Real Estate and Other Activities - Schedule of Concentrations of Credit Risk (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Business Acquisition [Line Items]
Total Assets	$ 15,150,428		$ 15,150,428		$ 14,294,594
Total Revenues	$ 240,359	$ 266,560	$ 464,158	$ 537,876
Minimum [Member] | Customer Concentration Risk [Member]
Business Acquisition [Line Items]
Maximum percentage of entity's assets invested on single property	2.00%		2.00%
Total Gross Assets [Member] | Operator Concentration Risk [Member]
Business Acquisition [Line Items]
Total Assets	$ 15,150,428		$ 15,150,428		$ 14,294,594
Percentage of concentration risk			100.00%		100.00%
Total Gross Assets [Member] | Operator Concentration Risk [Member] | Other Assets [Member]
Business Acquisition [Line Items]
Percentage of concentration risk			12.40%		11.80%
Total Gross Assets [Member] | Geographic Concentration [Member]
Business Acquisition [Line Items]
Total Assets	15,150,428		$ 15,150,428		$ 14,294,594
Percentage of concentration risk			100.00%		100.00%
Total Gross Assets [Member] | Geographic Concentration [Member] | Texas [Member]
Business Acquisition [Line Items]
Total Assets	1,415,603		$ 1,415,603		$ 1,394,296
Percentage of concentration risk			9.30%		9.80%
Total Gross Assets [Member] | Geographic Concentration [Member] | California [Member]
Business Acquisition [Line Items]
Total Assets	943,646		$ 943,646		$ 935,470
Percentage of concentration risk			6.30%		6.40%
Total Gross Assets [Member] | Geographic Concentration [Member] | Florida [Member]
Business Acquisition [Line Items]
Total Assets	845,268		$ 845,268		$ 840,876
Percentage of concentration risk			5.60%		5.90%
Total Gross Assets [Member] | Geographic Concentration [Member] | Arizona [Member]
Business Acquisition [Line Items]
Total Assets	384,310		$ 384,310		$ 379,801
Percentage of concentration risk			2.50%		2.70%
Total Gross Assets [Member] | Geographic Concentration [Member] | Ohio [Member]
Business Acquisition [Line Items]
Total Assets	332,337		$ 332,337		$ 327,577
Percentage of concentration risk			2.20%		2.30%
Total Gross Assets [Member] | Geographic Concentration [Member] | All Other States [Member]
Business Acquisition [Line Items]
Total Assets	2,621,863		$ 2,621,863		$ 2,636,587
Percentage of concentration risk			17.30%		18.50%
Total Gross Assets [Member] | Geographic Concentration [Member] | Total U.S. [Member]
Business Acquisition [Line Items]
Total Assets	7,574,248		$ 7,574,248		$ 7,466,093
Percentage of concentration risk			50.00%		52.20%
Total Gross Assets [Member] | Geographic Concentration [Member] | United Kingdom [Member]
Business Acquisition [Line Items]
Total Assets	4,319,502		$ 4,319,502		$ 3,985,672
Percentage of concentration risk			28.50%		27.90%
Total Gross Assets [Member] | Geographic Concentration [Member] | Switzerland [Member]
Business Acquisition [Line Items]
Total Assets	863,343		$ 863,343		$ 719,632
Percentage of concentration risk			5.70%		5.00%
Total Gross Assets [Member] | Geographic Concentration [Member] | Germany [Member]
Business Acquisition [Line Items]
Total Assets	756,490		$ 756,490		$ 672,343
Percentage of concentration risk			5.00%		4.70%
Total Gross Assets [Member] | Geographic Concentration [Member] | Spain [Member]
Business Acquisition [Line Items]
Total Assets	285,895		$ 285,895		$ 247,996
Percentage of concentration risk			1.90%		1.70%
Total Gross Assets [Member] | Geographic Concentration [Member] | All Other Countries [Member]
Business Acquisition [Line Items]
Total Assets	501,899		$ 501,899		$ 464,468
Percentage of concentration risk			3.30%		3.30%
Total Gross Assets [Member] | Geographic Concentration [Member] | Other Domestic Assets [Member]
Business Acquisition [Line Items]
Total Assets	1,031,221		$ 1,031,221		$ 951,486
Percentage of concentration risk			6.80%		6.60%
Total Gross Assets [Member] | Geographic Concentration [Member] | Other International Assets [Member]
Business Acquisition [Line Items]
Total Assets	849,051		$ 849,051		$ 738,390
Percentage of concentration risk			5.60%		5.20%
Total Gross Assets [Member] | Geographic Concentration [Member] | Total International [Member]
Business Acquisition [Line Items]
Total Assets	7,576,180		$ 7,576,180		$ 6,828,501
Percentage of concentration risk			50.00%		47.80%
Total Gross Assets [Member] | Customer Concentration Risk [Member]
Business Acquisition [Line Items]
Total Assets	15,150,428		$ 15,150,428		$ 14,294,594
Percentage of concentration risk			100.00%		100.00%
Total Gross Assets [Member] | Customer Concentration Risk [Member] | General Acute Care Hospitals [Member]
Business Acquisition [Line Items]
Total Assets	8,992,213		$ 8,992,213		$ 8,493,331
Percentage of concentration risk			59.40%		59.40%
Total Gross Assets [Member] | Customer Concentration Risk [Member] | Behavioral Health Facilities [Member]
Business Acquisition [Line Items]
Total Assets	2,506,704		$ 2,506,704		$ 2,376,460
Percentage of concentration risk			16.50%		16.70%
