Loans Held for Sale, at Fair Value - Summary of Loans Held for Sale at Cost Basis and Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable
Loans held for sale, at fair value	$ 572,670	$ 1,072,479
Cost Basis
Accounts, Notes, Loans and Financing Receivable
Loans held for sale, at fair value	571,705	1,051,220
Fair Value
Accounts, Notes, Loans and Financing Receivable
Loans held for sale, at fair value	$ 572,670	$ 1,072,479