Investments in Real Estate Debt - Schedule of Mortgage Loans by Property Type and Geographic Distribution (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair Value	$ 449,911	$ 302,868
Percentage of portfolio	100.00%	100.00%
Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair Value	$ 176,624	$ 110,670
Percentage of portfolio	39.30%	36.60%
Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair Value	$ 96,056	$ 91,292
Percentage of portfolio	21.30%	30.10%
Hotel
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair Value	$ 93,865	$ 48,795
Percentage of portfolio	20.90%	16.10%
Data Center
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair Value	$ 63,131	$ 40,651
Percentage of portfolio	14.00%	13.40%
Self-Storage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair Value	$ 17,659	$ 8,884
Percentage of portfolio	3.90%	2.90%
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair Value	$ 2,576	$ 2,576
Percentage of portfolio	0.60%	0.90%
Northeast
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair Value	$ 190,998	$ 169,829
Percentage of portfolio	42.50%	56.10%
Mid-Atlantic
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair Value	$ 66,647	$ 44,166
Percentage of portfolio	14.80%	14.60%
West
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair Value	$ 132,680	$ 32,841
Percentage of portfolio	29.50%	10.80%
Southeast
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair Value	$ 27,582	$ 27,582
Percentage of portfolio	6.10%	9.10%
Southwest
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair Value	$ 18,400	$ 18,400
Percentage of portfolio	4.10%	6.10%
Midwest
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair Value	$ 13,604	$ 10,050
Percentage of portfolio	3.00%	3.30%