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Secured Debt Arrangements, Net - Additional Information (Details) € in Millions, £ in Millions, kr in Millions | 1 Months Ended | 3 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 30, 2019 USD ($) extension | Jul. 31, 2018 | Mar. 31, 2022 USD ($) loan | Mar. 31, 2022 EUR (€) | Mar. 31, 2021 USD ($) | Mar. 31, 2022 GBP (£) loan | Mar. 31, 2022 EUR (€) loan | Mar. 31, 2022 SEK (kr) loan | Jan. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2021 GBP (£) | Dec. 31, 2021 EUR (€) | Dec. 31, 2021 SEK (kr) | Mar. 31, 2021 GBP (£) | Jun. 30, 2020 USD ($) | Nov. 30, 2017 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average haircut under repurchase agreements |  |  | 29.50% |  |  | 29.50% | 29.50% | 29.50% |  | 30.20% | 30.20% | 30.20% | 30.20% |  |  |
Repayments of secured debt arrangements |  |  | $ 542,213,000 |  | $ 331,613,000 |  |  |  |  |  |  |  |  |  |  |
HSBC Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Loans | loan |  |  | 1 |  |  | 1 | 1 | 1 |  |  |  |  |  |  |  |
Barclays Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Loans | loan |  |  | 1 |  |  | 1 | 1 | 1 |  |  |  |  |  |  |  |
Santander Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Loans | loan |  |  | 1 |  |  | 1 | 1 | 1 |  |  |  |  |  |  |  |
Barclays Securitization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Loans | loan |  |  | 3 |  |  | 3 | 3 | 3 |  |  |  |  |  |  |  |
Line of Credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing under facility |  |  | $ 5,342,032,000 |  |  |  |  |  |  | $ 4,932,049,000 |  |  |  |  |  |
Balance |  |  | 4,582,019,000 |  |  |  |  |  |  | 4,159,330,000 |  |  |  |  |  |
Borrowings outstanding |  |  | 4,571,314,000 |  |  |  |  |  |  | 4,150,268,000 |  |  |  |  |  |
Line of Credit | JP Morgan Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance |  |  | 1,354,116,000 |  |  |  |  |  |  | 1,484,992,000 |  |  |  |  |  |
Line of Credit | JP Morgan Facility | USD |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing under facility |  |  | 1,415,051,000 |  |  |  |  |  |  | 1,344,283,000 |  |  |  |  |  |
Borrowings outstanding |  |  | 1,269,796,000 |  |  |  |  |  |  | 1,329,923,000 |  |  |  |  |  |
Line of Credit | JP Morgan Facility | Fx contracts - EUR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing under facility |  |  | 0 |  |  |  |  |  |  | 68,220,000 |  |  |  |  |  |
Borrowings outstanding |  |  | 0 |  |  |  |  |  |  | 68,220,000 |  |  |  |  |  |
Line of Credit | DB Repurchase Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing under facility |  |  |  |  |  |  |  |  | $ 700,000,000 |  |  |  |  |  |  |
Balance |  |  | 421,461,000 |  |  |  |  |  |  | 259,073,000 |  |  |  |  |  |
Borrowings outstanding |  |  | 421,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit | DB Repurchase Facility | USD |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing under facility |  |  | 700,000,000 |  |  |  |  |  |  | 700,000,000 |  |  |  |  |  |
Borrowings outstanding |  |  | 421,461,000 |  |  |  |  |  |  | 259,073,000 |  |  |  |  |  |
Line of Credit | Goldman Sachs Repurchase Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing under facility |  |  | 300,000,000 |  |  |  |  |  |  |  |  |  |  |  |  | $ 500,000,000
Balance |  |  | $ 159,618,000 |  |  |  |  |  |  | 168,231,000 |  |  |  |  |  |
Debt instrument, amortization period |  |  | 2 years | 2 years |  |  |  |  |  |  |  |  |  |  |  |
Borrowings outstanding |  |  | $ 159,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit | Goldman Sachs Repurchase Facility | USD |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing under facility |  |  | 300,000,000 |  |  |  |  |  |  | 300,000,000 |  |  |  |  |  |
Borrowings outstanding |  |  | 159,618,000 |  |  |  |  |  |  | 168,231,000 |  |  |  |  |  |
Line of Credit | Credit Suisse Facility | USD |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing under facility |  |  | 486,319,000 |  |  |  |  |  |  | 161,609,000 |  |  |  |  |  |
Balance |  |  | 470,651,000 |  |  |  |  |  |  | 148,720,000 |  |  |  |  |  |
