Loans Receivable - Schedule of Loan Receivable Activity (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2026	Dec. 31, 2025	Aug. 31, 2025	Jan. 31, 2025
Financing Receivable, before Allowance for Credit Loss [Roll Forward]
Loans receivable, net	$ 284,203	$ 606,020
Sunrise Senior Housing Portfolio
Financing Receivable, before Allowance for Credit Loss [Roll Forward]
Loans receivable, net			$ 58,000
Secured Loans
Financing Receivable, before Allowance for Credit Loss [Roll Forward]
Loans receivable, beginning balance	583,460	638,482
Add: Advances on and acquisitions of loans receivable	56,502	87,648
Less: Receipts on loans receivable and other reductions	(398,999)	(142,670)
Loans receivable, ending balance	240,963	583,460
Secured Loans \| Other SHOP Seller Financing
Financing Receivable, before Allowance for Credit Loss [Roll Forward]
Loans receivable, net				$ 48,000
Mezzanine Loans
Financing Receivable, before Allowance for Credit Loss [Roll Forward]
Loans receivable, beginning balance	47,690	50,314
Add: Advances on and acquisitions of loans receivable	9,342	4,756
Less: Receipts on loans receivable and other reductions	(4,840)	(7,380)
Loans receivable, ending balance	$ 52,192	$ 47,690