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Fair Value of Financial Instruments - Valuation for Level 3 Liabilities (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Total losses/(gains) (realized/unrealized) |  |  |
Fair Value Recurring Basis Unobservable Input Reconciliation Liability Gain Loss Statement Of Income Extensible List Not Disclosed Flag | Included in earnings | Included in earnings | Included in earnings
Consolidated SLST | VIE, Primary Beneficiary |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Balance at beginning of period | $ 634,495 | $ 839,419 | $ 1,054,335
Total losses/(gains) (realized/unrealized) |  |  |
Included in earnings | 5,718 | (90,077) | (54,154)
Paydowns | (46,476) | (114,847) | (160,762)
Balance at the end of period | $ 593,737 | $ 634,495 | $ 839,419

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