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Secured Debt Arrangements, Net - Assets Under Barclays Private Securitization (Details) - Line of Credit $ in Thousands, € in Millions, £ in Millions | Dec. 31, 2020 USD ($) | Dec. 31, 2020 GBP (£) | Dec. 31, 2020 EUR (€) | Jun. 30, 2020 USD ($) | Dec. 31, 2019 USD ($)
--- | --- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |  |
Borrowings outstanding | $ 3,436,672 |  |  |  | $ 3,078,366
Barclays Securitization |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Borrowings outstanding |  | £ 518.0 | € 122.5 |  |
VIE | Barclays Securitization |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Borrowings outstanding | 857,728 |  |  | $ 782,000 |
Weighted Average | VIE | Barclays Securitization |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Borrowings outstanding | 857,728 |  |  |  |
Weighted Average | VIE | Fx contracts - GBP | Barclays Securitization |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Borrowings outstanding | 708,130 |  |  |  |
Weighted Average | VIE | Fx contracts - EUR | Barclays Securitization |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Borrowings outstanding | $ 149,598 |  |  |  |

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