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Repurchase Agreements and Warehouse Facilities - Schedule of Repurchase Agreements Secured by Investment Securities (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Assets Sold under Agreements to Repurchase [Line Items] |  |
Outstanding Repurchase Agreements | $ 6,100,691 | $ 3,516,611
Fair Value of Collateral Pledged | 4,256,683 | 3,841,738
Agency RMBS, Non-Agency RMBS And U.S. Treasury Securities |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Outstanding Repurchase Agreements | 6,100,691 | 3,516,611
Fair Value of Collateral Pledged | 6,345,405 | 3,676,585
Amortized Cost of Collateral Pledged | 6,262,373 | 3,729,642
Agency RMBS, Non-Agency RMBS And U.S. Treasury Securities | Collateral Pledged |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Restricted cash | 700 | 11,800
Agency RMBS |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Outstanding Repurchase Agreements | 5,903,078 | 2,830,925
Fair Value of Collateral Pledged | 6,136,353 | 2,975,400
Amortized Cost of Collateral Pledged | 6,055,555 | 2,995,820
Non-Agency RMBS |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Outstanding Repurchase Agreements | 18,482 | 50,622
Fair Value of Collateral Pledged | 27,662 | 67,352
Amortized Cost of Collateral Pledged | 27,073 | 64,375
Non-Agency RMBS | Consolidated SLST |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Amortized Cost of Collateral Pledged | 22,000 | 20,600
U.S. Treasury securities |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Outstanding Repurchase Agreements | 179,131 | 635,064
Fair Value of Collateral Pledged | 181,390 | 633,833
Amortized Cost of Collateral Pledged | $ 179,745 | $ 669,447

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