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INVESTMENTS IN UNCONSOLIDATED ENTITIES (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($) board_member	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)
Equity method investments
Total investments in unconsolidated real estate entities	$ 541,914		$ 523,465
Management Service
Equity method investments
Management fees	$ 3,500	$ 2,700
Atria
Equity method investments
Ownership percentage	34.00%
Number of board members appointed \| board_member	2
Ardent
Equity method investments
Ownership percentage	9.80%
Number of board members appointed \| board_member	1
Unconsolidated Properties \| Ventas Life Science & Healthcare Real Estate Fund
Equity method investments
Ownership percentage	21.10%		21.10%
Total investments in unconsolidated real estate entities	$ 264,675		$ 267,475
Unconsolidated Properties \| Pension Fund Joint Venture
Equity method investments
Ownership percentage	22.90%		22.90%
Total investments in unconsolidated real estate entities	$ 28,248		$ 29,192
Unconsolidated Properties \| Research & Innovation Development Joint Venture
Equity method investments
Ownership percentage	51.10%		51.00%
Total investments in unconsolidated real estate entities	$ 244,115		$ 221,363
Unconsolidated Properties \| Ventas Investment Management Platform
Equity method investments
Total investments in unconsolidated real estate entities	537,038		518,030
Unconsolidated Properties \| All other
Equity method investments
Total investments in unconsolidated real estate entities	$ 4,876		$ 5,435
Unconsolidated Properties \| All other \| Minimum
Equity method investments
Ownership percentage	34.00%		34.00%
Unconsolidated Properties \| All other \| Maximum
Equity method investments
Ownership percentage	50.00%		50.00%