v3.24.1.u1
Fair Value - Schedule of Financial Assets and Liabilities Carried at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Financial Assets:    
Available-for-sale securities $ 100,319 $ 102,368
Domestic servicing rights 19,612 19,384
Derivative assets 82,916 63,437
VIE assets 66,169,669 69,504,196
Financial Liabilities:    
Derivative liabilities 74,647 102,467
VIE liabilities 59,129,488 62,481,214
Primary Beneficiary    
Financial Assets:    
Woodstar Fund investments 2,008,937 2,012,833
VIE assets 48,000  
Financial Liabilities:    
VIE liabilities 10,200  
Fair value measurements on recurring basis    
Financial Assets:    
Equity security 7,265 8,340
Derivative assets 82,916 63,437
Total 46,514,607 48,656,955
Financial Liabilities:    
Derivative liabilities 74,647 102,467
Total 40,140,070 42,278,201
Fair value measurements on recurring basis | Loans under fair value option    
Financial Assets:    
Loans under fair value option 2,642,219 2,645,637
Fair value measurements on recurring basis | RMBS    
Financial Assets:    
Available-for-sale securities 100,319 102,368
Fair value measurements on recurring basis | CMBS    
Financial Assets:    
Available-for-sale securities 19,486 18,600
Fair value measurements on recurring basis | Woodstar Fund investments    
Financial Assets:    
Woodstar Fund investments 2,008,937 2,012,833
Fair value measurements on recurring basis | Domestic servicing rights    
Financial Assets:    
Domestic servicing rights 19,612 19,384
Fair value measurements on recurring basis | VIE assets | Primary Beneficiary    
Financial Assets:    
VIE assets 41,633,853 43,786,356
Fair value measurements on recurring basis | VIE liabilities | Primary Beneficiary    
Financial Liabilities:    
VIE liabilities 40,065,423 42,175,734
Fair value measurements on recurring basis | Level I    
Financial Assets:    
Equity security 7,265 8,340
Derivative assets 0 0
Total 7,265 8,340
Financial Liabilities:    
Derivative liabilities 0 0
Total 0 0
Fair value measurements on recurring basis | Level I | Loans under fair value option    
Financial Assets:    
Loans under fair value option 0 0
Fair value measurements on recurring basis | Level I | RMBS    
Financial Assets:    
Available-for-sale securities 0 0
Fair value measurements on recurring basis | Level I | CMBS    
Financial Assets:    
Available-for-sale securities 0 0
Fair value measurements on recurring basis | Level I | Woodstar Fund investments    
Financial Assets:    
Woodstar Fund investments 0 0
Fair value measurements on recurring basis | Level I | Domestic servicing rights    
Financial Assets:    
Domestic servicing rights 0 0
Fair value measurements on recurring basis | Level I | VIE assets | Primary Beneficiary    
Financial Assets:    
VIE assets 0 0
Fair value measurements on recurring basis | Level I | VIE liabilities | Primary Beneficiary    
Financial Liabilities:    
VIE liabilities 0 0
Fair value measurements on recurring basis | Level II    
Financial Assets:    
Equity security 0 0
Derivative assets 82,916 63,437
Total 82,916 63,437
Financial Liabilities:    
Derivative liabilities 74,647 102,467
Total 34,781,553 36,673,405
Fair value measurements on recurring basis | Level II | Loans under fair value option    
Financial Assets:    
Loans under fair value option 0 0
Fair value measurements on recurring basis | Level II | RMBS    
Financial Assets:    
Available-for-sale securities 0 0
Fair value measurements on recurring basis | Level II | CMBS    
Financial Assets:    
Available-for-sale securities 0 0
Fair value measurements on recurring basis | Level II | Woodstar Fund investments    
Financial Assets:    
Woodstar Fund investments 0 0
Fair value measurements on recurring basis | Level II | Domestic servicing rights    
Financial Assets:    
Domestic servicing rights 0 0
Fair value measurements on recurring basis | Level II | VIE assets | Primary Beneficiary    
Financial Assets:    
VIE assets 0 0
Fair value measurements on recurring basis | Level II | VIE liabilities | Primary Beneficiary    
Financial Liabilities:    
VIE liabilities 34,706,906 36,570,938
Fair value measurements on recurring basis | Level III    
Financial Assets:    
Equity security 0 0
Derivative assets 0 0
Total 46,424,426 48,585,178
Financial Liabilities:    
Derivative liabilities 0 0
Total 5,358,517 5,604,796
Fair value measurements on recurring basis | Level III | Loans under fair value option    
Financial Assets:    
Loans under fair value option 2,642,219 2,645,637
Fair value measurements on recurring basis | Level III | RMBS    
Financial Assets:    
Available-for-sale securities 100,319 102,368
Fair value measurements on recurring basis | Level III | CMBS    
Financial Assets:    
Available-for-sale securities 19,486 18,600
Fair value measurements on recurring basis | Level III | Woodstar Fund investments    
Financial Assets:    
Woodstar Fund investments 2,008,937 2,012,833
Fair value measurements on recurring basis | Level III | Domestic servicing rights    
Financial Assets:    
Domestic servicing rights 19,612 19,384
Fair value measurements on recurring basis | Level III | VIE assets | Primary Beneficiary    
Financial Assets:    
VIE assets 41,633,853 43,786,356
Fair value measurements on recurring basis | Level III | VIE liabilities | Primary Beneficiary    
Financial Liabilities:    
VIE liabilities $ 5,358,517 $ 5,604,796