Loans Held for Investment, net - Loan Portfolio (Details) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2026 USD ($) loan	Dec. 31, 2025 USD ($) loan	Mar. 31, 2026 USD ($)	Jun. 30, 2025 USD ($)	Mar. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans \| loan	27	24
Amortized Cost \| $	$ 719,634	$ 685,707	$ 730,096	$ 631,318	$ 660,237	$ 609,916
Percentage of Value	100.00%	100.00%
South
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans \| loan	10	8
Amortized Cost \| $	$ 288,841	$ 222,512
Percentage of Value	40.00%	32.00%
East
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans \| loan	8	7
Amortized Cost \| $	$ 238,990	$ 223,240
Percentage of Value	33.00%	33.00%
West
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans \| loan	8	6
Amortized Cost \| $	$ 168,181	$ 134,741
Percentage of Value	24.00%	20.00%
Midwest
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans \| loan	1	3
Amortized Cost \| $	$ 23,622	$ 105,214
Percentage of Value	3.00%	15.00%
Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans \| loan	5	6
Amortized Cost \| $	$ 139,755	$ 165,745
Percentage of Value	19.00%	24.00%
Student Housing
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans \| loan	4	4
Amortized Cost \| $	$ 119,596	$ 115,575
Percentage of Value	17.00%	17.00%
Hotel
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans \| loan	4	4
Amortized Cost \| $	$ 119,125	$ 121,393
Percentage of Value	17.00%	18.00%
Industrial
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans \| loan	4	4
Amortized Cost \| $	$ 113,500	$ 112,792
Percentage of Value	16.00%	16.00%
Multifamily
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans \| loan	3	3
Amortized Cost \| $	$ 67,115	$ 87,920
Percentage of Value	9.00%	13.00%
Self Storage
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans \| loan	3	2
Amortized Cost \| $	$ 64,264	$ 47,990
Percentage of Value	9.00%	7.00%
Other
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans \| loan	2	1
Amortized Cost \| $	$ 49,418	$ 34,292
Percentage of Value	7.00%	5.00%
Medical Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of Loans \| loan	2	0
Amortized Cost \| $	$ 46,861	$ 0
Percentage of Value	6.00%	0.00%