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Financing Agreements - Financing Agreements (Details) $ in Thousands |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Apr. 04, 2022 | Mar. 31, 2023 | Jun. 30, 2023 USD ($) | Dec. 31, 2022 USD ($)
Financing Agreements [Line Items] |  |  |  |
Unpaid Principal Balance |  |  | $ 7,789,487 | $ 7,043,944
Fair Value / Carrying Value |  |  | $ 7,568,177 | $ 6,812,086
Weighted average fixed rate for Senior Bonds issued |  |  | 3.96% | 3.70%
Stock split ratio, common stock | 0.25 |  |  |
Agreements with mark-to-market collateral provisions |  |  |  |
Financing Agreements [Line Items] |  |  |  |
Unpaid Principal Balance |  |  | $ 2,403,374 | $ 2,223,298
Fair Value / Carrying Value |  |  | $ 2,402,444 | $ 2,223,047
Weighted average fixed rate for Senior Bonds issued |  |  | 6.87% | 5.73%
Agreements with mark-to-market collateral provisions | 0-3 Months |  |  |  |
Financing Agreements [Line Items] |  |  |  |
Unpaid Principal Balance |  |  | $ 865,655 |
Agreements with mark-to-market collateral provisions | 3-6 Months |  |  |  |
Financing Agreements [Line Items] |  |  |  |
Unpaid Principal Balance |  |  | 88,389 |
Agreements with mark-to-market collateral provisions | 6-12 Months |  |  |  |
Financing Agreements [Line Items] |  |  |  |
Unpaid Principal Balance |  |  | 480,381 |
Fair Value / Carrying Value |  |  | $ 311,200 |
Extension period |  |  | 1 year |
Agreements with mark-to-market collateral provisions | Greater than 12 Months |  |  |  |
Financing Agreements [Line Items] |  |  |  |
Unpaid Principal Balance |  |  | $ 968,949 |
Fair Value / Carrying Value |  |  | 681,100 |
Agreements with mark-to-market collateral provisions | Residential Whole Loans and REO |  |  |  |
Financing Agreements [Line Items] |  |  |  |
Unpaid Principal Balance |  |  | 1,939,310 | $ 2,111,647
Fair Value / Carrying Value |  |  | $ 1,938,380 | $ 2,111,396
Weighted average fixed rate for Senior Bonds issued |  |  | 7.17% | 5.74%
Weighted Average Term To Maturity (Months) |  | 6 months 27 days | 9 months 3 days |
Agreements with mark-to-market collateral provisions | Residential Whole Loans and REO | Not Held at Fair Value |  |  |  |
Financing Agreements [Line Items] |  |  |  |
Fair Value / Carrying Value |  |  | $ 553,200 |
Agreements with mark-to-market collateral provisions | Residential Whole Loans and REO | 0-3 Months |  |  |  |
Financing Agreements [Line Items] |  |  |  |
Unpaid Principal Balance |  |  | 401,591 |
Agreements with mark-to-market collateral provisions | Residential Whole Loans and REO | 3-6 Months |  |  |  |
Financing Agreements [Line Items] |  |  |  |
Unpaid Principal Balance |  |  | 88,389 |
Agreements with mark-to-market collateral provisions | Residential Whole Loans and REO | 6-12 Months |  |  |  |
Financing Agreements [Line Items] |  |  |  |
Unpaid Principal Balance |  |  | 480,381 |
Agreements with mark-to-market collateral provisions | Residential Whole Loans and REO | Greater than 12 Months |  |  |  |
Financing Agreements [Line Items] |  |  |  |
Unpaid Principal Balance |  |  | 968,949 |
Agreements with mark-to-market collateral provisions | Securitized debt |  |  |  |
Financing Agreements [Line Items] |  |  |  |
Unpaid Principal Balance |  |  | 464,064 | $ 111,651
Fair Value / Carrying Value |  |  | $ 464,064 | $ 111,651
Weighted average fixed rate for Senior Bonds issued |  |  | 5.67% | 5.47%
Weighted Average Term To Maturity (Months) |  | 1 month 15 days | 15 days |
Agreements with mark-to-market collateral provisions | Securitized debt | 0-3 Months |  |  |  |
Financing Agreements [Line Items] |  |  |  |
Unpaid Principal Balance |  |  | $ 464,064 |
Agreements with mark-to-market collateral provisions | Securitized debt | 3-6 Months |  |  |  |
Financing Agreements [Line Items] |  |  |  |
Unpaid Principal Balance |  |  | 0 |
