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Financing Arrangements - UBS Facility Narrative (Details) $ in Thousands |  |  |  |  |  |  |  |  |  | 4 Months Ended | 12 Months Ended |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 27, 2024 USD ($) | Jun. 14, 2023 | Apr. 14, 2023 USD ($) | Mar. 07, 2023 USD ($) | Aug. 20, 2021 USD ($) | Dec. 17, 2020 USD ($) | Nov. 19, 2020 | Nov. 09, 2020 | May 19, 2017 USD ($) subsidiary d | Apr. 02, 2018 USD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Aug. 16, 2023 USD ($) | Apr. 19, 2022 USD ($) | Dec. 14, 2021 USD ($) | Jul. 01, 2021 USD ($) | Dec. 31, 2020 USD ($) | May 19, 2020 USD ($) | Dec. 01, 2017 USD ($)
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  |  |  |  | $ 1,099,187 | $ 1,081,701 |  |  |  |  |  |  |
Amount Outstanding |  |  |  |  |  |  |  |  |  |  | 1,117,344 |  |  |  |  |  |  |  |
Total assets |  |  |  |  |  |  |  |  |  |  | 1,945,728 | $ 2,001,724 |  |  |  |  |  |  |
Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rate |  | 3.375% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Murray Hill Funding II |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total assets |  |  |  |  |  |  |  |  |  |  | $ 190,924 |  |  |  |  |  |  |  |
UBS Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of financing subsidiaries | subsidiary |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |
Debt instrument, aggregate principal amount |  |  |  |  |  |  |  |  | $ 125,000 | $ 200,000 |  |  |  |  |  |  |  |  |
Debt instrument, redemption price, percentage of principal amount redeemed |  |  |  |  |  |  |  |  | 65.00% | 75.00% |  |  |  |  |  |  |  |  |
Rate |  | 3.525% |  |  |  | 3.375% | 3.90% | 3.90% | 3.50% |  | 3.20% |  |  |  |  |  |  |  |
Debt instrument, repurchased face amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 133,333 |
Debt instrument, repurchase amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 100,000 | $ 100,000 |
Long-term debt |  |  |  |  |  |  |  |  |  |  | $ 100,000 |  |  |  |  |  | $ 133,333 |  |
Debt instrument, variable interest rate, type [extensible enumeration] |  |  |  |  |  |  |  |  |  |  | Secured Overnight Financing Rate (SOFR) |  |  |  |  |  |  |  |
Percentage of initial market value |  |  |  |  |  | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |
UBS Facility | Murray Hill Funding II |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, aggregate principal amount |  |  |  |  |  |  |  |  | $ 192,308 |  |  |  |  |  |  |  |  |  | $ 266,667
Number of business days to cure payment failure | d |  |  |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  |  |  |
Debt issuance costs, gross |  |  |  |  |  | $ 2,637 |  |  |  |  |  |  |  |  |  |  |  |  |
A-R Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, redemption price, percentage of principal amount redeemed |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |
Debt instrument, repurchased face amount | $ 22,500 |  | $ 25,000 | $ 17,500 | $ 21,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, repurchase amount | 22,500 |  | 25,000 | 17,500 | 21,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of long-term debt | $ 22,500 |  | $ 25,000 | $ 17,500 | $ 21,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
A-R Notes | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rate |  |  |  |  |  | 3.375% |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, repurchased face amount |  |  |  |  |  |  |  |  |  |  |  |  | $ 22,500 | $ 17,500 | $ 25,000 | $ 21,000 |  |  |
Amount Outstanding |  |  |  |  |  | $ 50,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount that may be issued |  |  |  |  |  | $ 150,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Unused fee percentage |  |  |  |  |  | 0.75% |  |  |  |  |  |  |  |  |  |  |  |  |

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