Loans Held-for-Investment, Net of Allowance for Credit Losses - Schedule of Loans Held-for-Investment by Geographic Location (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Mar. 31, 2026	Dec. 31, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	$ 1,225,896	$ 1,362,799	$ 1,537,732	$ 1,671,311	$ 1,760,377	$ 1,897,648
Percentage of loan portfolio (as a percent)	100.00%		100.00%
Northeast
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	$ 342,663		$ 384,371
Percentage of loan portfolio (as a percent)	28.00%		25.00%
Southwest
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	$ 330,010		$ 330,382
Percentage of loan portfolio (as a percent)	26.90%		21.50%
West
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	$ 117,619		$ 233,741
Percentage of loan portfolio (as a percent)	9.60%		15.20%
Midwest
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	$ 108,208		$ 259,115
Percentage of loan portfolio (as a percent)	8.80%		16.90%
Southeast
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	$ 327,396		$ 330,123
Percentage of loan portfolio (as a percent)	26.70%		21.40%