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INVESTMENTS IN UNCONSOLIDATED ENTITIES (Details) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	May 31, 2023 USD ($) board_member	Jun. 30, 2023 USD ($) board_member	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) board_member	Jun. 30, 2022 USD ($)	Apr. 30, 2023	Dec. 31, 2022 USD ($)
Equity method investments
Total investments in unconsolidated real estate entities		$ 626,230		$ 626,230			$ 579,949
Proceeds from Sale of Equity Method Investments	$ 50,100
Equity Method Investment, Realized Gain (Loss) on Disposal		33,500		33,500
Management Service
Equity method investments
Management fees		$ 3,600	$ 3,800	$ 7,200	$ 7,300
Atria
Equity method investments
Ownership percentage		34.00%		34.00%
Number of board members appointed \| board_member		2		2
Ardent
Equity method investments
Ownership percentage	7.50%	7.50%		7.50%		9.80%
Number of board members appointed \| board_member	1
Ownership percentage sold	0.24
Unconsolidated Properties \| Ventas Life Science & Healthcare Real Estate Fund
Equity method investments
Ownership percentage		21.00%		21.00%			21.00%
Total investments in unconsolidated real estate entities		$ 258,200		$ 258,200			$ 263,979
Unconsolidated Properties \| Pension Fund Joint Venture
Equity method investments
Ownership percentage		23.50%		23.50%			22.90%
Total investments in unconsolidated real estate entities		$ 26,934		$ 26,934			$ 25,028
Unconsolidated Properties \| Research & Innovation Development Joint Venture
Equity method investments
Ownership percentage		51.40%		51.40%			51.00%
Total investments in unconsolidated real estate entities		$ 328,535		$ 328,535			$ 284,962
Unconsolidated Properties \| Ventas Investment Management Platform
Equity method investments
Total investments in unconsolidated real estate entities		$ 613,669		$ 613,669			$ 573,969
Unconsolidated Properties \| Atrium Health And Wake Forest Joint Venture
Equity method investments
Ownership percentage		48.50%		48.50%			48.50%
Total investments in unconsolidated real estate entities		$ 14,877		$ 14,877			$ 5,403
Unconsolidated Properties \| All other
Equity method investments
Total investments in unconsolidated real estate entities		$ (2,316)		$ (2,316)			$ 577
Unconsolidated Properties \| All other \| Minimum
Equity method investments
Ownership percentage		34.00%		34.00%			34.00%
Unconsolidated Properties \| All other \| Maximum
Equity method investments
Ownership percentage		38.00%		38.00%