Consolidated Securitization Vehicles and Other Variable Interest Entities - Income, OTTI and Expense Amounts Related to Consolidated VIEs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024
Variable Interest Entity [Line Items]
Net interest income	$ 69,219		$ 65,106
Net increase (decrease) in provision for credit losses	3,387		1,347
Servicing fees	7,431		7,663
Variable Interest Entities, Primary Beneficiary
Variable Interest Entity [Line Items]
Interest income, Assets of consolidated VIEs	144,402	$ 142,921	146,917
Interest expense, Non-recourse liabilities of VIEs	69,651	70,083	73,123
Net interest income	74,751	72,837	73,794
Net increase (decrease) in provision for credit losses	1,147	(1,904)	(951)
Servicing fees	$ 6,170	$ 26,964	$ 6,865