Borrowings outstanding |  |  | 470,651,000 |  |  |  |  |  |  | 148,720,000 |  |  |  |  |  |
Term after either party notifies the other party of intention to terminate |  | 6 months |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit | HSBC Facility | Fx contracts - EUR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing under facility |  |  | 163,285,000 |  |  |  |  |  |  | 167,756,000 |  |  |  |  |  |
Balance |  |  | 158,592,000 |  |  |  |  |  |  | 162,937,000 |  |  |  |  |  |
Borrowings outstanding |  |  | 158,592,000 |  |  |  |  |  |  | 162,937,000 |  |  |  |  |  |
Line of credit, amount outstanding |  |  | 158,600,000 |  |  |  | € 143.3 |  |  |  |  |  |  |  |  |
Line of Credit | Barclays Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of secured debt arrangements | € |  |  |  | € 16.5 |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit | Barclays Facility | USD |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing under facility |  |  | 200,000,000 |  |  |  |  |  |  | 200,000,000 |  |  |  |  |  |
Balance |  |  | 32,693,000 |  |  |  |  |  |  | 32,693,000 |  |  |  |  |  |
Borrowings outstanding |  |  | 32,693,000 |  |  |  |  |  |  | 32,693,000 |  |  |  |  |  |
Line of Credit | Santander Facility | Fx contracts - EUR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing under facility |  |  | 59,800,000 |  |  |  | 54.0 |  |  | 0 |  |  |  |  |  |
Balance |  |  | 52,222,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings outstanding |  |  | 52,222,000 |  |  |  |  |  |  | 0 |  |  |  |  |  |
Line of credit, amount outstanding |  |  | 52,200,000 |  |  |  | 47.2 |  |  |  |  |  |  |  |  |
Line of Credit | Barclays Securitization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance |  |  | 1,932,666,000 |  |  |  |  |  |  | 1,902,684,000 |  |  |  |  |  |
Borrowings outstanding |  |  |  |  |  | £ 925.4 | € 448.7 | kr 2,100.0 |  |  |  |  |  |  |  |
Line of Credit | Barclays Securitization | VIE |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing under facility |  |  | 1,932,666,000 |  |  |  |  |  |  | 1,902,684,000 |  |  |  |  |  |
Borrowings outstanding |  |  | $ 1,932,666,000 |  |  |  |  |  |  | 1,902,684,000 |  |  |  |  | $ 782,000,000 |
Deferring or waiving debt service payments, term |  |  | 18 months | 18 months |  |  |  |  |  |  |  |  |  |  |  |
Repayments of secured debt arrangements |  |  | $ 18,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Increase in financing spread |  |  | 0.25% | 0.25% |  |  |  |  |  |  |  |  |  |  |  |
Amended and Restated JPMorgan Facility | Line of Credit | JP Morgan Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing under facility | $ 1,500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of extensions available | extension | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Extension option |  |  | 1 year | 1 year |  |  |  |  |  |  |  |  |  |  |  |
Balance |  |  | $ 1,400,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings outstanding |  |  | 84,300,000 |  |  | £ 64.2 |  |  |  |  |  |  |  |  |  |
Commercial Loan One | Line of Credit | Barclays Securitization | VIE |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance |  |  |  |  |  |  |  |  |  | $ 1,300,000,000 | £ 572.7 | € 237.6 | kr 2,600.0 |  |  |
Commercial Loan Two | Line of Credit | Barclays Securitization | VIE |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance |  |  |  |  | 177,100,000 |  |  |  |  |  |  |  |  | £ 134.8 |  |
Commercial Loan Three | Line of Credit | Barclays Securitization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings outstanding |  |  | $ 454,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial Loan Three | Line of Credit | Barclays Securitization | VIE |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance |  |  |  |  | 174,200,000 |  |  |  |  |  |  |  |  | 157.4 |  |
Commercial Loan Four | Line of Credit | Barclays Securitization | VIE |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance |  |  |  |  | $ 103,500,000 |  |  |  |  |  |  |  |  | £ 78.8 |  |

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