Securitized Debt - Maturities of Long-Term Debt (Details) - Variable Interest Entities, Primary Beneficiary - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Securitized debt
Debt Instrument [Line Items]
Within One Year	$ 1,337,900	$ 1,405,503
One to Three Years	2,179,159	2,302,421
Three to Five Years	1,983,884	1,738,678
Greater Than Five Years	2,365,273	2,942,234
Total	7,866,216	8,388,836
Securitized Loans | Non-Agency RMBS
Debt Instrument [Line Items]
Within One Year	47	251
One to Three Years	91	326
Three to Five Years	0	0
Greater Than Five Years	9	67
Total	$ 147	$ 644