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Residential Investor Loans - Schedule of Activity of Unsecuritized Investor Loans (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) loan	Sep. 30, 2024 USD ($)
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Principal balance of loans originated			$ 9,125,996	$ 4,910,749
Principal balance of loans sold to third parties			$ 15,756	5,331
Number of loans transferred | loan			1
Residential Investor Term, Unsecuritized
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Principal balance of loans originated	$ 228,298	$ 158,584	$ 645,061	493,212
Principal balance of loans acquired (1)	530	3,145	43,567	3,793
Principal balance of loans sold to third parties	228,741	206,380	661,951	464,836
Transfer of loans between portfolios	0	0	0	0
Residential Investor Bridge, Unsecuritized
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Principal balance of loans originated	258,594	286,833	666,494	714,977
Principal balance of loans acquired (1)	80,223	0	105,456	15,677
Principal balance of loans sold to third parties	625,196	67,655	1,007,770	277,170
Transfer of loans between portfolios	$ 38,179	$ (62,386)	$ 63,554	$ (250,319)

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Loan, Transfer from Held-for-Sale to Held-in-Portfolio, Net Of Substitutions

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