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INVESTMENTS IN UNCONSOLIDATED ENTITIES (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($) board_member	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) board_member	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Equity method investments
Total investments in unconsolidated real estate entities	$ 547,766		$ 547,766		$ 523,465
Management Service
Equity method investments
Management fees	$ 4,200	$ 3,200	$ 11,500	$ 8,900
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	9.80%		9.80%
Number of board members appointed \| board_member	1		1
Unconsolidated Properties \| Ventas Life Science & Healthcare Real Estate Fund
Equity method investments
Ownership percentage	20.00%		20.00%		21.10%
Total investments in unconsolidated real estate entities	$ 258,540		$ 258,540		$ 267,475
Unconsolidated Properties \| Pension Fund Joint Venture
Equity method investments
Ownership percentage	22.90%		22.90%		22.90%
Total investments in unconsolidated real estate entities	$ 26,422		$ 26,422		$ 29,192
Unconsolidated Properties \| Research & Innovation Development Joint Venture
Equity method investments
Ownership percentage	51.50%		51.50%		51.00%
Total investments in unconsolidated real estate entities	$ 261,725		$ 261,725		$ 221,363
Unconsolidated Properties \| Ventas Investment Management Platform
Equity method investments
Total investments in unconsolidated real estate entities	546,687		546,687		518,030
Unconsolidated Properties \| All other
Equity method investments
Total investments in unconsolidated real estate entities	$ 1,079		$ 1,079		$ 5,435
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%		50.00%