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DISCONTINUED OPERATION - Components of Anticiapted Loss on Sale (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2025 | Sep. 30, 2025 | Mar. 31, 2025 | Sep. 30, 2025 | Dec. 31, 2024 | Dec. 31, 2021 | Jun. 04, 2024
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right |  | 5,092,707 |  | 5,092,707 |  |  |
AOCI Impact of Disposal of Discontinued Operation | $ (85,096) |  |  |  |  |  |
Warrants exercise price (in dollars per share) | $ 18.50 |  |  |  |  |  |
Discontinued Operation, Additional Consideration |  | $ 4,300 |  |  |  |  |
Ambac Assurance Corporation | Discontinued Operations, Held-for-Sale or Disposed of by Sale |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Fair value of net consideration to be received | $ 407,300 |  |  |  | $ 399,727 |  |
Less: estimated closing costs | 7,098 |  |  |  | 7,235 |  |
Fair value of net consideration to be received after estimated closing costs | 400,202 |  |  |  | 392,492 |  |
Carrying amount of net assets held-for-sale | $ 1,002,719 |  |  |  | 962,637 |  |
Loss on disposal |  |  | $ 570,145 | $ 687,613 | $ (570,145) | $ 0 |
Warrants exercise price (in dollars per share) |  |  |  |  |  |  | $ 18.50

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