Loans Held for Investment, Net - Schedule of Loans Held for Investment as a Percentage of Face Amount by Geographic Areas Face Amounts (Details)	Jun. 30, 2026	Dec. 31, 2025
Financing Receivable, Nonaccrual [Line Items]
% of loan portfolio	1	1
Life Science
Financing Receivable, Nonaccrual [Line Items]
% of loan portfolio	0.3975	0.2807
Multifamily
Financing Receivable, Nonaccrual [Line Items]
% of loan portfolio	0.2937	0.3094
Single Family Rental
Financing Receivable, Nonaccrual [Line Items]
% of loan portfolio	0.1925	0.2792
Self-Storage
Financing Receivable, Nonaccrual [Line Items]
% of loan portfolio	0.054	0.0449
Marina
Financing Receivable, Nonaccrual [Line Items]
% of loan portfolio	0.0267	0.0491
Industrial
Financing Receivable, Nonaccrual [Line Items]
% of loan portfolio	0.0356	0.0367
Massachusetts
Financing Receivable, Nonaccrual [Line Items]
% of loan portfolio	0.2621	0.1757
Texas
Financing Receivable, Nonaccrual [Line Items]
% of loan portfolio	0.119	0.1522
Georgia
Financing Receivable, Nonaccrual [Line Items]
% of loan portfolio	0.0596	0.1041
Florida
Financing Receivable, Nonaccrual [Line Items]
% of loan portfolio	0.0794	0.0819
Maryland
Financing Receivable, Nonaccrual [Line Items]
% of loan portfolio	0.0753	0.0775
California
Financing Receivable, Nonaccrual [Line Items]
% of loan portfolio	0.06	0.0588
Virginia
Financing Receivable, Nonaccrual [Line Items]
% of loan portfolio	0.0577	0.0567
Other
Financing Receivable, Nonaccrual [Line Items]
% of loan portfolio	0.2869	0.2931