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, 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		67	(67)
Shares issued for warrant exercise		9	(9)
Restricted stock and restricted stock units, net		19	(19)
Shares withheld for employee taxes		(6)	(3,399)
Compensation expense related to restricted stock grants			7,248
Net income (loss) attributable to Brookdale Senior Living Inc. common stockholders	(67,293)				(67,293)
Net income (loss) attributable to noncontrolling interest	(67,323)					(30)
Balance at end of period at Jun. 30, 2024	341,673	$ 2,077	4,346,116	(102,774)	(3,905,205)	1,459
Balance at beginning of period (in shares) at Dec. 31, 2023		188,253,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued for settlement of prepaid stock purchase contracts (in shares)		6,709,000
Shares issued for warrant exercise (in shares)		942,000
Restricted stock and restricted stock units, net (in shares)		1,873,000
Shares withheld for employee taxes (in shares)		(576,000)
Balances at end of period (in shares) at Jun. 30, 2024		197,201,000
Balance at beginning of period at Mar. 31, 2024	375,448	$ 2,035	4,342,191	(102,774)	(3,867,478)	1,474
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued for settlement of prepaid stock purchase contracts		32	(32)
Shares issued for warrant exercise		9	(9)
Restricted stock and restricted stock units, net		1	(1)
Shares withheld for employee taxes			(8)
Compensation expense related to restricted stock grants			3,975
Net income (loss) attributable to Brookdale Senior Living Inc. common stockholders	(37,727)				(37,727)
Net income (loss) attributable to noncontrolling interest	(37,742)					(15)
Balance at end of period at Jun. 30, 2024	341,673	$ 2,077	4,346,116	(102,774)	(3,905,205)	1,459
Balance at beginning of period (in shares) at Mar. 31, 2024		193,013,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued for settlement of prepaid stock purchase contracts (in shares)		3,152,000
Shares issued for warrant exercise (in shares)		942,000
Restricted stock and restricted stock units, net (in shares)		95,000
Shares withheld for employee taxes (in shares)		(1,000)
Balances at end of period (in shares) at Jun. 30, 2024		197,201,000
Balance at beginning of period at Dec. 31, 2024	213,905	$ 2,105	4,352,991	(102,774)	(4,039,847)	1,430
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued for settlement of prepaid stock purchase contracts		296	(296)
Shares issued for warrant exercise		57	(57)
Restricted stock and restricted stock units, net		31	(31)
Shares withheld for employee taxes		(9)	(6,152)
Compensation expense related to restricted stock grants			7,068
Net income (loss) attributable to Brookdale Senior Living Inc. common stockholders	(108,003)				(108,003)
Net income (loss) attributable to noncontrolling interest	(108,032)					(29)
Balance at end of period at Jun. 30, 2025	$ 106,780	$ 2,480	4,353,523	(102,774)	(4,147,850)	1,401
Balance at beginning of period (in shares) at Dec. 31, 2024	200,019,826	200,020,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued for settlement of prepaid stock purchase contracts (in shares)		29,636,000
Shares issued for warrant exercise (in shares)		5,702,000
Restricted stock and restricted stock units, net (in shares)		3,152,000
Shares withheld for employee taxes (in shares)		(1,056,000)
Balances at end of period (in shares) at Jun. 30, 2025	237,454,480	237,454,000
Balance at beginning of period at Mar. 31, 2025	$ 148,135	$ 2,445	4,351,874	(102,774)	(4,104,826)	1,416
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued for warrant exercise		31	(31)
Restricted stock and restricted stock units, net		6	(6)
Shares withheld for employee taxes		(2)	(1,403)
Compensation expense related to restricted stock grants			3,089
Net income (loss) attributable to Brookdale Senior Living Inc. common stockholders	(43,024)				(43,024)
Net income (loss) attributable to noncontrolling interest	(43,039)					(15)
Balance at end of period at Jun. 30, 2025	$ 106,780	$ 2,480	$ 4,353,523	$ (102,774)	$ (4,147,850)	$ 1,401
Balance at beginning of period (in shares) at Mar. 31, 2025		234,003,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued for warrant exercise (in shares)		3,058,000
Restricted stock and restricted stock units, net (in shares)		637,000
Shares withheld for employee taxes (in shares)		(244,000)
Balances at end of period (in shares) at Jun. 30, 2025	237,454,480	237,454,000