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