INVESTMENT IN UNCONSOLIDATED ENTITIES - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($) board_member property	Dec. 31, 2024 USD ($) property	Dec. 31, 2023 USD ($)	Jul. 30, 2024	Jun. 30, 2024
Equity method investments
Goodwill	$ 1,046,072	$ 1,044,915
Asset acquisition, consideration transferred	$ 2,300,000	1,900,000
Segment Properties | property	1,374
Proceeds from real estate disposals	$ 213,161	$ 329,094	$ 399,534
Ventas fund
Equity method investments
Asset acquisition, consideration transferred	$ 279,500
Pension Fund Joint Venture | Seniors Housing Communities
Equity method investments
Segment Properties | property	5
Proceeds from real estate disposals	$ 302,500
Senior Housing Community
Equity method investments
Number of real estate properties acquired | property	52	50
Senior Housing Community | Ventas fund
Equity method investments
Number of real estate properties acquired | property	3
Ardent, Outpatient Medical Buildings | Ventas fund
Equity method investments
Number of real estate properties acquired | property	2
Outpatient medical and research portfolio (OM&R)
Equity method investments
Goodwill	$ 466,967
Atria
Equity method investments
Ownership interests	34.00%
Number of board of directors members appointed | board_member	2
Ardent
Equity method investments
Ownership interests	6.60%			6.70%	7.50%
Number Of Board Members Nominated | board_member	1
Equity Method Investment, Voting Rights, Percentage	4.00%
Gain (Loss) on Sale of Previously Unissued Stock by Equity Investee		$ 8,700
Management Service
Equity method investments
Revenue from contracts with customers	$ 15,700	$ 15,500	$ 14,700