Total Gross Assets [Member] | Customer Concentration Risk [Member] | Post Acute Care Facilities [Member]
Business Acquisition [Line Items]
Total Assets	1,655,572		$ 1,655,572		$ 1,617,596
Percentage of concentration risk			10.90%		11.30%
Total Gross Assets [Member] | Customer Concentration Risk [Member] | Freestanding ER/Urgent Care Facilities [Member]
Business Acquisition [Line Items]
Total Assets	115,667		$ 115,667		$ 117,331
Percentage of concentration risk			0.80%		0.80%
Total Gross Assets [Member] | Customer Concentration Risk [Member] | Other Assets By Facility [Member]
Business Acquisition [Line Items]
Total Assets	1,880,272		$ 1,880,272		$ 1,689,876
Total Gross Assets [Member] | Customer Concentration Risk [Member] | Other Assets [Member]
Business Acquisition [Line Items]
Percentage of concentration risk			12.40%		11.80%
Total Gross Assets [Member] | Circle [Member] | Operator Concentration Risk [Member]
Business Acquisition [Line Items]
Total Assets	2,195,038		$ 2,195,038		$ 2,026,778
Percentage of concentration risk			14.50%		14.20%
Total Gross Assets [Member] | Priory [Member] | Operator Concentration Risk [Member]
Business Acquisition [Line Items]
Total Assets	1,340,466		$ 1,340,466		$ 1,233,462
Percentage of concentration risk			8.80%		8.60%
Total Gross Assets [Member] | Healthcare Systems of America [Member] | Operator Concentration Risk [Member]
Business Acquisition [Line Items]
Total Assets	1,204,109		$ 1,204,109		$ 1,187,006
Percentage of concentration risk			7.90%		8.30%
Total Gross Assets [Member] | Swiss Medical Network [Member] | Operator Concentration Risk [Member]
Business Acquisition [Line Items]
Total Assets	863,343		$ 863,343		$ 719,632
Percentage of concentration risk			5.70%		5.10%
Total Gross Assets [Member] | Lifepoint Behavioral [Member] | Operator Concentration Risk [Member]
Business Acquisition [Line Items]
Total Assets	816,943		$ 816,943		$ 813,584
Percentage of concentration risk			5.40%		5.70%
Total Gross Assets [Member] | Other Operators [Member] | Operator Concentration Risk [Member]
Business Acquisition [Line Items]
Total Assets	6,850,257		$ 6,850,257		$ 6,624,256
Percentage of concentration risk			45.30%		46.30%
Total Gross Assets [Member] | Other Assets by Operator [Member] | Operator Concentration Risk [Member]
Business Acquisition [Line Items]
Total Assets	$ 1,880,272		$ 1,880,272		$ 1,689,876
Revenue [Member] | Operator Concentration Risk [Member]
Business Acquisition [Line Items]
Percentage of concentration risk	100.00%	100.00%	100.00%	100.00%
Total Revenues	$ 240,359	$ 266,560	$ 464,158	$ 537,876
Revenue [Member] | Geographic Concentration [Member]
Business Acquisition [Line Items]
Percentage of concentration risk	100.00%	100.00%
Total Revenues	$ 240,359	$ 266,560
Revenue [Member] | Geographic Concentration [Member] | Total U.S. [Member]
Business Acquisition [Line Items]
Percentage of concentration risk	52.40%	60.20%
Total Revenues	$ 126,067	$ 160,461
Revenue [Member] | Geographic Concentration [Member] | United Kingdom [Member]
Business Acquisition [Line Items]
Percentage of concentration risk	39.10%	33.10%
Total Revenues	$ 93,924	$ 88,164
Revenue [Member] | Geographic Concentration [Member] | All Other Countries [Member]
Business Acquisition [Line Items]
Percentage of concentration risk	8.50%	6.70%
Total Revenues	$ 20,368	$ 17,935
Revenue [Member] | Customer Concentration Risk [Member]
Business Acquisition [Line Items]
Percentage of concentration risk	100.00%	100.00%
Total Revenues	$ 240,359	$ 266,560
Revenue [Member] | Customer Concentration Risk [Member] | General Acute Care Hospitals [Member]
Business Acquisition [Line Items]
Percentage of concentration risk	61.40%	65.00%
Total Revenues	$ 147,648	$ 173,133
Revenue [Member] | Customer Concentration Risk [Member] | Behavioral Health Facilities [Member]
Business Acquisition [Line Items]
Percentage of concentration risk	22.30%	19.90%
Total Revenues	$ 53,545	$ 52,957
Revenue [Member] | Customer Concentration Risk [Member] | Post Acute Care Facilities [Member]
Business Acquisition [Line Items]
Percentage of concentration risk	15.50%	12.90%
Total Revenues	$ 37,176	$ 34,493
Revenue [Member] | Customer Concentration Risk [Member] | Freestanding ER/Urgent Care Facilities [Member]
Business Acquisition [Line Items]
Percentage of concentration risk	0.80%	2.20%
Total Revenues	$ 1,990	$ 5,977
Revenue [Member] | Circle [Member] | Operator Concentration Risk [Member]
Business Acquisition [Line Items]
Percentage of concentration risk	22.40%	19.00%	22.50%	18.90%
Total Revenues	$ 53,725	$ 50,555	$ 104,436	$ 101,567
Revenue [Member] | Priory [Member] | Operator Concentration Risk [Member]
Business Acquisition [Line Items]
Percentage of concentration risk	11.00%	9.20%	11.10%	9.40%
Total Revenues	$ 26,456	$ 24,633	$ 51,397	$ 50,515
Revenue [Member] | Other Operators [Member] | Operator Concentration Risk [Member]
Business Acquisition [Line Items]
Percentage of concentration risk	66.60%	71.80%	66.40%	71.70%
Total Revenues	$ 160,178	$ 191,372	$ 308,325	$ 385,794