Secured Financing Agreements - Schedule of Secured Financing Agreements (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2026	Dec. 31, 2025
Assets Sold under Agreements to Repurchase [Line Items]
Secured financing agreements outstanding principal secured by:	$ 7,725,542	$ 6,031,182
Repurchase Agreements
Assets Sold under Agreements to Repurchase [Line Items]
Secured financing agreements outstanding principal secured by:	7,734,609	6,038,336
Repurchase Agreements \| Investment Portfolio Segment
Assets Sold under Agreements to Repurchase [Line Items]
Secured financing agreements outstanding principal secured by:	7,007,452	5,236,609
Average balance of Secured financing agreements secured by:	6,070,823	4,182,029
Repurchase Agreements \| Asset Pledged as Collateral \| Investment Portfolio Segment
Assets Sold under Agreements to Repurchase [Line Items]
Securities pledged as collateral at fair value on Secured financing agreements:	8,066,723	6,461,612
Repurchase Agreements \| Agency RMBS \| Investment Portfolio Segment
Assets Sold under Agreements to Repurchase [Line Items]
Secured financing agreements outstanding principal secured by:	5,038,134	3,257,275
Average balance of Secured financing agreements secured by:	$ 4,160,168	$ 1,830,021
Average borrowing rate of Secured financing agreements secured by:	3.78%	3.99%
Average remaining maturity of Secured financing agreements secured by:	24 days	26 days
Average original maturity of Secured financing agreements secured by:	47 days	48 days
Repurchase Agreements \| Agency RMBS \| Asset Pledged as Collateral \| Investment Portfolio Segment
Assets Sold under Agreements to Repurchase [Line Items]
Securities pledged as collateral at fair value on Secured financing agreements:	$ 5,246,616	$ 3,412,955
Repurchase Agreements \| Loans held for sale, at fair value \| Investment Portfolio Segment
Assets Sold under Agreements to Repurchase [Line Items]
Secured financing agreements outstanding principal secured by:	274,931
Average balance of Secured financing agreements secured by:	$ 26,315
Average borrowing rate of Secured financing agreements secured by:	5.06%
Average remaining maturity of Secured financing agreements secured by:	28 days
Average original maturity of Secured financing agreements secured by:	28 days
Repurchase Agreements \| Loans held for sale, at fair value \| Residential Origination Segment
Assets Sold under Agreements to Repurchase [Line Items]
Secured financing agreements outstanding principal secured by:	$ 727,158	801,727
Average balance of Secured financing agreements secured by:	$ 721,929	$ 620,654
Average borrowing rate of Secured financing agreements secured by:	5.55%	5.84%
Average remaining maturity of Secured financing agreements secured by:	121 days	218 days
Average original maturity of Secured financing agreements secured by:	121 days	218 days
Repurchase Agreements \| Loans held for sale, at fair value \| Asset Pledged as Collateral \| Investment Portfolio Segment
Assets Sold under Agreements to Repurchase [Line Items]
Securities pledged as collateral at fair value on Secured financing agreements:	$ 307,031
Repurchase Agreements \| Loans held for sale, at fair value \| Asset Pledged as Collateral \| Residential Origination Segment
Assets Sold under Agreements to Repurchase [Line Items]
Securities pledged as collateral at fair value on Secured financing agreements:	815,413	$ 891,937
Repurchase Agreements \| Non-agency MBS and Loans held for investment
Assets Sold under Agreements to Repurchase [Line Items]
Debt issuance costs, net	37	271
Repurchase Agreements \| Non-agency MBS and Loans held for investment \| Investment Portfolio Segment
Assets Sold under Agreements to Repurchase [Line Items]
Secured financing agreements outstanding principal secured by:	1,677,682	1,948,416
Average balance of Secured financing agreements secured by:	$ 1,852,855	$ 2,321,499
Average borrowing rate of Secured financing agreements secured by:	6.33%	6.43%
Average remaining maturity of Secured financing agreements secured by:	210 days	278 days
Average original maturity of Secured financing agreements secured by:	230 days	299 days
Debt issuance costs, net		$ 271
Repurchase Agreements \| Non-agency MBS and Loans held for investment \| Asset Pledged as Collateral \| Investment Portfolio Segment
Assets Sold under Agreements to Repurchase [Line Items]
Securities pledged as collateral at fair value on Secured financing agreements:	$ 2,495,662	3,020,818
Repurchase Agreements \| Agency CMBS \| Investment Portfolio Segment
Assets Sold under Agreements to Repurchase [Line Items]
Secured financing agreements outstanding principal secured by:	16,705	30,918
Average balance of Secured financing agreements secured by:	$ 31,485	$ 30,509
Average borrowing rate of Secured financing agreements secured by:	3.76%	4.04%
Average remaining maturity of Secured financing agreements secured by:	15 days	8 days
Average original maturity of Secured financing agreements secured by:	29 days	35 days
Repurchase Agreements \| Agency CMBS \| Asset Pledged as Collateral \| Investment Portfolio Segment
Assets Sold under Agreements to Repurchase [Line Items]
Securities pledged as collateral at fair value on Secured financing agreements:	$ 17,414	$ 27,839

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