CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Common stock:	Additional paid-in-capital:	Treasury stock:	Accumulated deficit:	Noncontrolling interest:
Balance at beginning of period at Dec. 31, 2022	$ 584,153	$ 1,978	$ 4,332,302	$ (102,774)	$ (3,648,901)	$ 1,548
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock and restricted stock units, net		16	(16)
Shares withheld for employee taxes		(6)	(1,834)
Compensation expense related to restricted stock grants			3,104
Net income (loss) attributable to Brookdale Senior Living Inc. common stockholders	(44,549)				(44,549)
Net income (loss) attributable to noncontrolling interest	(44,563)					(14)
Balance at end of period at Mar. 31, 2023	540,854	$ 1,988	4,333,556	(102,774)	(3,693,450)	1,534
Balance at beginning of period (in shares) at Dec. 31, 2022		187,249,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock and restricted stock units, net (in shares)		1,545,000
Shares withheld for employee taxes (in shares)		(559,000)
Balances at end of period (in shares) at Mar. 31, 2023		188,235,000
Balance at beginning of period at Dec. 31, 2023	405,153	$ 1,988	4,342,362	(102,774)	(3,837,912)	1,489
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued for settlement of prepaid stock purchase contracts		35	(35)
Restricted stock and restricted stock units, net		18	(18)
Shares withheld for employee taxes		(6)	(3,391)
Compensation expense related to restricted stock grants			3,273
Net income (loss) attributable to Brookdale Senior Living Inc. common stockholders	(29,566)				(29,566)
Net income (loss) attributable to noncontrolling interest	(29,581)					(15)
Balance at end of period at Mar. 31, 2024	$ 375,448	$ 2,035	$ 4,342,191	$ (102,774)	$ (3,867,478)	$ 1,474
Balance at beginning of period (in shares) at Dec. 31, 2023	188,253,301	188,253,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued for settlement of prepaid stock purchase contracts (in shares)		3,556,877
Restricted stock and restricted stock units, net (in shares)		1,778,000
Shares withheld for employee taxes (in shares)		(575,000)
Balances at end of period (in shares) at Mar. 31, 2024	193,012,561	193,013,000