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Income Taxes - Net Deferred Tax Assets (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Deferred tax assets (DTAs): |  |
Net operating loss and tax credit carryforwards | $ 87,007 | $ 91,113
Unrealized mark-to-market, impairments and loss provisions | 16,977 | 16,170
Other realized / unrealized treatment differences | (32,891) | (34,923)
Total deferred tax assets | 71,093 | 72,360
Less: valuation allowance | (71,093) | (72,360)
Net deferred tax assets | $ 0 | $ 0

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