Use of Special Purpose Entities and Variable Interest Entities - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
Variable Interest Entity [Line Items]
Total residential whole loans	$ 8,100,000	$ 8,100,000	$ 7,500,000
Asset-backed Securities, Securitized Loans and Receivables
Variable Interest Entity [Line Items]
Proceeds from issuance of debt		6,103,771	5,286,305
Residential whole loans	4,800,000	4,800,000	4,000,000
Securitized debt	4,000,000	4,000,000	3,400,000
Asset-backed Securities, Securitized Loans and Receivables | Other Assets
Variable Interest Entity [Line Items]
Real estate owned at fair value	30,400	30,400	$ 36,500
Senior Bonds
Variable Interest Entity [Line Items]
Proceeds from issuance of debt	308,800	832,000
Proceed from debt net of offering expenses and underwriting discount	$ 296,400	$ 817,500