Permanent and Temporary Equity (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Temporary Equity [Line Items]
Acquisition-related activity	$ 751,200	$ 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 [Member]
Temporary Equity [Line Items]
Equity offering program, remaining authorized offering amount		$ 1,000,000
Stock issued during period, shares, new issues, equity offering program		10,900,000	1,500,000	2,700,000
Stock Issued During Period, Value, New Issues, Equity Offering Program		$ 626,400	$ 66,600	$ 177,900
Shares Issued, Price Per Share		$ 57.71	$ 44.88	$ 66.75