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INVESTMENTS IN UNCONSOLIDATED ENTITIES (Details) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	May 31, 2023 USD ($)	Sep. 30, 2023 USD ($) board_member	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) board_member	Sep. 30, 2022 USD ($)	Apr. 30, 2023	Dec. 31, 2022 USD ($)
Equity method investments
Total investments in unconsolidated real estate entities		$ 579,172		$ 579,172			$ 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	$ 4,200	$ 10,900	$ 11,500
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%		9.80%
Number of board members appointed \| board_member		1		1
Ownership percentage sold	0.24
Unconsolidated Properties \| Ventas Life Science & Healthcare Real Estate Fund
Equity method investments
Ownership percentage		20.60%		20.60%			21.00%
Total investments in unconsolidated real estate entities		$ 268,514		$ 268,514			$ 263,979
Unconsolidated Properties \| Pension Fund Joint Venture
Equity method investments
Ownership percentage		23.60%		23.60%			22.90%
Total investments in unconsolidated real estate entities		$ 27,052		$ 27,052			$ 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		$ 260,526		$ 260,526			$ 284,962
Unconsolidated Properties \| Ventas Investment Management platform
Equity method investments
Total investments in unconsolidated real estate entities		$ 556,092		$ 556,092			$ 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		$ 22,443		$ 22,443			$ 5,403
Unconsolidated Properties \| All other
Equity method investments
Total investments in unconsolidated real estate entities		$ 637		$ 637			$ 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							37.50%