Use of Special Purpose Entities and Variable Interest Entities - Narrative (Details) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2024 USD ($) entity	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Variable Interest Entity [Line Items]
Number of SPE liquidated | entity	1
Total residential whole loans	$ 9,200,000	$ 9,200,000	$ 9,000,000
Asset-backed Securities, Securitized Loans and Receivables
Variable Interest Entity [Line Items]
Proceeds from issuance of debt		7,504,463	7,089,575
Residential whole loans transferred to consolidated VIEs	6,000,000	6,000,000	5,700,000
Securitized debt	5,000,000	5,000,000	4,800,000
Asset-backed Securities, Securitized Loans and Receivables | Other Assets
Variable Interest Entity [Line Items]
Real estate owned at fair value	10,200	10,200	$ 33,300
Asset-backed Securities, Securitized Loans and Receivables | Senior Bonds
Variable Interest Entity [Line Items]
Proceeds from issuance of debt	160,000	655,100
Proceed from debt net of offering expenses and underwriting discount	160,000	$ 654,900
Repayments of debt	$ 68,100