land and land improvements	7,370	0
Buildings and improvements	74,289	171
Acquired lease intangibles	0	0
Construction in progress	0	0
Right of use assets, net	0	0
Total net real estate assets	81,659	171
Receivables and other assets	0	0
Total assets acquired	81,659	171
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	81,659	167
Construction in progress additions	25,646	45,939
Less: Capitalized interest	(2,416)	(2,031)
Accruals	(9,384)	0
Cash disbursed for construction in progress	13,846	43,908
Capital improvements to existing properties	11,784	25,016
Total cash invested in real property, net of cash acquired	107,289	69,091
Outpatient Medical
Business Acquisition [Line Items]
Land and land improvements	60,527	26,714
Buildings and improvements	256,190	205,161
Acquired lease intangibles	39,090	26,836
Construction in progress	0	0
Right of use assets, net	927	3,852
Total net real estate assets	356,734	262,563
Receivables and other assets	358	260
Total assets acquired	357,092	262,823
Secured debt	(40,953)	0
Lease liabilities	(953)	(3,852)
Accrued expenses and other liabilities	(8,071)	(393)
Total liabilities acquired	(49,977)	(4,245)
Noncontrolling interests	0	(664)
Non-cash acquisition related activity	0	0
Cash disbursed for acquisitions	307,115	257,914
Construction in progress additions	190,164	24,336
Less: Capitalized interest	(3,028)	(530)
Accruals	(5,972)	2,453
Cash disbursed for construction in progress	181,164	26,259
Capital improvements to existing properties	28,007	29,001
Total cash invested in real property, net of cash acquired	$ 516,286	$ 313,174