Secured Borrowings - Schedule of Carrying Value of Collateral Pledged with Respect to Secured Borrowings Outstanding (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Secured borrowings
Line of Credit Facility [Line Items]
Carrying value, Pledged assets	$ 3,003,120	$ 4,012,250
Total borrowings under credit facilities and other financing agreements \| Loans and finance receivables
Line of Credit Facility [Line Items]
Carrying value, Pledged assets	256,930	451,667
Total borrowings under credit facilities and other financing agreements \| Loans, held for sale \| Loans and finance receivables
Line of Credit Facility [Line Items]
Carrying value, Pledged assets	28,687	28,516
Total borrowings under credit facilities and other financing agreements \| Loans, net \| Loans and finance receivables
Line of Credit Facility [Line Items]
Carrying value, Pledged assets	228,243	423,151
Total borrowings under repurchase agreements \| Securities sold under agreements to repurchase
Line of Credit Facility [Line Items]
Carrying value, Pledged assets	2,746,190	3,560,583
Total borrowings under repurchase agreements \| Securities sold under agreements to repurchase \| Real estate acquired in settlement of loans
Line of Credit Facility [Line Items]
Carrying value, Pledged assets	487,038	546,835
Total borrowings under repurchase agreements \| Loans, held for sale \| Securities sold under agreements to repurchase
Line of Credit Facility [Line Items]
Carrying value, Pledged assets	216,900	506,883
Total borrowings under repurchase agreements \| Loans, net \| Securities sold under agreements to repurchase
Line of Credit Facility [Line Items]
Carrying value, Pledged assets	1,853,418	2,284,251
Total borrowings under repurchase agreements \| MBS \| Securities sold under agreements to repurchase
Line of Credit Facility [Line Items]
Carrying value, Pledged assets	31,586	34,501
Total borrowings under repurchase agreements \| Retained Interest \| Securities sold under agreements to repurchase
Line of Credit Facility [Line Items]
Carrying value, Pledged assets	$ 157,248	$ 188,113