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, 2021	$ 699,623	$ 1,975	$ 4,208,675	$ (102,774)	$ (3,410,474)	$ 2,221
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock and restricted stock units, net		9	(9)
Shares withheld for employee taxes		(6)	(4,191)
Compensation expense related to restricted stock grants			3,885
Net income (loss) attributable to Brookdale Senior Living Inc. common stockholders	(100,013)				(100,013)
Net income (loss) attributable to noncontrolling interest	(100,032)					(19)
Balance at end of period at Mar. 31, 2022	599,279	$ 1,978	4,208,360	(102,774)	(3,510,487)	2,202
Balance at beginning of period (in shares) at Dec. 31, 2021		186,958,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock and restricted stock units, net (in shares)		925,000
Shares withheld for employee taxes (in shares)		(600,000)
Balances at end of period (in shares) at Mar. 31, 2022		187,283,000
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	187,249,466	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	188,234,695	188,235,000