SEGMENT INFORMATION - Capital Expenditures (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information
Total capital expenditures	$ 162,576	$ 159,871	$ 404,633	$ 721,048
Gain on foreclosure of real estate	0	0	29,127	0
Operating Segments | SHOP
Segment Reporting Information
Total capital expenditures	99,115	114,453	254,795	313,396
Operating Segments | Outpatient Medical and Research Portfolio
Segment Reporting Information
Total capital expenditures	62,455	44,150	143,073	403,976
Operating Segments | Triple-Net Leased Properties
Segment Reporting Information
Total capital expenditures	$ 1,006	$ 1,268	$ 6,765	$ 3,676