Loans Held for Sale, at Fair Value - Summary of Loans Held for Sale at Cost Basis and Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable
Loans held for sale, at fair value	$ 616,420	$ 138,345
Cost Basis
Accounts, Notes, Loans and Financing Receivable
Loans held for sale, at fair value	616,970	137,633
Fair Value
Accounts, Notes, Loans and Financing Receivable
Loans held for sale, at fair value	$ 616,420	$ 138,345