Real Estate and Other Activities - Schedule of Concentrations of Credit Risk (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Business Acquisition [Line Items]
Total Assets	$ 17,300,956		$ 18,304,844
Total Revenues	271,316	$ 350,211
Total Gross Assets [Member] | Operator Concentration Risk [Member]
Business Acquisition [Line Items]
Total Assets	$ 17,300,956		$ 18,304,844
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	10.50%		11.00%
Total Gross Assets [Member] | Operator Concentration Risk [Member] | Steward [Member]
Business Acquisition [Line Items]
Total Assets	$ 3,218,969		$ 3,518,537
Percentage of concentration risk	18.60%		19.20%
Total Gross Assets [Member] | Operator Concentration Risk [Member] | Circle [Member]
Business Acquisition [Line Items]
Total Assets	$ 2,088,232		$ 2,119,392
Percentage of concentration risk	12.10%		11.60%
Total Gross Assets [Member] | Operator Concentration Risk [Member] | Priory [Member]
Business Acquisition [Line Items]
Total Assets	$ 1,250,626		$ 1,391,005
Percentage of concentration risk	7.20%		7.60%
Total Gross Assets [Member] | Operator Concentration Risk [Member] | Prospect [Member]
Business Acquisition [Line Items]
Total Assets	$ 1,093,094		$ 1,092,974
Percentage of concentration risk	6.30%		6.00%
Total Gross Assets [Member] | Operator Concentration Risk [Member] | Lifepoint Behavioral [Member]
Business Acquisition [Line Items]
Total Assets	$ 813,498		$ 813,527
Percentage of concentration risk	4.70%		4.40%
Total Gross Assets [Member] | Operator Concentration Risk [Member] | Other Operators [Member]
Business Acquisition [Line Items]
Total Assets	$ 7,018,904		$ 7,352,012
Percentage of concentration risk	40.60%		40.20%
Total Gross Assets [Member] | Operator Concentration Risk [Member] | Other Assets by Operator [Member]
Business Acquisition [Line Items]
Total Assets	$ 1,817,633		$ 2,017,397
Total Gross Assets [Member] | Geographic Concentration [Member]
Business Acquisition [Line Items]
Total Assets	$ 17,300,956		$ 18,304,844
Percentage of concentration risk	100.00%		100.00%
Total Gross Assets [Member] | Geographic Concentration [Member] | Texas [Member]
Business Acquisition [Line Items]
Total Assets	$ 1,434,667		$ 1,891,482
Percentage of concentration risk	8.30%		10.30%
Total Gross Assets [Member] | Geographic Concentration [Member] | California [Member]
Business Acquisition [Line Items]
Total Assets	$ 1,248,995		$ 1,252,674
Percentage of concentration risk	7.20%		6.80%
Total Gross Assets [Member] | Geographic Concentration [Member] | Florida [Member]
Business Acquisition [Line Items]
Total Assets	$ 1,271,192		$ 1,348,210
Percentage of concentration risk	7.30%		7.40%
Total Gross Assets [Member] | Geographic Concentration [Member] | Utah [Member]
Business Acquisition [Line Items]
Total Assets	$ 818,704		$ 824,048
Percentage of concentration risk	4.70%		4.50%
Total Gross Assets [Member] | Geographic Concentration [Member] | Massachusetts [Member]
Business Acquisition [Line Items]
Total Assets	$ 759,268		$ 732,550
Percentage of concentration risk	4.40%		4.00%
Total Gross Assets [Member] | Geographic Concentration [Member] | All Other States [Member]
Business Acquisition [Line Items]
Total Assets	$ 3,695,029		$ 3,726,145
Percentage of concentration risk	21.40%		20.40%
Total Gross Assets [Member] | Geographic Concentration [Member] | Total U.S. [Member]
Business Acquisition [Line Items]
Total Assets	$ 10,457,550		$ 11,172,279
Percentage of concentration risk	60.40%		61.00%
