PERMANENT AND TEMPORARY EQUITY - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Sep. 21, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Temporary Equity [Line Items]
Acquisition-related activity				$ 751,248
Common stock outstanding percentage of beneficial ownership acquired threshold for excess shares		9.00%
Preferred stock outstanding percentage of beneficial ownership acquired threshold for excess shares		9.90%
Maximum deferral payment period of purchase price for excess shares		5 years
Number of excess shares held by trustee		0
New Senior Investment Group Inc. Acquisition
Temporary Equity [Line Items]
Number of shares issued in transaction (in shares)	13,300,000
At The Market Equity Offering Program
Temporary Equity [Line Items]
Equity offering program, authorized offering amount		$ 1,000,000
Stock issued during period, shares, new issues, equity offering program (in shares)			0	10,900,000
Gross proceeds				$ 626,400
Equity Offering Program, Number Of Shares Issued		2,300,000
Consideration received		$ 110,400
Shares issued, weighted average price per share		$ 47.89
Equity offering program, remaining authorized offering amount		$ 889,600
Average gross price (USD per share)				$ 57.71