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Residential Whole Loans - Additional Credit Related Information (Details) - Residential whole loans - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Non-QM loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total $ 5,672,020 $ 5,346,693
Business purpose loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 2,131,029 2,443,328
Seasoned RPL/NPL loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 925,157 979,016
Carrying Value    
Financing Receivable, Credit Quality Indicator [Line Items]    
2026 - 2022 0  
Prior 1,012,195  
Total 1,012,195  
Gross write-offs, 2026 - 2022 0  
Gross write-offs, prior 8  
Gross write-offs 8  
Carrying Value | Debt-to-Value Ratio, Less Than 80 Percent    
Financing Receivable, Credit Quality Indicator [Line Items]    
2026 - 2022 0  
Prior 967,173  
Total 967,173  
Carrying Value | Debt-to-Value Ratio, Greater Than 80 Percent    
Financing Receivable, Credit Quality Indicator [Line Items]    
2026 - 2022 0  
Prior 45,022  
Total 45,022  
Carrying Value | Non-QM loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
2026 - 2022 0  
Prior 530,198  
Total 530,198 593,213
Gross write-offs, 2026 - 2022 0  
Gross write-offs, prior 0  
Gross write-offs 0  
Carrying Value | Non-QM loans | Debt-to-Value Ratio, Less Than 80 Percent    
Financing Receivable, Credit Quality Indicator [Line Items]    
2026 - 2022 0  
Prior 527,764  
Total 527,764  
Carrying Value | Non-QM loans | Debt-to-Value Ratio, Greater Than 80 Percent    
Financing Receivable, Credit Quality Indicator [Line Items]    
2026 - 2022 0  
Prior 2,434  
Total 2,434  
Carrying Value | Business purpose loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
2026 - 2022 0  
Prior 85,791  
Total 85,791 95,163
Gross write-offs, 2026 - 2022 0  
Gross write-offs, prior 0  
Gross write-offs 0  
Carrying Value | Business purpose loans | Debt-to-Value Ratio, Less Than 80 Percent    
Financing Receivable, Credit Quality Indicator [Line Items]    
2026 - 2022 0  
Prior 83,643  
Total 83,643  
Carrying Value | Business purpose loans | Debt-to-Value Ratio, Greater Than 80 Percent    
Financing Receivable, Credit Quality Indicator [Line Items]    
2026 - 2022 0  
Prior 2,148  
Total 2,148  
Carrying Value | Seasoned RPL/NPL loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
2026 - 2022 0  
Prior 396,206  
Total 396,206 $ 414,676
Gross write-offs, 2026 - 2022 0  
Gross write-offs, prior 8  
Gross write-offs 8  
Carrying Value | Seasoned RPL/NPL loans | Debt-to-Value Ratio, Less Than 80 Percent    
Financing Receivable, Credit Quality Indicator [Line Items]    
2026 - 2022 0  
Prior 355,766  
Total 355,766  
Carrying Value | Seasoned RPL/NPL loans | Debt-to-Value Ratio, Greater Than 80 Percent    
Financing Receivable, Credit Quality Indicator [Line Items]    
2026 - 2022 0  
Prior 40,440  
Total $ 40,440