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Derivative Instruments - Schedule of Initial Margin (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Margin deposit assets, initial amount $ 137,247 $ 101,652
Restricted Cash    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Margin deposit assets, initial amount 69,016 68,253
Agency RMBS    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Margin deposit assets, initial amount $ 68,231 $ 33,399