Investments in Loans - Schedule of Loan Information (Details) $ in Thousands, £ in Millions	6 Months Ended
	Jun. 30, 2024 USD ($)	May 31, 2024 GBP (£)	Dec. 31, 2023 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized Cost	$ 603,028		$ 207,837
Allowance	(8,980)		(2,498)
Carrying Amount	594,048		205,339
Increase in allowance for credit losses	$ 6,500
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Other assets, net
Senior Secured Note
Financing Receivable, Allowance for Credit Loss [Line Items]
Carrying Amount	$ 379,100	£ 300
Senior Secured Note | Spirit Realty Capital, Inc.
Financing Receivable, Allowance for Credit Loss [Line Items]
Loan acquired in conjunction with acquisition, fair value	4,600
Loan acquired in conjunction with acquisition, initial expected credit loss	1,800
Senior Secured Notes Receivable
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized Cost	559,580		174,337
Allowance	(7,945)		(2,498)
Carrying Amount	551,635		171,839
Mortgage Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized Cost	33,500		33,500
Allowance	0		0
Carrying Amount	33,500		33,500
Accrued interest	9,400		$ 3,400
Unsecured Loan
Financing Receivable, Allowance for Credit Loss [Line Items]
Amortized Cost	9,948
Allowance	(1,035)
Carrying Amount	$ 8,913