Agreements with mark-to-market collateral provisions | Securitized debt | 6-12 Months |  |  |  |
Financing Agreements [Line Items] |  |  |  |
Unpaid Principal Balance |  |  | 0 |
Agreements with mark-to-market collateral provisions | Securitized debt | Greater than 12 Months |  |  |  |
Financing Agreements [Line Items] |  |  |  |
Unpaid Principal Balance |  |  | 0 |
Agreements with mark-to-market collateral provisions | Estimated Fair Value |  |  |  |
Financing Agreements [Line Items] |  |  |  |
Financing agreements, amortized cost |  |  | 553,200 | $ 578,900
Agreements with mark-to-market collateral provisions | Estimated Fair Value | Held at Fair Value |  |  |  |
Financing Agreements [Line Items] |  |  |  |
Fair Value / Carrying Value |  |  |  | 578,900
Agreements with Non-mark-to-market Collateral Provisions | Residential Whole Loans and REO |  |  |  |
Financing Agreements [Line Items] |  |  |  |
Unpaid Principal Balance |  |  | 968,546 | 1,004,260
Fair Value / Carrying Value |  |  | $ 967,884 | $ 1,003,604
Weighted average fixed rate for Senior Bonds issued |  |  | 7.61% | 6.53%
Weighted Average Term To Maturity (Months) |  | 16 months 24 days | 13 months 9 days |
Agreements with Non-mark-to-market Collateral Provisions | Residential Whole Loans and REO | Held at Fair Value |  |  |  |
Financing Agreements [Line Items] |  |  |  |
Fair Value / Carrying Value |  |  | $ 440,100 |
Agreements with Non-mark-to-market Collateral Provisions | Residential Whole Loans and REO | 0-3 Months |  |  |  |
Financing Agreements [Line Items] |  |  |  |
Unpaid Principal Balance |  |  | 491,160 |
Agreements with Non-mark-to-market Collateral Provisions | Residential Whole Loans and REO | 3-6 Months |  |  |  |
Financing Agreements [Line Items] |  |  |  |
Unpaid Principal Balance |  |  | 13,033 |
Agreements with Non-mark-to-market Collateral Provisions | Residential Whole Loans and REO | 6-12 Months |  |  |  |
Financing Agreements [Line Items] |  |  |  |
Unpaid Principal Balance |  |  | 0 |
Agreements with Non-mark-to-market Collateral Provisions | Residential Whole Loans and REO | Greater than 12 Months |  |  |  |
Financing Agreements [Line Items] |  |  |  |
Unpaid Principal Balance |  |  | 464,353 |
Agreements with Non-mark-to-market Collateral Provisions | Estimated Fair Value |  |  |  |
Financing Agreements [Line Items] |  |  |  |
Fair Value / Carrying Value |  |  |  | $ 884,500
Financing agreements, amortized cost |  |  | 440,100 | 884,500
Securitized debt | Residential Whole Loans and REO |  |  |  |
Financing Agreements [Line Items] |  |  |  |
Unpaid Principal Balance |  |  | 4,187,578 | 3,586,397
Fair Value / Carrying Value |  |  | $ 3,969,274 | $ 3,357,590
Weighted average fixed rate for Senior Bonds issued |  |  | 3.88% | 3.33%
Securitized debt | Residential Whole Loans and REO | Held at Fair Value |  |  |  |
Financing Agreements [Line Items] |  |  |  |
Fair Value / Carrying Value |  |  | $ 3,100,000 |
Securitized debt | Estimated Fair Value |  |  |  |
Financing Agreements [Line Items] |  |  |  |
Fair Value / Carrying Value |  |  |  | $ 2,400,000
Weighted average fixed rate for Senior Bonds issued |  |  |  | 0.84%
Financing agreements, amortized cost |  |  | 3,300,000 | $ 2,600,000
Convertible senior notes | Unsecured |  |  |  |
Financing Agreements [Line Items] |  |  |  |
Unpaid Principal Balance |  |  | 229,989 | 229,989
Fair Value / Carrying Value |  |  | $ 228,575 | $ 227,845
Weighted average fixed rate for Senior Bonds issued |  |  | 6.94% | 6.94%
Weighted Average Term To Maturity (Months) |  | 17 months 15 days | 11 months 15 days |
Impact of Net Swap Carry | Unsecured |  |  |  |
Financing Agreements [Line Items] |  |  |  |
Weighted average fixed rate for Senior Bonds issued |  |  | (1.38%) | (0.84%)

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