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Secured Debt Arrangements, Net - Summary of Outstanding Balances, Maximum and Average Balances of Borrowings (Details) - Line of Credit $ in Thousands, € in Millions, £ in Millions, kr in Billions | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2025 USD ($) | Dec. 31, 2024 USD ($) | Mar. 31, 2025 GBP (£) | Mar. 31, 2025 EUR (€) | Mar. 31, 2025 SEK (kr) | Dec. 31, 2024 GBP (£) | Dec. 31, 2024 EUR (€) | Dec. 31, 2024 SEK (kr)
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Balance | $ 5,219,777 | $ 4,814,973 |  |  |  |  |  |
Collateral | 7,387,680 | 7,032,800 |  |  |  |  |  |
USD |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Balance | 0 | 0 |  |  |  |  |  |
JPMorgan |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Balance | 1,330,734 | 1,033,504 |  |  |  |  |  |
Collateral | 1,886,169 | 1,832,859 |  |  |  |  |  |
Maximum Month-End Balance | 1,330,734 | 1,063,261 |  |  |  |  |  |
Average Month-End Balance | 1,152,849 | 969,759 |  |  |  |  |  |
JPMorgan | USD |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Balance | 1,330,734 | 1,033,504 |  |  |  |  |  |
DB |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Balance | 120,033 | 123,434 |  |  |  |  |  |
Collateral | 195,669 | 199,217 |  |  |  |  |  |
Maximum Month-End Balance | 123,434 | 278,703 |  |  |  |  |  |
Average Month-End Balance | 122,301 | 201,020 |  |  |  |  |  |
DB | USD |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Balance | 120,033 | 123,434 |  |  |  |  |  |
Goldman | USD |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Balance |  | 0 |  |  |  |  |  |
Collateral |  | 0 |  |  |  |  |  |
Maximum Month-End Balance |  | 11,620 |  |  |  |  |  |
Average Month-End Balance |  | 2,903 |  |  |  |  |  |
Goldman | Fx contracts - GBP |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Balance | 399,499 | 373,706 |  |  |  |  |  |
Collateral | 517,703 | 485,054 |  |  |  |  |  |
Maximum Month-End Balance | 399,499 | 390,163 |  |  |  |  |  |
Average Month-End Balance | 387,209 | 251,571 |  |  |  |  |  |
CS Facility |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Balance | 540,413 | 462,886 |  |  |  |  |  |
Collateral | 800,512 | 702,927 |  |  |  |  |  |
Maximum Month-End Balance | 540,413 | 758,201 |  |  |  |  |  |
Average Month-End Balance | 513,653 | 640,453 |  |  |  |  |  |
CS Facility | USD |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Balance | 540,413 | 462,886 |  |  |  |  |  |
HSBC Facility |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Balance | 650,929 | 627,646 |  |  |  |  |  |
Collateral | 872,168 | 839,123 |  |  |  |  |  |
Maximum Month-End Balance | 650,929 | 672,422 |  |  |  |  |  |
Average Month-End Balance | 635,035 | 653,182 |  |  |  |  |  |
HSBC Facility | Fx contracts - GBP |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Balance | 389,607 | 377,483 |  |  |  |  |  |
HSBC Facility | Fx contracts - EUR |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Balance | 261,322 | 250,162 |  |  |  |  |  |
Barclays Facility |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Balance | 321,546 | 321,546 |  |  |  |  |  |
Collateral | 422,548 | 420,774 |  |  |  |  |  |
Maximum Month-End Balance | 321,546 | 353,153 |  |  |  |  |  |
Average Month-End Balance | 321,546 | 242,792 |  |  |  |  |  |
Barclays Facility | USD |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Balance | 321,546 | 321,546 |  |  |  |  |  |
MUFG Facility |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Balance | 79,345 | 171,972 |  |  |  |  |  |
Collateral | 166,934 | 209,493 |  |  |  |  |  |
Maximum Month-End Balance | 110,772 | 211,057 |  |  |  |  |  |
Average Month-End Balance | 92,179 | 197,420 |  |  |  |  |  |
MUFG Facility | Fx contracts - GBP |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Balance | 79,345 | 171,972 |  |  |  |  |  |
Churchill |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Balance | 119,982 | 121,289 |  |  |  |  |  |
Collateral | 160,278 |  |  |  |  |  |  |
Maximum Month-End Balance | 120,853 |  |  |  |  |  |  |
Average Month-End Balance | 120,417 |  |  |  |  |  |  |
Churchill | USD |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Balance | 119,982 | 121,289 |  |  |  |  |  |
Santander Facility | USD |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Balance | 0 | 0 |  |  |  |  |  |
Collateral |  | 0 |  |  |  |  |  |
Maximum Month-End Balance |  | 67,500 |  |  |  |  |  |
Average Month-End Balance |  | 56,250 |  |  |  |  |  |
Santander Facility | Fx contracts - EUR |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Balance |  | 0 |  |  |  |  |  |
Collateral |  | 0 |  |  |  |  |  |
Maximum Month-End Balance |  | 54,677 |  |  |  |  |  |
Average Month-End Balance |  | 22,684 |  |  |  |  |  |
Barclays Securitization |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Balance | 1,667,312 | 1,587,779 | £ 724.7 | € 493.2 | kr 2.0 | £ 716.8 | € 493.9 | kr 2.0
Collateral | 2,296,668 | 2,182,088 |  |  |  |  |  |
Maximum Month-End Balance | 1,667,312 | 2,249,538 |  |  |  |  |  |
Average Month-End Balance | 1,614,412 | 2,041,421 |  |  |  |  |  |
Revolving Credit Facility |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Balance | 0 | 0 |  |  |  |  |  |
Collateral | 69,031 | 0 |  |  |  |  |  |
Maximum Month-End Balance | 0 | 150,000 |  |  |  |  |  |
Average Month-End Balance | 0 | 38,796 |  |  |  |  |  |
Churchill Facility |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Collateral |  | 161,264 |  |  |  |  |  |
Maximum Month-End Balance |  | 126,080 |  |  |  |  |  |
Average Month-End Balance |  | 123,684 |  |  |  |  |  |
JP Morgan Chase, DB Repurchase Facility, Goldman Sachs, Credit Suisse, Barclays Facility, HSBC Facilities And Barclays Securitization |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |
Balance | $ 5,229,793 | $ 4,823,762 |  |  |  |  |  |

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