Total Gross Assets [Member] | Geographic Concentration [Member] | United Kingdom [Member]
Business Acquisition [Line Items]
Total Assets	$ 4,079,869		$ 4,261,944
Percentage of concentration risk	23.60%		23.30%
Total Gross Assets [Member] | Geographic Concentration [Member] | Switzerland [Member]
Business Acquisition [Line Items]
Total Assets	$ 680,403		$ 735,891
Percentage of concentration risk	3.90%		4.00%
Total Gross Assets [Member] | Geographic Concentration [Member] | Germany [Member]
Business Acquisition [Line Items]
Total Assets	$ 726,940		$ 734,630
Percentage of concentration risk	4.20%		4.00%
Total Gross Assets [Member] | Geographic Concentration [Member] | Spain [Member]
Business Acquisition [Line Items]
Total Assets	$ 250,043		$ 252,529
Percentage of concentration risk	1.50%		1.40%
Total Gross Assets [Member] | Geographic Concentration [Member] | All Other Countries [Member]
Business Acquisition [Line Items]
Total Assets	$ 518,213		$ 527,344
Percentage of concentration risk	3.00%		2.90%
Total Gross Assets [Member] | Geographic Concentration [Member] | Other Domestic Assets [Member]
Business Acquisition [Line Items]
Total Assets	$ 1,229,695		$ 1,397,170
Percentage of concentration risk	7.10%		7.60%
Total Gross Assets [Member] | Geographic Concentration [Member] | Other International Assets [Member]
Business Acquisition [Line Items]
Total Assets	$ 587,938		$ 620,227
Percentage of concentration risk	3.40%		3.40%
Total Gross Assets [Member] | Geographic Concentration [Member] | Total International [Member]
Business Acquisition [Line Items]
Total Assets	$ 6,843,406		$ 7,132,565
Percentage of concentration risk	39.60%		39.00%
Total Gross Assets [Member] | Customer Concentration Risk [Member]
Business Acquisition [Line Items]
Total Assets	$ 17,300,956		$ 18,304,844
Maximum percentage of entity's assets invested on single property	2.00%
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	$ 11,115,957		$ 11,764,151
Percentage of concentration risk	64.30%		64.30%
Total Gross Assets [Member] | Customer Concentration Risk [Member] | Behavioral Health Facilities [Member]
Business Acquisition [Line Items]
Total Assets	$ 2,432,850		$ 2,576,983
Percentage of concentration risk	14.10%		14.10%
Total Gross Assets [Member] | Customer Concentration Risk [Member] | Inpatient Rehabilitation Hospitals [Member]
Business Acquisition [Line Items]
Total Assets	$ 1,436,694		$ 1,445,399
Percentage of concentration risk	8.30%		7.90%
Total Gross Assets [Member] | Customer Concentration Risk [Member] | Long Term Acute Care Hospital [Member]
Business Acquisition [Line Items]
Total Assets	$ 269,235		$ 270,849
Percentage of concentration risk	1.50%		1.50%
Total Gross Assets [Member] | Customer Concentration Risk [Member] | Freestanding ER/Urgent Care Facilities [Member]
Business Acquisition [Line Items]
Total Assets	$ 228,587		$ 230,065
Percentage of concentration risk	1.30%		1.20%
Total Gross Assets [Member] | Customer Concentration Risk [Member] | Other Assets By Facility [Member]
Business Acquisition [Line Items]
Total Assets	$ 1,817,633		$ 2,017,397
Total Gross Assets [Member] | Customer Concentration Risk [Member] | Other Assets [Member]
Business Acquisition [Line Items]
Percentage of concentration risk	10.50%		11.00%
Revenue [Member] | Customer Concentration Risk [Member] | Circle [Member]
Business Acquisition [Line Items]
Percentage of concentration risk		10.00%
Revenue [Member] | Customer Concentration Risk [Member] | Common Spirit [Member]
Business Acquisition [Line Items]
Percentage of concentration risk	10.00%