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INVESTMENTS IN UNCONSOLIDATED ENTITIES (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024 USD ($) board_member	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) board_member	Sep. 30, 2023 USD ($)	Jul. 30, 2024	Dec. 31, 2023 USD ($)
Equity method investments
Total investments in unconsolidated real estate entities	$ 622,996		$ 622,996			$ 598,206
Ownership percentage, threshold (may have less than)	100.00%		100.00%
Management Service
Equity method investments
Management fees	$ 4,000	$ 3,600	$ 11,700	$ 10,900
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	6.70%		6.70%		7.50%
Equity method investment, total voting power	4.00%		4.00%
Number of board members nominated \| board_member	1		1
Gain (loss) on from the issuance of primary shares	$ 8,700		$ 8,700
Unconsolidated Properties \| Ventas Life Science & Healthcare Real Estate Fund
Equity method investments
Total investments in unconsolidated real estate entities	$ 269,694		$ 269,694			$ 264,442
Ownership percentage	20.00%		20.00%			20.10%
Unconsolidated Properties \| Pension Fund Joint Venture
Equity method investments
Total investments in unconsolidated real estate entities	$ 15,511		$ 15,511			$ 22,169
Ownership percentage	25.00%		25.00%			25.00%
Unconsolidated Properties \| Research & Innovation Development Joint Venture
Equity method investments
Total investments in unconsolidated real estate entities	$ 300,694		$ 300,694			$ 275,829
Ownership percentage	53.00%		53.00%			53.00%
Unconsolidated Properties \| Ventas Investment Management platform
Equity method investments
Total investments in unconsolidated real estate entities	$ 585,899		$ 585,899			$ 562,440
Unconsolidated Properties \| Atrium Health And Wake Forest Joint Venture
Equity method investments
Total investments in unconsolidated real estate entities	$ 36,487		$ 36,487			$ 35,137
Ownership percentage	48.50%		48.50%			48.50%
Unconsolidated Properties \| All other
Equity method investments
Total investments in unconsolidated real estate entities	$ 610		$ 610			$ 629
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%		37.50%			37.50%